Solenopsis geminata

Solenopsis geminata
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Solenopsidini
Genus:	Solenopsis
Species group:	geminata
Species:	S. geminata
Binomial name
	Solenopsis geminata; (Fabricius, 1804)
Subspecies
	Solenopsis geminata micans Stitz, 1912;
Synonyms
	Atta clypeata Smith, F., 1858; Atta coloradensis Buckley, 1867; Atta lincecumii Buckley, 1867; Atta rufa Jerdon, 1851; Crematogaster laboriosus Smith, F., 1860; Diplorhoptrum drewseni Mayr, 1861; Myrmica glaber Smith, F., 1862; Myrmica laevissima Smith, F., 1860; Myrmica mellea Smith, F., 1859; Myrmica paleata Lund, 1831; Myrmica polita Smith, F. 1862; Myrmica saxicola Buckley, 1867; Solenopsis cephalotes Smith, F., 1859; Solenopsis edouardi bahiaensis Santschi, 1925; Solenopsis edouardi perversa Santschi, 1925; Solenopsis eduardi Forel, 1912; Solenopsis geminata diabola Wheeler, W.M., 1908; Solenopsis geminata galapageia Wheeler, W.M., 1919; Solenopsis geminata innota Santschi, 1915; Solenopsis geminata medusa Mann, 1916; Solenopsis geminata nigra Forel, 1908; Solenopsis mandibularis Westwood, 1840;

Common Name

Tropical Fire Ant
Language:	English

Aka-kami-ari
Language:	Japanese

The original distribution of S. geminata was Central America to the southern United States. It has been extended to many tropical and sub-tropical areas of the world by human activities. This species is well known as one of the several pestiferous Solenopsis "fire ants". In general S. geminata prefers to nest in open fields or sunny glades, avoiding the shade of deep woods. The nests are usually irregular, sandy craters of loose construction but sometimes rotten stumps are utilized as nesting sites. The ferocity of this ant is proverbial, for the activity of the workers when disturbed never fails to attract attention, however callous the observer (Creighton 1930).

At a Glance

• Highly invasive • Supercolonies

Identification

A member of the Solenopsis geminata species-group.

Wetterer (2012) - Although S. geminata minors are very difficult to distinguish from minors of related fire ants, large majors have several distinctive cephalic characteristics that make them simple to identify. These include: (1) a disproportionally large, almost square head with parallel sides, (2) a deep longitudinal groove on the front of the head extending from a distinct medial indentation in the vertex, (3) black mandibles, often with all teeth worn off from use, and (4) short antennal scapes extending only about halfway to the occiput in the largest majors.

Keys including this Species

Distribution

In areas near Japan this species has been recorded from the Philippines and Taiwan. In Japan it was recorded from the Nansei Islands (around the U.S. Army base on Okinawa Island and at the radar site on Ie-jima Island). It was almost certainly introduced to these areas by human commerce. This species is recently found on Iwo Islands (Kubota, 1983; Terayama, 1999; Japanese Ant Image Database).

Latitudinal Distribution Pattern

Latitudinal Range: 36.00023° to -64.36°.


North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

Source: AntMaps

Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun, Gabon, Guinea, Liberia, South Africa, United Arab Emirates.
Australasian Region: Australia, New Caledonia.
Indo-Australian Region: American Samoa, Borneo, Cook Islands, Fiji, Guam, Hawaii, Indonesia, Kiribati, Malaysia, Marshall Islands, Micronesia (Federated States of), New Guinea, Northern Mariana Islands, Philippines, Samoa, Singapore, Solomon Islands, Tonga, Vanuatu.
Malagasy Region: Madagascar, Mauritius, Réunion.
Nearctic Region: Canada, United States.
Neotropical Region: Argentina, Barbados, Belize, Bolivia, Brazil, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, French Guiana, Galapagos Islands, Greater Antilles, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Lesser Antilles, Mexico, Netherlands Antilles, Nicaragua, Panama, Puerto Rico, Saint Lucia, Suriname, Trinidad and Tobago, Venezuela.
Oriental Region: Bangladesh, Cambodia, India, Laos, Nicobar Island, Pakistan, Sri Lanka, Thailand, Vietnam.
Palaearctic Region: Canary Islands, China, Greece, Italy, Japan, Republic of Korea, Türkiye.

