Solenopsis

Solenopsis; Temporal range: 33.9–0 Ma K Pa Eo Ol Mi Pl Early Oligocene – Recent
	Solenopsis geminata
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Solenopsidini
Genus:	Solenopsis; Westwood, 1840
Type species
	Solenopsis mandibularis (junior synonym of Solenopsis geminata);
Diversity
	216 species; 9 fossil species; (Species Checklist, Species by Country) Solenopsis geminata Specimen Label
Synonyms
	Bisolenopsis Kusnezov, 1953; Carebarella Emery, 1906; Carebarelloides Borgmeier, 1937; Diagyne Santschi, 1923; Diplorhoptrum Mayr, 1855; Euophthalma Creighton, 1930; Granisolenopsis Kusnezov, 1956; Labauchena Santschi, 1930; Lilidris Kusnezov, 1956; Octella Forel, 1915; Oedaleocerus Creighton, 1930; Paranamyrma Kusnezov, 1953; Synsolenopsis Forel, 1918;

Evolutionary Relationships

Solenopsidini

Stegomyrmex

	Dolopomyrmex

	Rogeria

	Bariamyrma

	Rogeria

Solenopsis

	Kempfidris

	Tropidomyrmex

Austromorium, Monomorium, Oxyepoecus

Megalomyrmex

Tyrannomyrmex

	some Monomorium

	Epelysidris

	Anillomyrma

	Myrmicaria

Monomorium

	Syllophopsis

	Adelomyrmex, Baracidris, Cryptomyrmex

Based on Ward et al., 2014

Solenopsis is a large, cosmopolitan, and taxonomically difficult genus of mostly minute, monomorphic, wholly subterranean species. These minute species frequently live as thief ants within the colonies of other larger species of ants or termites. Some New World species are larger and the workers are polymorphic. These species have colonies that can be very large and the workers are aggressive surface foragers. These ants are commonly referred to as "fire ants" because of the intense, burning sensation caused by their stings. The fire ants are important pest species. (Wheeler and Wheeler 1986)

Photo Gallery

Solenopsis molesta worker. Image by Alex Wild.
Solenopsis sp., a male thief ant prepares to depart on a nighttime mating flight. Tucson, Arizona, USA. Photo by Alex Wild.

Identification

Workers can be separated from similar genera such as Monomorium, Dolopomyrmex, Carebara by the ten segmented antenna and the two segmented antennal club. There are english and spanish keys for the New World thief ants.

Deyrup and Prusak (2008) - Members of the genus can usually be recogniszed by the following combination of character states: 2-segmeneted petiole, 2-segmented antennal club; propodeum lacking spines or angles; petiolar node well developed; head and body shining, localized striae; clypeus longitudinally carinate, with a median, apical marginal seta.

Keys including this Genus

Keys to Subgenera or Species Groups in this Genus

Key to New World Solenopsis Species Complexes

Keys to Species in this Genus

Distribution

Distribution and Richness based on AntMaps

Species by Region

Number of species within biogeographic regions, along with the total number of species for each region.

	Afrotropical Region	Australasian Region	Indo-Australian Region	Malagasy Region	Nearctic Region	Neotropical Region	Oriental Region	Palaearctic Region
Species	29	10	9	4	30	112	3	57
Total Species	2837	1734	3036	929	832	4375	1686	2823

Fossils

Fossils are known from: Brunstatt, Haut-Rhin, France (Early Oligocene), Khronya Cape, Kerch, Crimea, Russian Federation (Sarmatian, Upper Miocene), Kleinkems, Germany (Early Oligocene).

Biology

Pitts et. al. (2018) - There are approximately 190 described species of Solenopsis worldwide (Bolton 1995). Most of these species are characterized by small, monomorphic workers that form small colonies and can display a lestobiotic lifestyle, living in the nest walls of other ant species from which they steal food and brood (Thompson 1980, 1989; Pacheco and Mackay 2013). These habits have earned such Solenopsis species the name “thief ants.” A smaller group composed of five species of Solenopsis are considered inquiline social parasites of other ant species. These inquiline social parasites live alongside the host queen, generally lack a worker caste, and their brood is made up only of sexuals (Buschinger 2009). Among the remaining Solenopsis are 20 New World species that differ greatly from the thief ants and social parasites in their biology. These species have larger, polymorphic workers, form enormously populous colonies, and are highly aggressive in their foraging and defensive habits. The painful sting wielded by the workers has earned such Solenopsis species the name “fire ants.” Most fire ant species are Neotropical, although five species are native to North America (Chialvo et al. 2018). One of these (Solenopsis geminata (Fabricius), the tropical fire ant) and two of the Neotropical species (Solenopsis invicta Buren, the red imported fire ant, and Solenopsis richteri Forel, the black imported fire ant) have been inadvertently introduced to locations far from their native ranges. Solenopsis geminata has been introduced throughout the tropics worldwide (Wetterer 2011, Gotzek et al. 2015), S. invicta has been introduced to the United States and several other Pacific Rim countries (Lofgren 1986, Callcott and Collins 1996, Henshaw et al. 2005, Ascunce et al. 2011, Wetterer 2013), and S. richteri has been introduced to the United States (Lofgren 1986).

Solenopsis invicta and S. richteri have become economically important pests in the United States, where they invade lawns, pastures, and roadsides, attacking and stinging native animals, livestock, and humans when colonies are disturbed, and evidently out-competing native ants for food and nesting habitat (Lofgren et al. 1975, Jouvenaz 1990, Guillebeau et al. 2002, Tschinkel 2006). Annual economic losses in the United States attributable to the imported fire ants are estimated at $6 billion (Lard et al. 2006). Although the pugnacious nature of these exotic ants makes them undesirable inhabitants of areas that they have newly colonized, they nonetheless have become premier objects of study for ecologists and evolutionary biologists. For instance, fire ants offer one of relatively few well-documented cases of the formation of a hybrid zone in historical times (Vander Meer et al. 1985, Ross et al. 1987a, Shoemaker et al. 1996), which makes them a rich source of information for genetic studies of speciation (Baack and Rieseberg 2007, Nolte and Tautz 2010). Fire ants also show variation in the social organization of their colonies, some of which appears to be under simple genetic control (Krieger and Ross 2002, Wang et al. 2013), making them important model systems in the study of social evolution (Gotzek and Ross 2007, Smith et al. 2008, Robinson et al. 2008, Fischman et al. 2011). The flexibility demonstrated by some species in having either a single egg-laying gyne (monogyny) or multiple egg-laying gynes (polygyny) in a single colony has sparked comparative ecological and evolutionary studies about the causes and consequences of such variation (Vargo and Fletcher 1987, Ross and Keller 1995, Porter et al. 1997, Gotzek and Ross 2007, Huang and Wang 2014). Solenopsis also includes several social parasites that use various ant species as their hosts (Calcaterra et al. 2000, Davis and Deyrup 2006, Deyrup and Prusak 2008), a characteristic that is of great interest for studies of social evolution as well as integrated pest management.