Distribution based on AntMaps

Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Biology

San Cristóbal, República Dominicana. Video by Judá Isaí Martínez Uribe.

Wheeler (1905), Bahamas - very common on New Providence Island wherever there was soil or sand (West Bay, Nassau, Hog Island, Stanley, etc.). It constructs straggling moundlets with many entrances, garners seeds, but still retains its carnivorous instincts, stings fiercely - in short, exhibits all the traits which have gained for it the name of 'hormiga brava' in Cuba and of 'fire ant' in many other localities.

Deyrup, Davis & Cover (2000): There is no reason why a species could not be imported to a place where it is already native. Normally, one would assume that the native population, having evolved adaptive adjustments to the area, would exclude the representatives of the exotic population, or absorb and dilute the small number of immigrants beyond recognition. If, however, the exotic population has undergone natural selection that makes it better able to coexist with humans and take advantage of the resources and habitat modification that humans offer, the exotic population might be favored. Populations of S. geminata have been transported around the World; we have seen specimens from, among other places, a mid-Pacific islet, Johnson Atoll. Some of the confusing variation found among Florida populations could be due to the occurrence of one or more exotic populations overlaid on native populations.

Solenopsis geminata has been observed forming knotted balls of workers clinging to floating wood when their nests are flooded during the rainy season in the Brazilian Pantanal and the Colombian and Venezuelan Llanos (Jaffe, 1993).

Nipitwattanaphon et al. (2020) examined this species in Thailand. They found all examined colonies were polygynous with only a few queens. Queens from the same colonies were highly genetically related. Population structure was partitioned into two clusters. Pairwise FST values revealed very high genetic differentiation between colonies suggesting low gene flow among populations. This result suggests that queens were locally mated and founded colonies by a budding strategy. Isolation-by-distance among local populations was not significant.

This species is known to remove seeds (Atchison & Lucky, 2022).

Flight Period

			X	X
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

Source: antkeeping.info.

Check details at Worldwide Ant Nuptial Flights Data, AntNupTracker and AntKeeping.

Explore: Show all Flight Month data or Search these data. See also a list of all data tables or learn how data is managed.

Association with Other Organisms

Explore: Show all Associate data or Search these data. See also a list of all data tables or learn how data is managed.

Solenopsis geminata is parasitized by numerous species of phorid flies.

Porter et al. (2018) studied the fire ant decapitating fly Pseudacteon bifidus Brown and Morrison (Diptera: Phoridae) and its host specificity. This fly occurs in Texas and neighboring regions of Mexico (Plowes et al. 2009). This fly is 1 of more than 20 species of Pseudacteon decapitating flies known to parasitize tropical fire ants in their native range (Plowes et al. 2009). We found that P. bifidus was not attracted to non-Solenopsis ants presented in the field. Furthermore, no Pseudacteon species known to parasitize Solenopsis fire ants has been observed to parasitize ants in another genera despite extensive field observations.

Diptera

This species is a associate (details unknown) for the phorid fly Apterophora attophila (a associate (details unknown)) (Quevillon, 2018).
This species is a host for the phorid fly Pseudacteon arcuatus (a parasite) (Pereira et al. 2015).
This species is a host for the phorid fly Pseudacteon bifidus (a parasite) (Porter et al. 2018).
This species is a host for the phorid fly Pseudacteon pesqueroi (a parasite) (Pereira et al. 2015).
This species is a host for the phorid fly Pseudacteon plowesi (a parasite) (Pereira et al. 2015).
This species is a host for the phorid fly Pseudacteon amuletum (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon andinus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon annulus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon antiguensis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon bispinosus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon browni (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon crawfordi (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon curvatus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon deltoides (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon fowleri (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon grandis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon hippeus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon kungae (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon laticarinatus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon litoralis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon lonicauda (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon obtusus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon palomita (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon quinni (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon robustus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon solenopsidis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon spatulatus (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon spp. (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon tricuspis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
This species is a host for the phorid fly Pseudacteon wasmanni (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).

Hemiptera

This species is a mutualist for the aphid Aphis gossypii (a trophobiont) (Idechiil et al., 2007; Lokeshwari et al., 2015; Saddiqui et al., 2019).

Hymenoptera

This species is a host for the eucharitid wasp Orasema taii (a parasite) (Heraty, 1990; Chien & Heraty, 2018; Baker et al., 2019; Universal Chalcidoidea Database) (primary host; Solenopsis geminata X xyloni hybrid).
This species is a host for the eucharitid wasp Orasema sp. b1 nr bakeri (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).

Orthoptera

This species is a host for the cricket Myrmecophilus quadrispinus (a myrmecophile).

Nematode

This species is a host for the nematode Mermithidae (unspec.) (a parasite) in USA, Florida (McInnes & Tschinkel, 1996; Laciny, 2021).
This species is a host for the nematode Mermithidae (unspec.) (a parasite) in USA, Florida (Mitchell & Jouvenaz, 1985; Laciny, 2021).
This species is a host for the nematode Steinerema carpocapsae (a parasitoid) (Quevillon, 2018) (multiple encounter modes; indirect transmission; transmission outside nest).

Gregarine

This species is a host for the gregarine Mattesia geminata (a parasite) in United States (Jouvenaz & Anthony, 1979).

Fungi

This species is a host for the microsporidian fungus Kneallhazia solenopsae (Ascunce et al. 2010).
This species is a host for the microsporidian fungus Burenella dimorpha (Jouvenaz & Hazard, 1978; Sokolova & Fuxa, 2008).

Bacteria

This species is a associate (details unknown) for the bacterium Acidobacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Acidovorax sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Acinetobacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Actinomycetospora sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Aeromicrobium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Agromyces sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Arthrobacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Bacillus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Bacteroides sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Bradyrhizobium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Clostridium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Comamonas sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Conexibacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Corynebacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Duganella sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Enterococcus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Erwinia sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Exiguobacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Frankia sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Gemmatimonas sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Janthinobacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Lactococcus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Marmoricola sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Mesorhizobium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Methylibium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Methylobacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Methylocystis sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Moellerella sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Morganella sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Mycobacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Nocardioides sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Paenibacillus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Pantoea sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Patulibacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Propionibacterium sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Pseudomonas sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Pseudonocardia sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Solirubrobacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Sphingomonas sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Spiroplasma sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Staphylococcus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Stenotrophomonas sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Streptococcus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Streptomyces sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Terrabacter sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Vagococcus sp. (a associate (details unknown)) (Quevillon, 2018).
This species is a associate (details unknown) for the bacterium Zoogloea sp. (a associate (details unknown)) (Quevillon, 2018).

Virus

This species is a host for the virus Aparavirus: Solenopsis invicta virus-1 (a parasite) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission within nest).
This species is a host for the virus Invictavirus: Solenopsis invicta virus-3 (a parasite) (Quevillon, 2018) (as Solenopsis geminata x xyloni; encounter mode primary; direct transmission; transmission within nest).

Life History Traits

Queen number: monogynous (Frumhoff & Ward, 1992) (worker ovaries absent; locally polygynous)
Queen type: winged (Frumhoff & Ward, 1992) (worker ovaries absent)

Castes

Worker

Images from AntWeb


Worker. Specimen code casent0104522. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by ABS, Lake Placid, FL, USA.


Worker (major/soldier). Specimen code casent0104933. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by NHMUK, London, UK.


Worker. Specimen code casent0063126. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CAS, San Francisco, CA, USA.


Worker (major/soldier). Specimen code casent0063125. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CAS, San Francisco, CA, USA.


Worker. Specimen code casent0102966. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by NHMUK, London, UK.


Worker (major/soldier). Specimen code casent0102967. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by NHMUK, London, UK.

Additional images can be found here

Solenopsis X-ray micro-CT scan 3D model of Solenopsis geminata (minor worker) prepared by the Economo lab at OIST.

Minor worker. See on Sketchfab. See list of 3D images.