Historically, Solenopsis has been a taxonomically difficult group (Creighton 1930, 1950; Wilson 1952; Buren 1972; Trager 1991; Pacheco and Mackay 2013). In South America, where species diversity is highest, distinguishing Solenopsis species is exceedingly difficult due to a paucity of reliable characters that are constant within putative species yet differ between them. Frustration with this situation prompted Carlo Emery to call the group the crux myrmecologorum (Creighton 1930).

The Solenopsis social parasites.— Because Labauchena and Paranamyrma were synonymized under Solenopsis (Ettershank 1966), Solenopsis now includes several species of social parasites. Two of these, Solenopsis daguerrei and Solenopsis hostilis, parasitize fire ants, whereas Solenopsis solenopsidis parasitizes thief ants (formerly Paranamyrma; Santschi 1930, Kusnezov 1954, Borgmeier 1959), and Solenopsis phoretica and Solenopsis enigmatica parasitize Pheidole. The social parasites lead an especially interesting life style when compared to other Solenopsis species, because the parasitic gyne enters a heterospecific colony and usurps the reproductive role of the host queen, rather than initiating her own colony or joining a conspecific one (as in the case of polygyne fire ants).

Solenopsis daguerrei, S. solenopsidis and, perhaps, S. hostilis exhibit permanent social parasitism. Solenopsis daguerrei has been reported to kill the host queen in laboratory studies (temporary social parasitism; Bruch 1930), but has been found to allow the host queen to live in field studies (permanent social parasitism; Silveira-Guido et al. 1965). It may be that under certain conditions S. daguerrei exhibit either form of social parasitism. This species is known to be a social parasite of Solenopsis invicta, S.richteri, Solenopsis macdonaghi, and Solenopsis quinquecuspis (Santschi 1930, Briano et al. 1997, Calcaterra et al. 2000). Borgmeier (1959) reported S. hostilis as a parasite of Solenopsis saevissima (Smith), but did not gather any natural history information for the species. Solenopsis solenopsidis is reported to be a permanent social parasite of Solenopsis clytemnestra Emery (Kusnezov 1954). Holldobler and Wilson (1990) reviewed social parasitism and included the known parasites and hosts of the Solenopsis social parasites.

Pacheco and Mackay (2013) - The thief ants group of the genus Solenopsis is virtually cosmopolitan throughout the New World. The genus ranges from southern Canada to Argentina. The majority of the species can be found in tropical rain forests, especially in areas of thick leaf litter. Most colonies of the smaller species are found in the soil without an entrance hole, unless nuptial flights are occurring. Occasionally nests are discovered under stones, but are often found while one is excavating the nest of another ant species (Mackay and Mackay 2002). They are considered thief ants because they pilfer the nests of other ants, where they steal brood or food. Some species are considered pests, such as Solenopsis molesta, perhaps the most abundant of the "smaller species." It can be found in parks and residential areas and occasionally is a house pest. Many species can be collected with subterranean baited traps set at least 10 cm down in the soil column. The ecology of most species is virtually unknown.

An apparently undescribed Solenopsis queen attached to a Pheidole tetra queen. Image by Alex Wild.

Alex Wild (March, 2017) - As best as I can discern, this little Solenopsis is undescribed. She was clinging to the petiole of a Pheidole tetra queen at Brackenridge Field Lab, Texas, and remained firmly attached even in ethanol. While similar to Solenopsis phoretica, she differs in the structure of the petiolar process and in the pilosity.

Association with Other Organisms

Species Uncertain

An unknown species is a associate (details unknown) for the fungus Myrmecomyces annellisae (a associate (details unknown)) (Quevillon, 2018).
An unknown species is a host for the bacterium Pseudomonas sp. (a parasite) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission within nest).
An unknown species is a host for the eucharitid wasp Orasema pireta (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
An unknown species is a host for the eucharitid wasp Orasema pireta (a parasite) (Varone et al., 2010; Baker et al., 2019) (primary host).
An unknown species is a host for the eucharitid wasp Orasema sp. (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
An unknown species is a host for the fungus Myrmicinosporidium durum (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission within nest).
An unknown species is a host for the microsporidian fungus Burenella dimorpha (a parasitoid) (Quevillon, 2018) (encounter mode secondary; direct transmission; transmission within nest).
An unknown species is a host for the microsporidian fungus Kneallhazia solenopsae (a parasite) (Quevillon, 2018) (multiple encounter modes; direct transmission; transmission within nest).
An unknown species is a host for the nematode Steinerema carpocapsae (a parasitoid) (Quevillon, 2018) (multiple encounter modes; indirect transmission; transmission outside nest).
An unknown species is a host for the phorid fly Pseudacteon conicornis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
An unknown species is a host for the phorid fly Pseudacteon curvatus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
An unknown species is a host for the diapriid wasp Bruesopria sp. (a parasite) (www.diapriid.org) (potential host).