Solenopsis X-ray micro-CT scan 3D model of Solenopsis geminata (major worker) prepared by the Economo lab at OIST.

Major worker. See on Sketchfab. See list of 3D images.

Queen

Images from AntWeb


Queen (alate/dealate). Specimen code casent0055762. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CAS, San Francisco, CA, USA.


Queen (alate/dealate). Specimen code casent0104519. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by ABS, Lake Placid, FL, USA.


Queen (alate/dealate). Specimen code casent0104909. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CAS, San Francisco, CA, USA.


Queen (alate/dealate). Specimen code casent0173277. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CDRS, Galapagos, Ecuador.

Additional images can be found here

Male

Images from AntWeb


Male (alate). Specimen code casent0100826. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by UCDC, Davis, CA, USA.


Male (alate). Specimen code casent0104520. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by ABS, Lake Placid, FL, USA.


Male (alate). Specimen code casent0173276. Photographer April Nobile, uploaded by California Academy of Sciences.	Owned by CDRS, Galapagos, Ecuador.

Nomenclature

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

geminata. Atta geminata Fabricius, 1804: 423 (q.) South America (no state data).
- Type-material: syntype queens (number not stated).
- [Note: according to Zimsen, 1964: 427, there are 5 syntypes.]
- Type-locality: South America (“America meridionali”) (no further data).
- Type-depositories: ZMUC, ZMUK.
- [Misspelled as germinata by Wheeler, W.M. 1927e: 1.]
- Roger, 1862c: 289 (w.m.); Mayr, 1867a: 109 (w.q.m.); Wheeler, W.M. 1900b: 21 (l.); Wheeler, G.C. & Wheeler, J. 1955c: 132 (l.); Crozier, 1970: 116 (k.).
- Combination in Solenopsis: Mayr, 1863: 453; Roger, 1863b: 32.
- [Combination in Monomorium: Mayr, 1884: 37 (error).]
- Status as species: Roger, 1862c: 289; Roger, 1863b: 32, 49; Mayr, 1863: 453; Mayr, 1865: 108; Mayr, 1867a: 109 (redescription); Mayr, 1870b: 996 (in key); Smith, F. 1873: ix; Mayr, 1876: 111; Emery, 1878a: x (in list); Smith, F. 1879: 676; Forel, 1881: 10; Emery, 1883: 151; Forel, 1885b: 182; Mayr, 1886c: 365; Mayr, 1886d: 460; Cresson, 1887: 262; Emery, 1888c: 355; Emery, 1888e: 690; Rothney, 1889: 365; Emery, 1890a: 66; Emery, 1890b: 52; Forel, 1893g: 396; André, 1893b: 152; Dalla Torre, 1893: 76; Emery, 1893d: 89; Emery, 1893e: 191; Emery, 1893f: 243; Emery, 1893g: 266; Pergande, 1893: 35; von Jhering, 1894: 392; Emery, 1894k: 56; Forel, 1895b: 130; Emery, 1895c: 276; Emery, 1895k: 467; Emery, 1896g: 83 (in key); Emery, 1896h: 625; Mayr, 1897: 430; Forel, 1897b: 300; Forel, 1899c: 79; Emery, 1900d: 688; Emery, 1901f: 120; Emery, 1901g: 567; Forel, 1901c: 129; Rothney, 1903: 98; Bingham, 1903: 158; Wheeler, W.M. 1905b: 124; Emery, 1906c: 121; Forel, 1906d: 248; Forel, 1907e: 4; Forel, 1908b: 45; Forel, 1908c: 362; Forel, 1908e: 67; Wheeler, 1908a: 130; Wheeler, W.M. 1908e: 424; Wheeler, W.M. 1909b: 232; Forel, 1909a: 259, 268; Santschi, 1910c: 359; Wheeler, W.M. 1910g: 563; Santschi, 1911d: 3; Emery, 1911b: 531; Wheeler, W.M. 1911a: 23; Wheeler, W.M. 1911b: 169; Forel, 1912g: 4; Wheeler, W.M. 1913b: 493; Wheeler, W.M. 1913c: 115; Wheeler, W.M. 1913d: 240; Santschi, 1913c: 306; Stitz, 1913: 209; Forel, 1914e: 11; Bruch, 1914: 223; Emery, 1914f: 393; Wheeler, W.M. & Mann, 1914: 20; Mann, 1916: 447; Wheeler, W.M. 1916c: 3; Wheeler, W.M. 1916d: 324; Crawley, 1916b: 370; Wheeler, W.M. 1917g: 458; Luederwaldt, 1918: 42; Wheeler, W.M. 1918b: 24; Wheeler, W.M. 1919c: 272; Mann, 1920: 427; Emery, 1922e: 197; Wheeler, W.M. 1922a: 877; Wheeler, W.M. 1922c: 9; Mann, 1922: 30; Wheeler, W.M. 1923c: 4; Stitz, 1925: 119; Essig, 1926: 858; Stärcke, 1926: 84 (in key); Borgmeier, 1927c: 104; Wheeler, W.M. 1927b: 45; Creighton, 1930b: 59 (redescription); Menozzi & Russo, 1930: 158; Mukerjee, 1930: 154; Smith, M.R. 1930a: 3; Wheeler, W.M. 1932a: 10; Donisthorpe, 1932c: 463; Donisthorpe, 1933c: 534; Wheeler, W.M. 1933a: 62; Borgmeier, 1934: 102; Wheeler, W.M. 1935g: 26; Wheeler, W.M. 1936b: 200; Cole, 1937a: 99; Smith, M.R. 1937: 838; Wheeler, W.M. 1938: 252; Menozzi, 1942: 169; Eidmann, 1944: 450; Donisthorpe, 1946e: 31; Weber, 1948b: 82; Creighton, 1950a: 231; Smith, M.R. 1951a: 812; Chapman & Capco, 1951: 168; Cole, 1953g: 299; Smith, M.R. 1958c: 129; Kempf, 1961b: 507; Snelling, R.R. 1963: 7; Wilson, 1964b: 8; Baltazar, 1966: 260; Ettershank, 1966: 141; Smith, M.R. 1967: 357; Wilson & Taylor, 1967: 58; Taylor, 1967b: 1094; Kempf, 1972a: 235; Alayo, 1974: 14 (in key); Smith, D.R. 1979: 1385; Taylor, 1987a: 72; Zolessi, et al. 1988: 4; Deyrup, et al. 1989: 96; Brandão, 1991: 379; Ogata, 1991b: 110; Trager, 1991: 163 (redescription); Morisita, et al. 1992: 42; Collingwood, 1993b: 194; Perrault, 1993: 333; Dlussky, 1994: 54; Bolton, 1995b: 387; Wu, J. & Wang, 1995: 70; Tang, J., Li, et al. 1995: 71; Collingwood, Tigar & Agosti, 1997: 508; Tiwari, 1999: 58; Zhou, 2001b: 88; Wetterer, 2002: 129; Blard, et al. 2003: 131; Deyrup, 2003: 47; Imai, et al. 2003: 132; Lin & Wu, 2003: 66; Wetterer & Vargo, 2003: 417; Ghosh, et al. 2005: 33; Jaitrong & Nabhitabhata, 2005: 42; MacGown & Forster, 2005: 69; Clouse, 2007b: 249; Framenau & Thomas, 2008: 72; Terayama, 2009: 157; Mohanraj, et al. 2010: 7; Collingwood, et al. 2011: 438; Legakis, 2011: 15; Pfeiffer, et al. 2011: 51; Wetterer, 2011a: 21; Borowiec, L. & Salata, 2012: 534; Branstetter & Sáenz, 2012: 261; Guénard & Dunn, 2012: 53; Sarnat & Economo, 2012: 122; Sharaf & Aldawood, 2012: 10; Sarnat, et al. 2013: 72; Borowiec, L. 2014: 154; Ramage, 2014: 162; Bezděčková, et al. 2015: 122; Bharti, Guénard, et al. 2016: 44; Jaitrong, Guénard, et al. 2016: 38; Wetterer, et al. 2016: 17; Deyrup, 2017: 103; Salata & Borowiec, 2018c: 48; Fernández & Serna, 2019: 816; Lubertazzi, 2019: 172; Dias, R.K.S. et al. 2020: 90; Khachonpisitsak, et al. 2020: 122.
- Senior synonym of bahiaensis: Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of cephalotes: Roger, 1863b: 32, 49; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of clypeata: Roger, 1862c: 289; Mayr, 1863: 453; Roger, 1863b: 32; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of coloradensis: Mayr, 1886c: 365; Mayr, 1886d: 460; Cresson, 1887: 259; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of diabola: Ettershank, 1966: 141; Kempf, 1972a: 236; Smith, D.R. 1979: 1386; Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of drewseni: Mayr, 1870b: 996 (footnote); Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of eduardi: Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of galapageia: Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of glaber: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1899c: 79; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of innota: Wheeler, W.M. 1922a: 877; Trager, 1991: 164; Bolton, 1995b: 387.