All Associate Records for Genus

Explore Associate Data: All, Drilldown

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Taxon	Relationship	Associate Type	Associate Taxon	Associate Relationship	Locality	Source	Notes
Solenopsis	associate (details unknown)	fungus	Myrmecomyces annellisae	associate (details unknown)		Quevillon, 2018
Solenopsis	host	bacterium	Pseudomonas sp.	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis	host	diapriid wasp	Bruesopria sp.	parasite		www.diapriid.org	potential host
Solenopsis	host	eucharitid wasp	Orasema pireta	parasite		Varone et al., 2010; Baker et al., 2019	primary host
Solenopsis	host	eucharitid wasp	Orasema pireta	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis	host	eucharitid wasp	Orasema sp.	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis	host	fungus	Myrmicinosporidium durum	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis	host	microsporidian fungus	Burenella dimorpha	parasitoid		Quevillon, 2018	encounter mode secondary; direct transmission; transmission within nest
Solenopsis	host	microsporidian fungus	Kneallhazia solenopsae	parasite		Quevillon, 2018	multiple encounter modes; direct transmission; transmission within nest
Solenopsis	host	nematode	Steinerema carpocapsae	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis	host	phorid fly	Pseudacteon conicornis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis	host	phorid fly	Pseudacteon curvatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis aurea	host	phorid fly	Pseudacteon crawfordi	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis carolinensis	host	diapriid wasp	Auxopaedeutes sp.	parasite		www.diapriid.org	potential host
Solenopsis carolinensis	host	fungus	Myrmicinosporidium durum	pathogen	United States	Pereira, 2004; Espadaler & Santamaria, 2012
Solenopsis carolinensis	host	microsporidian fungus	Kneallhazia carolinensae	pathogen		Valles et al., 2011
Solenopsis carolinensis	host	virus	Aparavirus: Solenopsis invicta virus-1	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis daguerrei	host	eucharitid wasp	Orasema xanthopus	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis daguerrei	inquiline	ant	Solenopsis invicta	host		de la Mora et al., 2021; Briano et al. 1997; Calcaterra et al. 2000; Dedeine et al., 2005; Santschi 1930
Solenopsis daguerrei	inquiline	ant	Solenopsis macdonaghi	host		Santschi 1930; Briano et al. 1997; Calcaterra et al. 2000
Solenopsis daguerrei	inquiline	ant	Solenopsis quinquecuspis	host		de la Mora et al., 2021; Briano et al. 1997; Calcaterra et al. 2000; Dedeine et al., 2005; Santschi 1930
Solenopsis daguerrei	inquiline	ant	Solenopsis richteri	host		de la Mora et al., 2021; Briano et al. 1997; Calcaterra et al. 2000; Santschi 1930
Solenopsis electra	host	phorid fly	Pseudacteon andinus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis enigmatica	inquiline	ant	Pheidole antillana	host	Dominica	de la Mora et al., 2021; Deyrup & Prusak, 2008
Solenopsis fugax	associate (details unknown)	diapriid wasp	Solenopsia imitatrix	associate (details unknown)		Quevillon, 2018
Solenopsis fugax	host	fungus	Myrmicinosporidium durum	pathogen	Turkey, Bulgaria, Romania, Czech Republic, Slovakia, Germany, Poland, France, Croatia (Krk), Switzerland	Holldobler, 1929; Holldobler, 1933; Buschinger & Winter, 1983; Buschinger et al., 2004; Csosz et al., 2012; Espadaler & Santamaria, 2012
Solenopsis fugax	host	nematode	Mermithidae (unspecified "Mermix")	parasite	Germany	Gosswald, 1930; Laciny, 2021
Solenopsis fugax	host	nematode	Mermix	parasite	Germany	Gosswald, 1929; Laciny, 2021
Solenopsis gayi	host	phorid fly	Pseudacteon obtusus	parasite	Chile	Sanchez-Restrepo et al., 2020
Solenopsis geminata	associate (details unknown)	bacterium	Acidobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Acidovorax sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Acinetobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Actinomycetospora sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Aeromicrobium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Agromyces sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Arthrobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Bacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Bacteroides sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Bradyrhizobium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Clostridium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Comamonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Conexibacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Corynebacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Duganella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Enterococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Erwinia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Exiguobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Frankia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Gemmatimonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Janthinobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Lactococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Marmoricola sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Mesorhizobium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Methylibium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Methylobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Methylocystis sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Moellerella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Morganella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Mycobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Nocardioides sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Paenibacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Pantoea sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Patulibacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Propionibacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Pseudomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Pseudonocardia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Solirubrobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Sphingomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Spiroplasma sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Staphylococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Stenotrophomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Streptococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Streptomyces sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Terrabacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Vagococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	bacterium	Zoogloea sp.	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	associate (details unknown)	phorid fly	Apterophora attophila	associate (details unknown)		Quevillon, 2018
Solenopsis geminata	host	cricket	Myrmecophilus quadrispinus	myrmecophile
Solenopsis geminata	host	eucharitid wasp	Orasema sp. b1 nr bakeri	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis geminata	host	eucharitid wasp	Orasema taii	parasite		Heraty, 1990; Chien & Heraty, 2018; Baker et al., 2019; Universal Chalcidoidea Database	primary host; ''Solenopsis geminata'' X ''xyloni'' hybrid
Solenopsis geminata	host	gregarine	Mattesia geminata	parasite	United States	Jouvenaz & Anthony, 1979
Solenopsis geminata	host	microsporidian fungus	Burenella dimorpha			Jouvenaz & Hazard, 1978; Sokolova & Fuxa, 2008
Solenopsis geminata	host	microsporidian fungus	Kneallhazia solenopsae			Ascunce et al. 2010
Solenopsis geminata	host	nematode	Mermithidae (unspec.)	parasite	USA, Florida	McInnes & Tschinkel, 1996; Laciny, 2021
Solenopsis geminata	host	nematode	Mermithidae (unspec.)	parasite	USA, Florida	Mitchell & Jouvenaz, 1985; Laciny, 2021
Solenopsis geminata	host	nematode	Steinerema carpocapsae	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon amuletum	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon andinus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon annulus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon antiguensis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon arcuatus	parasite		Pereira et al. 2015
Solenopsis geminata	host	phorid fly	Pseudacteon bifidus	parasite		Porter et al. 2018
Solenopsis geminata	host	phorid fly	Pseudacteon bispinosus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon browni	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon crawfordi	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon curvatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon deltoides	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon fowleri	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon grandis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon hippeus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon kungae	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon laticarinatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon litoralis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon lonicauda	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon obtusus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon palomita	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon pesqueroi	parasite		Pereira et al. 2015
Solenopsis geminata	host	phorid fly	Pseudacteon plowesi	parasite		Pereira et al. 2015
Solenopsis geminata	host	phorid fly	Pseudacteon quinni	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon robustus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon solenopsidis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon spatulatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon spp.	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon tricuspis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	phorid fly	Pseudacteon wasmanni	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis geminata	host	virus	Aparavirus: Solenopsis invicta virus-1	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis geminata	host	virus	Invictavirus: Solenopsis invicta virus-3	parasite		Quevillon, 2018	as ''Solenopsis geminata'' x ''xyloni''; encounter mode primary; direct transmission; transmission within nest
Solenopsis geminata	mutualist	aphid	Aphis gossypii	trophobiont		Idechiil et al., 2007; Lokeshwari et al., 2015; Saddiqui et al., 2019