- Senior synonym of laboriosus: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of laevissima: Donisthorpe, 1932c: 463; Trager, 1991: 163; Bolton, 1995b: 387.
- Senior synonym of lincecumii: Emery, 1895c: 276; Wheeler, W.M. 1902f: 28; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387.
- Senior synonym of mandibularis: Roger, 1862c: 289; Mayr, 1863: 453; Roger, 1863b: 32; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Wheeler, W.M. 1911f: 172; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of medusa: Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of mellea: Donisthorpe, 1932c: 455; Bolton, 1995b: 387.
- Senior synonym of nigra: Creighton, 1930b: 59; Kempf, 1972a: 236; Trager, 1991: 163; Bolton, 1995b: 387.
- Senior synonym of paleata: Roger, 1863b: 32, 49; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1895b: 130; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of perversa: Trager, 1991: 163; Bolton, 1995b: 388.
- Senior synonym of polita: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1899c: 79; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
- Senior synonym of rufa: Dalla Torre, 1893: 76; Ettershank, 1966: 141; Wilson & Taylor, 1967: 58; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Tiwari, 1999: 58; Zhou, 2001b: 88; Ramage, 2014: 162.
- Senior synonym of saxicola: Emery, 1895c: 276; Wheeler, W.M. 1902f: 28; Emery, 1922e: 197; Creighton, 1930b: 59; Borgmeier, 1927c: 104; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Bolton, 1995b: 387.
- Material of the nomen nudum minor referred here by Kempf, 1972a: 236.
- Distribution [tramp species]
  - Afrotropical: Cameroon, Congo, Democratic Republic of Congo, Equatorial Guinea, Gabon, Guinea, Liberia, Nigeria, Senegal, Sierra Leone, South Africa.
  - Austral: Australia, New Caledonia, New Zealand.
  - Malagasy: Madagascar.
  - Malesian: Brunei, Christmas I., Cocos-Keeling Is, Cook Is, Fiji, French Polynesia, Hawaii, Mariana Is, Micronesia, Malaysia, Marshall Is, Indonesia, Papua New Guinea, Palau, Philippines, Samoa, Singapore, Solomon Is, Tonga, Tuvalu, Vanuatu.
  - Nearctic: Canada, U.S.A.
  - Neotropical: Anguilla, Antigua, Aruba, Bahamas, Barbados, Barbuda, Belize, Bolivia, Bonaire, Brazil, Cayman Is, Colombia, Costa Rica (+ Cocos Is), Cuba, Curaçao, Dominica, Dominican Republic, Ecuador (+ Galapagos), El Salvador, French Guiana, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Jamaica, Martinique, Mexico (+ Revillagigedo Is), Montserrat, Nevis, Nicaragua, Panama, Peru, Puerto Rica, St Kitts, St Lucia, St Martin, St Vincent, Suriname, Trinidad, Turks & Caicos, Uruguay, Venezuela, Virgin Is.
  - Oriental: Bangladesh, China, India, Japan, Laos, Myanmar, Sri Lanka, Taiwan, Thailand, Vietnam.
  - Palaearctic: Britain, Cyprus, Greece, Italy, Netherlands, Saudi Arabia, Spain (Canary Is), United Arab Emirates.
- Current subspecies: nominal plus micans.
bahiaensis. Solenopsis edouardi var. bahiaensis Santschi, 1925d: 237 (w.) BRAZIL (Bahia), VENEZUELA.
- Type-material: 31syntype workers.
- Type-localities: 30 workers Brazil: Bahia (Bondar), 1 worker Venezuela (no further data).
- Type-depository: NHMB.
- [Misspelled as bahiana by Borgmeier, 1927c: 104.]
- Junior synonym of medusa: Creighton, 1930b: 68; Kempf, 1972a: 236.
- Junior synonym of geminata: Trager, 1991: 163; Bolton, 1995b: 388.
cephalotes. Solenopsis cephalotes Smith, F. 1859a: 149 (s.w.) INDONESIA (Aru Is).
- Type-material: 3 syntype workers.
- Type-locality: Indonesia: Aru Is (A.R. Wallace).
- Type-depository: OXUM.
- Status as species: Smith, F. 1860b: 113; Smith, F. 1861b: 48; Smith, F. 1863: 21; Smith, F. 1871a: 333.
- Junior synonym of saevissima: Mayr, 1863: 454.
- Junior synonym of rufa: Forel, 1911e: 268; Emery, 1922e: 197; Donisthorpe, 1932c: 456; Creighton, 1950a: 231.
- Junior synonym of geminata: Roger, 1863b: 32, 49; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 386; Zhou, 2001b: 88.
clypeata. Atta clypeata Smith, F. 1858b: 169 (q.m.) MEXICO (no state data).
- Type-material: 3(?) syntype queens, 1 syntype male.
- Type-locality: Mexico (no further data).
- Type-depository: BMNH.
- Status as species: Norton, 1868a: 66.
- Junior synonym of geminata: Roger, 1862c: 289; Mayr, 1863: 453; Roger, 1863b: 32; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 386; Zhou, 2001b: 88.
coloradensis. Atta coloradensis Buckley, 1867: 346 (s.w.) U.S.A. (Texas).
- Type-material: syntype workers (number not stated).
- Type-locality: U.S.A.: Texas, nr Colorado river (S.B. Buckley).
- Type-depository: unknown (no material known to exist).
- [Note: Wheeler, W.M. 1902f: 29, comments that this taxon contains a mixture of Solenopsis geminata and a species of Pheidole.]
- Junior synonym of geminata: Mayr, 1886c: 365; Mayr, 1886d: 460; Cresson, 1887: 259; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
diabola. Solenopsis geminata var. diabola Wheeler, W.M. 1908e: 424 (w.q.m.) U.S.A. (Texas, Arizona, California).
- Type-material: syntype workers, syntype queens, syntype males (numbers not stated).
- Type-localities: U.S.A.: Texas, Montopolis, Austin, Lampasas, and Langtry (W.M. Wheeler). Texas, Paris (A. Rucker), Texas, Dallas (W.D. Hunter), Texas, Granite Mt (H.W. Long), Texas, Plano (E.S. Tucker), Arizona, Tempe (W.M. Wheeler), California, Needles (W.M. Wheeler).
- Type-depository: MCZC.
- Subspecies of geminata: Forel, 1908c: 362; Forel, 1909a: 250; Wheeler, W.M. 1909b: 232; Wheeler, W.M. 1910g: 563; Forel, 1912g: 4; Wheeler, W.M. 1915b: 397; Luederwaldt, 1918: 43; Emery, 1922e: 197; Borgmeier, 1927c: 105.
- Junior synonym of rufa: Creighton, 1930b: 66; Creighton, 1950a: 231; Smith, M.R. 1951a: 812.
- Junior synonym of geminata: Ettershank, 1966: 141; Kempf, 1972a: 236; Smith, D.R. 1979: 1386; Trager, 1991: 163; Bolton, 1995b: 387.
drewseni. Diplorhoptrum drewseni Mayr, 1861: 73 (diagnosis in key) (w.) ITALY.
- Type-material: syntype workers (number not stated).
- Type-locality: Italy: (no further data) (Drewsen).
- Type-depository: NHMW.
- Combination in Solenopsis: Mayr, 1863: 453.