Solenopsis interrupta	host	phorid fly	Pseudacteon calderensis	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon curvatus	parasite	Argentina, Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon litoralis	parasite	Bolivia, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon nocens	parasite	Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon notocaudatus	parasite	Argentina, Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon nudicornis	parasite	Argentina, Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon obtusus	parasite	Argentina, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon pradei	parasite	Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis interrupta	host	phorid fly	Pseudacteon tricuspis	parasite	Argentina, Bolivia	Sanchez-Restrepo et al., 2020
Solenopsis invicta	associate (details unknown)	bacterium	Achromobacter xylosoxidans 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Achromobacter xylosoxidans 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Acidobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Acinetobacter guillouiae	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Acinetobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Actinomycetospora sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Aeromicrobium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Agromyces sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Alcaligenes faecalis	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Anaeroplasma sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Arthrobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus cereus 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus cereus 3	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus pseudomycoides	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp. 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp. 5	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp. 6	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp. 7	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus sp. 8	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacillus thuringiensis	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bacteroides sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Bradyrhizobium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Brevibacillus laterosporus	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Brevibacterium frigoritolerans	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Brevundimonas diminuta	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Brevundimonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Caldilinea sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Clostridium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Comamonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Conexibacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Curtobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Cystobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Enterobacter amnigenus	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Enterobacter sp. 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Enterococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Erwinia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Folliculinopsis sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Gemmatimonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Geobacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Geopsychrobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Geothermobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Herbaspirillum sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Janthinobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Jeotgalicoccus halotolerans	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Klebsiella oxytoca	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Lactobacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Lactococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Loktanella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Lysinibacillus fusiformis 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Marmoricola sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Methylocystis sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Mycobacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Nocardioides sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Paenibacillus lautus	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Paenibacillus macerans	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Paenibacillus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Paenibacillus sp. 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Paenibacillus sp. 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pandoraea sp. 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pandoraea sp. 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pandoraea sp. 3	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pantoea sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Patulibacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Propionibacterium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudomonas protegens	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudomonas putida	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudomonas sp. 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudomonas sp. 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Pseudonocardia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Rahnella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Schlegelella sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia liquefaciens	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia marcescens 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia marcescens 3	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia sp. 1	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia sp. 2	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia sp. 3	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Serratia sp. 4	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Solirubrobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Sphingomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Staphylococcus epidermidis	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Staphylococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Stenotrophomonas maltophilia	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Stenotrophomonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Streptococcus sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Streptomyces sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Sulfurimonas sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Thalassobacter sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	bacterium	Zoogloea sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Aspergillus flavipes	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Aspergillus nomius	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Aspergillus tubingensis	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Cochiobolus kusanoi	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Curvularia sp.	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Fusarium equiseti	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Fusarium oxysporum	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Hypocrea lixii	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Neosartorya fischeri	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	associate (details unknown)	fungus	Penicillium spinulosum	associate (details unknown)		Quevillon, 2018
Solenopsis invicta	host	ant	Solenopsis daguerrei	inquiline
Solenopsis invicta	host	beetle	Myrmecosaurus ferrugineus	myrmecophile	Mississippi, USA	MacGown, 2006
Solenopsis invicta	host	eucharitid wasp	Orasema salebrosa	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis invicta	host	eucharitid wasp	Orasema simplex	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis invicta	host	eucharitid wasp	Orasema sp.	parasite		Universal Chalcidoidea Database	associate, primary host
Solenopsis invicta	host	eucharitid wasp	Orasema xanthopus	parasite		Silveira-Guido et al., 1964; Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis invicta	host	fungus	Aspergillus flavus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	fungus	Beauveria bassiana	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	fungus	Conidiobolus macrosporus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	fungus	Metarhizium anisopliae	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	fungus	Myrmicinosporidium durum	pathogen	United States	Pereira, 2004; Espadaler & Santamaria, 2012
Solenopsis invicta	host	gregarine	Mattesia species	parasite	United States (Florida)	Pereira et al., 2002
Solenopsis invicta	host	microsporidian fungus	Kneallhazia solenopsae	pathogen		Ascunce et al. 2010
Solenopsis invicta	host	microsporidian fungus	Thelohania solenopsae	pathogen		Knell et al. 1977; Sokolova & Fuxa, 2008
Solenopsis invicta	host	microsporidian fungus	Vairimorpha invictae	pathogen		Jouvenaz & Ellis, 1986; Sokolova & Fuxa, 2008
Solenopsis invicta	host	nematode	Allomermis solenopsi	parasite	Argentina	Poinar et al., 2007; Laciny, 2021
Solenopsis invicta	host	nematode	Diploscapter sp.	parasite		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Heterorhabditis bacteriophora	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Mermithidae (unspec.)	parasite	USA, Florida	McInnes & Tschinkel, 1996; Laciny, 2021
Solenopsis invicta	host	nematode	Mesorhabditis longespiculosa	parasite		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Oscheius dolichura	parasite		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Sclerorhabditis sp.	parasite		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Steinerema carpocapsae	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis invicta	host	nematode	Steinernema carpocapsae	parasite		Poinar, 2012
Solenopsis invicta	host	nematode	Tetradonema solenopsis	parasite	Brazil	Nickle & Jouvenaz, 1987
Solenopsis invicta	host	phorid fly	Apodicrania termitophila	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis invicta	host	phorid fly	Pseudacteon cultellatus	parasite	Argentina, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon curvatus	parasite	Argentina, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon litoralis	parasite	Argentina, Brazil, Paraguay	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon nocens	parasite	Argentina, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon nudicornis	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon obtusitus	parasite	Argentina, Uruguay	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon obtusus	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon pradei	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon solenopsidis	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon tricuspis	parasite	Argentina, Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	phorid fly	Pseudacteon wasmanni	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis invicta	host	strepsipteran	Caenocholax fenyesi	parasite	United States (Texas)	Kathirithamby & Johnston, 1992; Cook, 2019
Solenopsis invicta	host	strepsipteran	Pseudacteon onyx	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis invicta	host	virus	Aparavirus: Solenopsis invicta virus-1	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	virus	Hymenopteran ambidensovirus 1	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	virus	Invictavirus: Solenopsis invicta virus-3	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	virus	Solenopsis invicta virus-2	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	host	virus	Solenopsis invicta virus-2	parasite		Quevillon, 2018	as ''Solenopsis invicta'' x ''richteri''; encounter mode primary; direct transmission; transmission within nest
Solenopsis invicta	mutualist	aphid	Myzus persicae	trophobiont		Zhou, 2012; Zhou, 2014; Saddiqui et al., 2019
Solenopsis macdonaghi	host	ant	Solenopsis daguerrei	inquiline
Solenopsis macdonaghi	host	eucharitid wasp	Orasema salebrosa	parasite		Universal Chalcidoidea Database	primary host
Solenopsis macdonaghi	host	eucharitid wasp	Orasema simplex	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019
Solenopsis macdonaghi	host	microsporidian fungus	Kneallhazia solenopsae	parasite		Quevillon, 2018	multiple encounter modes; direct transmission; transmission within nest
Solenopsis macdonaghi	host	microsporidian fungus	Vairimorpha invictae	parasite		Quevillon, 2018	multiple encounter modes; direct transmission; transmission within nest
Solenopsis macdonaghi	host	phorid fly	Pseudacteon obtusus	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis molesta	host	cestode	Raillietina tetragona	parasitoid		Quevillon, 2018	encounter mode secondary; indirect transmission; transmission outside nest
Solenopsis molesta	host	diapriid wasp	Auxopaedeutes sp.	parasite		www.diapriid.org	potential host
Solenopsis molesta	host	eucharitid wasp	Orasema coloradensis	parasite		Wheeler, 1907; Johnson et al., 1986; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis molesta	prey	tiger beetle	Tetracha virginica	predator	United States	Valenti & Gaimari, 2000; Polidori et al., 2020
Solenopsis pergandei	host	nematode	Mermithidae (unspec.)	parasite	USA, Florida	McInnes & Tschinkel, 1996; Laciny, 2021
Solenopsis phoretica	workerless inquiline	ant	Pheidole dentata	host	Florida, United States	Davis & Deyrup, 2006	need confirmation
Solenopsis picea	xenobiont	ant	Camponotus femoratus	host	British Guiana	Weber, 1943
Solenopsis picea	xenobiont	ant	Crematogaster carinata	host	British Guiana		Weber, 1943
Solenopsis quinquecuspis	host	ant	Solenopsis daguerrei	inquiline
Solenopsis quinquecuspis	host	eucharitid wasp	Orasema aenea	parasite		Universal Chalcidoidea Database	primary host
Solenopsis quinquecuspis	host	eucharitid wasp	Orasema freychei	parasite		Varone et al., 2010; Baker et al., 2019;
Solenopsis quinquecuspis	host	eucharitid wasp	Orasema simplex	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019;
Solenopsis quinquecuspis	host	eucharitid wasp	Orasema xanthopus	parasite		Silveira-Guido et al., 1964; Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019	primary host
Solenopsis richteri	associate (details unknown)	fungus	Acremonium strictum	associate (details unknown)		Quevillon, 2018
Solenopsis richteri	associate (details unknown)	fungus	Purpureocillium lilacinum	associate (details unknown)		Quevillon, 2018
Solenopsis richteri	host	ant	Solenopsis daguerrei	inquiline
Solenopsis richteri	host	beetle	Myrmecosaurus ferrugineus	myrmecophile	Mississippi, USA	MacGown, 2006
Solenopsis richteri	host	diapriid wasp	Bruchopria hexatoma	parasite	Argentina	Loiacono, 2013; Gonzalez et al., 2016
Solenopsis richteri	host	diapriid wasp	Bruchopria pentatoma	parasite	Argentina	Loiacono, 2013; Gonzalez et al., 2016
Solenopsis richteri	host	diapriid wasp	Bruchopria pentatoma?	parasite		Masner & Garcia, 2002	potential host
Solenopsis richteri	host	diapriid wasp	Trichopria myrmecophila	parasite	Argentina	Loiacono, 2013; Gonzalez et al., 2016
Solenopsis richteri	host	eucharitid wasp	Orasema salebrosa	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis richteri	host	eucharitid wasp	Orasema simplex	parasite		Heraty et al., 1993; Varone et al., 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis richteri	host	eucharitid wasp	Orasema xanthopus	parasite		Silveira-Guido et al., 1964; Heraty et al., 1993; Varone et al. 2010; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis richteri	host	fungus	Aspergillus flavus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis richteri	host	fungus	Beauveria bassiana	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis richteri	host	microsporidian fungus	Burenella dimorpha			Sokolova & Fuxa, 2008
Solenopsis richteri	host	microsporidian fungus	Kneallhazia solenopsae			Ascunce et al. 2010
Solenopsis richteri	host	microsporidian fungus	Vairimorpha invictae			Sokolova & Fuxa, 2008
Solenopsis richteri	host	nematode	Heterorhabditis bacteriophora	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis richteri	host	nematode	Steinerema carpocapsae	parasitoid		Quevillon, 2018	multiple encounter modes; indirect transmission; transmission outside nest
Solenopsis richteri	host	nematode	Tetradonema solenopsis	parasite	Argentina	Jouvenaz & Wojcik, 1990
Solenopsis richteri	host	phorid fly	Pseudacteon borgmeieri	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis richteri	host	phorid fly	Pseudacteon cultellatus	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis richteri	host	phorid fly	Pseudacteon curvatus	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis richteri	host	phorid fly	Pseudacteon litoralis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis richteri	host	phorid fly	Pseudacteon obtusus	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis richteri	host	phorid fly	Pseudacteon tricuspis	parasite	Argentina	Sanchez-Restrepo et al., 2020
Solenopsis richteri	host	strepsipteran	Rhyncophoromyia conica	parasite		Quevillon, 2018	encounter mode secondary; indirect transmission; transmission outside nest
Solenopsis richteri	host	strepsipteran	Stichotrema beckeri	parasite		Cook, 2019
Solenopsis richteri	host	virus	Aparavirus: Solenopsis invicta virus-1	parasite		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis richteri	mutualist	aphid	Brachycaudus cardui	trophobiont		Lescano et al., 2015; Saddiqui et al., 2019
Solenopsis saevissima	associate (details unknown)	bethylid wasp	Pseudisobrachium sp.	associate (details unknown)		Quevillon, 2018
Solenopsis saevissima	associate (details unknown)	diapriid wasp	Pentapria nodicornis	associate (details unknown)		Quevillon, 2018
Solenopsis saevissima	host	diapriid wasp	Bruchopria hexatoma	parasite		www.diapriid.org
Solenopsis saevissima	host	diapriid wasp	Pentapria cf. nodicornis	parasite	Argentina	Loiacono, 2013; Gonzalez et al., 2016
Solenopsis saevissima	host	eucharitid wasp	Orasema xanthopus	parasite		Universal Chalcidoidea Database	associate, primary host
Solenopsis saevissima	host	fungus	Metarhizium anisopliae	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission within nest
Solenopsis saevissima	host	phorid fly	Apodicrania termitophila	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon aduncus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon affinis	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon borgmeieri	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon bulbosus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon calderensis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon comatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon convexicauda	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon crawfordi	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon cultellatus	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon curvatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon dentiger	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon disneyi	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon fowleri	parasite	Brazil	Pereira et al. 2015; Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon lenkoi	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon litoralis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon nocens	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon nudicornis	parasite	Brazil	Williams et al., 1973; Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon obtusus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis saevissima	host	phorid fly	Pseudacteon pesqueroi	parasite		Pereira et al. 2015
Solenopsis saevissima	host	phorid fly	Pseudacteon pradei	parasite	Brazil	Williams et al., 1973; Pereira et al. 2015
Solenopsis saevissima	host	phorid fly	Pseudacteon solenopsidis	parasite	Brazil	Sanchez-Restrepo et al., 2020
Solenopsis saevissima	host	phorid fly	Pseudacteon tricuspis	parasite	Brazil	Williams et al., 1973
Solenopsis saevissima	host	phorid fly	Pseudacteon wasmanni	parasite	Brazil	Williams et al., 1973
Solenopsis tenuis	host	eucharitid wasp	Orasema sixaolae	parasite		Wheeler & Wheeler, 1937; Baker et al., 2019; Universal Chalcidoidea Database	primary host
Solenopsis xyloni	host	aphelinid wasp	Aphytis melinus	parasite		Universal Chalcidoidea Database	associate
Solenopsis xyloni	host	encyrtid wasp	Comperiella bifasciata	parasite		Universal Chalcidoidea Database	associate
Solenopsis xyloni	host	eucharitid wasp	Orasema sp.	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis xyloni	host	eucharitid wasp	Orasema sp. b1 nr bakeri	parasitoid		Quevillon, 2018	encounter mode independent; direct transmission; transmission outside nest
Solenopsis xyloni	host	eucharitid wasp	Orasema taii	parasite		Heraty, 1990; Chien & Heraty, 2018; Baker et al., 2019; Universal Chalcidoidea Database	primary host; ''Solenopsis geminata'' X ''xyloni'' hybrid
Solenopsis xyloni	host	microsporidian fungus	Kneallhazia solenopsae			Ascunce et al. 2010	listed as ''S. geminata'' X ''S. xyloni'' hybrids
Solenopsis xyloni	host	phorid fly	Pseudacteon amuletum	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis xyloni	host	phorid fly	Pseudacteon antiguensis	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis xyloni	host	phorid fly	Pseudacteon crawfordi	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest
Solenopsis xyloni	host	phorid fly	Pseudacteon spatulatus	parasitoid		Quevillon, 2018	encounter mode primary; direct transmission; transmission outside nest

Flight Period

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Taxon	Month	Source
Solenopsis amblychila	Apr	antkeeping.info
Solenopsis carolinensis	May • Jun	antkeeping.info
Solenopsis fugax	Aug • Sep	antkeeping.info
Solenopsis geminata	Apr • May	antkeeping.info
Solenopsis invicta	Apr • May • Jun • Jul	antkeeping.info
Solenopsis krockowi	Jul • Aug	Mackay & Mackay, 2002
Solenopsis molesta	Jun • Jul • Aug	antkeeping.info
Solenopsis pergandei	May • Jun	antkeeping.info
Solenopsis tennesseensis	Jul	antkeeping.info
Solenopsis texana	Jul	antkeeping.info
Solenopsis xyloni	Apr • May • Jun • Jul • Aug	antkeeping.info

Life History Traits

Worker-produced males: absent (Goetsch (1953) cited in Fletcher and Ross (1985); Frumhoff & Ward, 1992) (worker ovaries reported to be vestigial or absent)
Mean colony size: 16-555, up to 220000 in S. invicta (Greer et al., 2021)
Compound colony type: temperary parasite?; xenobiosis (Greer et al., 2021)
Nest site: hypogaeic (Greer et al., 2021)
Diet class: omnivore (Greer et al., 2021)
Foraging stratum: subterranean/leaf litter (Greer et al., 2021)
Foraging behaviour: cooperative (Greer et al., 2021)

Castes

Morphology of Sexuals

Pitts et. al. (2018) - Creighton (1930, 1950) stated that both males and gynes of Solenopsis appear to offer better characters for specific determinations than do the workers. Because individuals of the sexual caste tend to be larger than the worker caste and have a less generalized and reduced anatomy, they could provide characters, such as those from male genitalia and wing venation, that are not obtainable from workers and are useful for identification purposes (Creighton 1930, 1950). This study found that the amount of intraspecific variation occurring in the adult males and gynes was equivalent to that of workers, making the taxonomic information gained from these castes no better than that obtained from workers. Furthermore, the morphometric measurements and indices of the adult males and gynes alone are inadequate for determining species. Given a choice, workers still offer the most reliable and numerous characters, and these characters alone usually are sufficient for making accurate species identifications. Even though the morphology and morphometrics of sexuals are of limited use alone, they greatly improve the accuracy of identifications of fire ants when used in concert with data for the workers.

Male Genitalia

Pitts et. al. (2018) - For many Hymenoptera, the male genitalia are of great diagnostic utility. Sexual selection is hypothesized to often drive the rapid divergence of the morphology of male genitalia once speciation occurs (Eberhard 1985). Also, because the male genitalia are structurally complex, the likelihood that related species would become similar in this structure through parallelism is low (Mayr 1969). Thus, genitalic characters are potentially useful for distinguishing even closely related species. This is not the case for Solenopsis. Although there are slight differences between the Solenopsis fugax species-group and several of the other fire ant species-groups, this study found that the male genitalia of the species within the S. saevissima species-group were relatively homogeneous and uninformative. After study of the genitalia of many Solenopsis exemplars, we also conclude that characters used by Baroni-Urbani (1968) to raise Diplorhoptrum to the generic level are not found in all of the species he placed in this taxon. Furthermore, Diplorhoptrum species such as Solenopsis tennesseensis and Solenopsis abdita have genitalia more closely resembling those of the fire ants than those of the European Diplorhoptrum species, S. fugax. This information provides additional support for the synonymy of Diplorhoptrum with Solenopsis, as proposed by Bolton (1987).

Wing Venation

Pitts et. al. (2018) - Although wing venation in Solenopsis may provide valuable data for inferring the higher-level phylogeny of the tribe Solenopsidini in the future, as proposed by Brown and Nutting (1950), it appears to be too conservative within the S. saevissima species-group to be phylogenetically informative (Pitts et al. 2005). Moreover, wing venation tends to be too similar across species and too variable within species to provide diagnostic information.

Although some slight differences exist, the wing venation of the S. saevissima species-group is remarkably similar to that of other groups, such as the S. geminata species-group, the S. tridens species-group, the Solenopsis globularia species-group, and some members of the Solenopsis molesta species-group. Furthermore, distantly related species such as Solenopsis gensterblumi, S. nr. nigella, and an unidentified Solenopsis species are similar in their venation as well. Some species in the S. molesta species-group have diagnostic wing venation, such as the reduction of the r-rs cross vein, but others do not. In general, wing venation provides few taxonomically informative characters for the genus.

Intraspecific variation and individual aberrations in wing venation were commonly observed, including: 1) swelling in the Rs+M vein in the radial cell of a Solenopsis pusillignis gyne and S. richteri gyne; 2) coarseness of the Rs vein and the veins delineating the radial cell in individuals of several species; 3) swellings on the Cu vein of a S. macdonaghi male; 4) swellings on the Rs+M vein in the median cell of a S. megergates gyne. These abnormalities are found in other species-groups and are probably characteristic of the genus Solenopsis as a whole (see also Ross and Robertson 1990). In some cases, certain veins are misplaced so that the venation looks unique, but usually the other wing on the same individual is normal. Such asymmetry has been documented for Oxyepoecus, a close relative of Solenopsis (Kempf 1974). This variation exists as well for both spectral and nebulous veins.

The lack of the m-cu cross vein for the gynes of S. metallica and the reduction of wing venation in S. daguerrei are constant for all specimens seen and are considered characters rather than abnormalities. The lack of the m-cu cross vein for S. metallica was observed in all four forewings of the two gynes from different nests examined. All specimens of S. daguerrei had reduced wing venation, albeit to various degrees.

Other observed morphological abnormalities are noted here. A single gyne of S. megergates had two median ocelli and had coarse striations throughout the ocellar triangle. These complete striations were seen only in this single atypical specimen. One gyne of S. quinquecuspis had four propodeal spiracles. These two specimens did not otherwise differ from the typical gynes of their species. Lastly, two gynandromorphs of S. quinquecuspis were discovered, as will be discussed elsewhere.

Larval Morphology

Pitts et. al. (2018) - Wheeler and Wheeler (1976, 1986, 1991) found that larval morphology could be used to differentiate ant genera and provided a generic key using larval characters. In some cases, higher level taxonomy of Formicidae has been redefined using larval morphology (Wheeler and Wheeler 1970). Many species-level larval descriptions have been published for Formicidae, but in only three cases has larval morphology been used for phylogenetic purposes (Wheeler and Wheeler 1970, Schultz and Meier 1995, Pitts et al. 2005).

The larval stages of ten species within the Solenopsis saevissima species-group are described in this study, eight for the first time. The morphology of these species is very similar, yet some variation occurs. Wheeler and Wheeler (1977) reported that S. invicta differed from S. richteri x invicta (described as S. richteri) in the number of setae on the dorsal side of the labrum and the number of sensilla on the ventral margin of the labrum. The present survey of many specimens and species revealed that minute features such as these are quite variable within species and thus are not very useful in species determinations. Mandibular dentition is of limited use due to varying degrees of wear resulting from feeding. Solenopsis saevissima species-group larvae are of little systematic significance because most larval features are broadly overlapping and continuous among species. However, two general groups of species can be defined on the basis of larval characters. One group includes those species with bifid setae dorsal to the antennal margin (S. metallica, n. sp., S. interrupta, S. invicta, S. pusillignis, S. saevissima), a condition termed the S. saevissima type. The other group contains those species with setae dorsal to the antennal margin that are usually simple or dentate (S. macdonaghi, S. megergates, S. quinquecuspis, and S. richteri), a condition termed the S. megergates type. This latter type appears on the basis of the inferred species phylogeny to be the apomorphic condition in the species-group (Pitts et al. 2005).

Morphology

Worker Morphology

• Eyes: 11-100 ommatidia • Pronotal Spines: absent • Mesonotal Spines: absent • Propodeal Spines: absent • Petiolar Spines: absent • Caste: polymorphic • Sting: present • Metaplural Gland: present • Cocoon: absent

Karyotype

Species Uncertain

2n = 38 (Malaysia) (Goni et al., 1982) (as Diplorhoptrum sp.).
n = 11 (Australia) (Crozier, 1966).

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Taxon	Haploid	Diploid	Karyotype	Locality	Source	Notes
Solenopsis		38		Malaysia	Goni et al., 1982	as ''Diplorhoptrum'' sp.
Solenopsis	11			Australia	Crozier, 1966
Solenopsis aurea	16	32		USA	Crozier, 1970b
Solenopsis fugax		22		Japan	Imai, 1969
Solenopsis fugax	11	22		Switzerland	Hauschteck, 1961
Solenopsis geminata		32	26M+6A	India	Imai et al., 1984
Solenopsis geminata	16	32		USA	Crozier, 1970b
Solenopsis geminata	16	32	14M+12SM+6ST	French Guiana	Aguiar et al., 2020
Solenopsis invicta	16	32		USA	Glancey et al., 1976
Solenopsis molesta	11	22		USA	Crozier, 1970b
Solenopsis richteri	16	32		USA	Glancey et al., 1976
Solenopsis saevissima	16	32	20M+10ST+2A	Uruguay	Goni et al., 1983
Solenopsis xyloni	16	32	28M+4A	USA	Taber & Cokendolpher, 1988

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

SOLENOPSIS [Myrmicinae: Solenopsidini]
- Solenopsis Westwood, 1840b: 86. Type-species: Solenopsis mandibularis (junior synonym of Atta geminata), by monotypy.
- Solenopsis senior synonym of Diplorhoptrum: Mayr, 1862: 751 (see under Diplorhoptrum).
- Solenopsis senior synonym of Bisolenopsis, Diagyne, Euophthalma, Granisolenopsis, Labauchena, Lilidris, Oedaleocerus, Paranamyrma, Synsolenopsis: Ettershank, 1966: 134.
- Solenopsis senior synonym of Octella: Taylor, 1991b: 611.
BISOLENOPSIS [junior synonym of Solenopsis]
- Bisolenopsis Kusnezov, 1953d: 9. Type-species: Bisolenopsis sea, by monotypy.
- Bisolenopsis junior synonym of Solenopsis: Ettershank, 1966: 134.
CAREBARELLA [Myrmicinae: Solenopsidini]
- Carebarella Emery, 1906c: 137. Type-species: Carebarella bicolor, by monotypy.
- Carebarella senior synonym of Carebarelloides: Ettershank, 1966: 113.
- Carebarella junior synonym of Solenopsis: implied in Pacheco & Mackay, 2013: 37, 119 (type-species of Carebarella (C. bicolor Emery, 1906c: 138) was transferred to Solenopsis, establishing Carebarella as a junior synonym of Solenopsis).
CAREBARELLOIDES [junior synonym of Carebarella]
- Carebarelloides Borgmeier, 1937b: 236 [as subgenus of Carebarella]. Type-species: Carebarella (Carebarelloides) condei, by original designation.
- Carebarelloides junior synonym of Carebarella: Ettershank, 1966: 113.
DISOLENOPSIS [unavailable name]
- Disolenopsis Snelling, R.R. 1981: 397, incorrect subsequent spelling of Bisolenopsis: Bolton, 1995b: 22.
DIAGYNE [junior synonym of Solenopsis]
- Diagyne Santschi, 1923c: 268 [as subgenus of Solenopsis]. Type-species: Solenopsis succinea, by monotypy.
- Diagyne junior synonym of Solenopsis: Ettershank, 1966: 134.
DIPLORHOPTRUM [junior synonym of Solenopsis]
- Diplorhoptrum Mayr, 1855: 449. Type-species: Formica fugax, by monotypy.
- Diplorhoptrum as genus: Baroni Urbani, 1968: 68; Kutter, 1977c: 98; Bernard, 1978a: 543; Arnol'di & Dlussky, 1978: 539; Collingwood, 1979: 64; Dlussky & Fedoseeva, 1988: 80; Kupyanskaya, 1990: 132; Atanasov & Dlussky, 1992: 167; Dlussky & Radchenko, 1994: 102.
- Diplorhoptrum subgenus of Solenopsis: Creighton, 1930b: 43; Creighton, 1950a: 233; Smith, M.R. 1951a: 813; Kusnezov, 1956: 27; Kusnezov, 1957a: 273; Kusnezov, 1962b: 160; Smith, M.R. 1967: 358.
- Diplorhoptrum junior synonym of Solenopsis: Mayr, 1862: 751; Roger, 1863b: 32; Mayr, 1863: 453; Emery & Forel, 1879: 464; Dalla Torre, 1893: 75; Forel, 1915d: 9; Emery, 1922e: 195; Wheeler, W.M. 1922a: 877; Ettershank, 1966: 134; Kempf, 1972a: 232; Bolton, 1987: 285; Bolton, 1994: 106; Bolton, 1995b: 27; Bolton, 2003: 218.
EUOPHTHALMA [junior synonym of Solenopsis]
- Euophthalma Creighton, 1930b: 43 [as subgenus of Solenopsis]. Type-species: Myrmica globularia, by original designation.
- Euophthalma junior synonym of Solenopsis: Ettershank, 1966: 134.
GRANISOLENOPSIS [junior synonym of Solenopsis]
- Granisolenopsis Kusnezov, 1956: 26 [as subgenus of Solenopsis] (diagnosis in key). Type-species: Solenopsis (Granisolenopsis) granivora, by original designation.
- [Granisolenopsis also described as new by Kusnezov, 1957a: 277.]
- Granisolenopsis junior synonym of Solenopsis: Ettershank, 1966: 134.
LABAUCHENA [junior synonym of Solenopsis]
- Labauchena Santschi, 1930d: 81. Type-species: Labauchena daguerrei, by monotypy.
- Labauchena junior synonym of Solenopsis: Ettershank, 1966: 134.
LILIDRIS [junior synonym of Solenopsis]
- Lilidris Kusnezov, 1956: 26 (diagnosis in key). Type-species: Lilidris metatarsalis, by original designation.
- [Lilidris also described as new by Kusnezov, 1957a: 274 and Kusnezov, 1958b: 189.]
- Lilidris junior synonym of Solenopsis: Ettershank, 1966: 134.
OCTELLA [junior synonym of Solenopsis]
- Octella Forel, 1915b: 70 [as subgenus of Oligomyrmex]. Type-species: Oligomyrmex (Octella) pachycerus, by original designation.
- Octella junior synonym of Oligomyrmex: Ettershank, 1966: 119.
- Octella junior synonym of Solenopsis: Taylor, 1991b: 611.
OEDALEOCERUS [junior synonym of Solenopsis]
- Oedaleocerus Creighton, 1930b: 43 [as subgenus of Solenopsis]. Type-species: Solenopsis angulata, by original designation.
- Oedaleocerus raised to genus: Kusnezov, 1957a: 272.
- Oedaleocerus junior synonym of Solenopsis: Ettershank, 1966: 134.
PARANAMYRMA [junior synonym of Solenopsis]
- Paranamyrma Kusnezov, 1953d: 17. Type-species: Paranamyrma solenopsidis, by monotypy.
- [Paranamyrma also described as new by Kusnezov, 1954a: 9.]
- Paranamyrma junior synonym of Solenopsis: Ettershank, 1966: 134.
SYNSOLENOPSIS [junior synonym of Solenopsis]
- Synsolenopsis Forel, 1918b: 155 [as subgenus of Solenopsis]. Type-species: Solenopsis (Synsolenopsis) bruchi (junior primary homonym in Solenopsis, replaced by Solenopsis bruchiella), by monotypy.
- Synsolenopsis raised to genus: Kusnezov, 1953c: 341; Kusnezov, 1962b: 160.
- Synsolenopsis junior synonym of Solenopsis: Ettershank, 1966: 134.

Etymology

Mark Deyrup (2017) discovered the meaning and derivation of the genus name. Others had previously, and correctly, found the first part of the name was a derivation of the Greek Solon, which means "pipe or channel". Deyrup though was the first to realize the Greek word "opsis" can be translated as "face" and Solenopsis can be interpreted to mean "an ant with a groove on its face". Even though the heads of most Solenopsis species are not grooved, Deyrup had gone back to Westwood (1840), where the genus name was applied to the new species he named Solenopsis mandibularis. It turns out the name is based on features of the majors he examined. He noted "the toothless mandibles and the enlarged head divide into two lobes" and from this, the name was created "on account of (its) grooved face."

Beyond the name's derivation, it was subjected to an interesting twist of the rules of nomenclature. Solenopsis mandibularis is a synonym of Solenopsis geminata, an ant first described by Fabricius (1804) as Atta geminata. Thus mandibularis is no longer valid but Westwood's generic description is the first use of using a genus name other than Atta for a Solenopsis species.

References

Arnold, G. 1916. A monograph of the Formicidae of South Africa. Part II. Ponerinae, Dorylinae. Ann. S. Afr. Mus. 14: 159-270 (page 242, Solenopsis in Myrmicinae, Solenopsidini)
Ashmead, W. H. 1905c. A skeleton of a new arrangement of the families, subfamilies, tribes and genera of the ants, or the superfamily Formicoidea. Can. Entomol. 37: 381-384 (page 383, Solenopsis in Myrmicinae, Solenopsidini)
Baigorria, J.A., Rubio, G.D., Stolar, C.E., Oklander, L.I. 2021. Notes on the jumping spider Corythalia conferta (Araneae: Salticidae), a possible myrmecophagous specialist in Argentina. Peckhamia 230.1, 1-12.
Baker, A.J., Heraty, J.M., Mottern, J., Hang, J.Z., Hines, H.M., Lemmon, A.R., Lemmon, E.M. 2019. Inverse dispersal patterns in a group of ant parasitoids (Hymenoptera: Eucharitidae: Oraseminae) and their ant hosts. Systematic Entomology 45: 1–19 (doi:10.1111/syen.12371).
Barden, P. 2017. Fossil ants (Hymenoptera: Formicidae): ancient diversity and the rise of modern lineages. Myrmecological News 24: 1-30.
Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bull. Br. Mus. (Nat. Hist.) Entomol. 54: 263-452 (page 271, 285, Solenopsis in Myrmicinae, Solenopsis genus group; Solenopsis senior synonym of Diplorhoptrum)
Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 106, Solenopsis in Myrmicinae, Solenopsidini)
Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 218, Solenopsis in Myrmicinae, Solenopsidini)
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Solenopsis

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Identification

Keys including this Genus

Keys to Subgenera or Species Groups in this Genus

Keys to Species in this Genus

Distribution

Distribution and Richness based on AntMaps

Species by Region

Fossils

Biology

Association with Other Organisms

Species Uncertain

All Associate Records for Genus

Flight Period

All Flight Records for Genus

Life History Traits

Castes

Morphology

Worker Morphology

Karyotype

Species Uncertain

All Karyotype Records for Genus

Nomenclature

Etymology

References

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Solenopsis Temporal range: 33.9–0 Ma K Pa Eo Ol Mi Pl Early Oligocene – Recent

Solenopsis geminata
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Solenopsidini
Genus:	Solenopsis Westwood, 1840
Type species
Solenopsis mandibularis (junior synonym of Solenopsis geminata)
Diversity
216 species 9 fossil species (Species Checklist, Species by Country) Solenopsis geminata Specimen Label
Synonyms
Bisolenopsis Kusnezov, 1953 Carebarella Emery, 1906 Carebarelloides Borgmeier, 1937 Diagyne Santschi, 1923 Diplorhoptrum Mayr, 1855 Euophthalma Creighton, 1930 Granisolenopsis Kusnezov, 1956 Labauchena Santschi, 1930 Lilidris Kusnezov, 1956 Octella Forel, 1915 Oedaleocerus Creighton, 1930 Paranamyrma Kusnezov, 1953 Synsolenopsis Forel, 1918