- Status as species: Mayr, 1863: 453; Dours, 1873: 170; André, 1874: 200 (in key).
- Junior synonym of geminata: Mayr, 1870b: 996 (footnote); Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 387; Zhou, 2001b: 88.
eduardi. Solenopsis eduardi Forel, 1912g: 12 (w.) COLOMBIA.
- Type-material: syntype workers (number not stated).
- Type-locality: Colombia: Rio Frio (A.Forel).
- Type-depository: MHNG.
- [Misspelled as edouardi by Santschi, 1923c: 263, and others.]
- Status as species: Emery, 1922e: 197; Santschi, 1923c: 263; Santschi, 1925b: 13; Borgmeier, 1927c: 104; Ettershank, 1966: 140 (error).
- Subspecies of geminata: Creighton, 1930b: 67; Santschi, 1931c: 271; Kempf, 1972a: 236.
- Junior synonym of geminata: Trager, 1991: 163; Bolton, 1995b: 387.
galapageia. Solenopsis geminata var. galapageia Wheeler, W.M. 1919c: 272 (w.q.) ECUADOR (Galapagos Is).
- Type-material: syntype workers, syntype queens (numbers not stated, “several”).
- Type-locality: Ecuador: Galapagos Is, Charles I., 1905-6 (F.X. Williams).
- Type-depositories: CASC, MCZC.
- Subspecies of geminata: Creighton, 1930b: 65; Wheeler, W.M. 1935g: 26; Ettershank, 1966: 141; Linsley & Usinger, 1966: 175; Kempf, 1972a: 236.
- Junior synonym of geminata: Trager, 1991: 163; Bolton, 1995b: 387.
glaber. Myrmica glaber Smith, F. 1862b: 34 (w.) PANAMA.
- Type-material: holotype (?) worker.
- [Note: no indication of number of specimens is given.]
- Type-locality: Panama: (no further data) (R.W. Stretch).
- Type-depository: BMNH.
- Combination in Solenopsis: Roger, 1863b: 32.
- Status as species: Roger, 1863b: 32; Mayr, 1863: 432.
- Junior synonym of geminata: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1899c: 79; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 388; Zhou, 2001b: 88.
innota. Solenopsis geminata var. innota Santschi, 1915c: 257, fig. 6 (s.w.q.m.) GABON, LIBERIA, CONGO.
- Type-material: syntype workers, syntype queens, syntype males (numbers not stated).
- Type-localities: Gabon: Samkita, 1914 (F. Faure), Liberia: Monrovia (Delafosse), Congo: Ngoma (Galli-Valerio).
- Type-depositories: MNHN, NHMB.
- Subspecies of geminata: Emery, 1922e: 197.
- Junior synonym of geminata: Wheeler, W.M. 1922a: 877; Trager, 1991: 164; Bolton, 1995b: 388.
laboriosus. Crematogaster laboriosus Smith, F. 1860b: 109 (q.) INDONESIA (Bacan I.).
- Type-material: holotype queen.
- Type-locality: Indonesia: Bachian (= Bacan I.), “Bac.23” (A.R. Wallace).
- Type-depository: OXUM.
- Combination in Solenopsis: Mayr, 1863: 453.
- Status as species: Roger, 1863b: 37.
- Junior synonym of rufa: Emery, 1922e: 197; Creighton, 1930b: 66; Creighton, 1950a: 231; Donisthorpe, 1932c: 463.
- Junior synonym of geminata: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Emery, 1922e: 197; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 388; Zhou, 2001b: 88.
laevissima. Myrmica laevissima Smith, F. 1860b: 108 (w.) INDONESIA (Bacan I.).
- Type-material: 2 syntype workers.
- Type-locality: Indonesia: Bachian (= Bacan I.), “Bac.7”, “found in houses” (A.R. Wallace).
- Type-depository: OXUM.
- [Misspelled as levissima by Dalla Torre, 1893: 111.]
- Status as species: Mayr, 1863: 433; Smith, F. 1871a: 325; Dalla Torre, 1893: 111; Wheeler, W.M. 1918b: 24; Chapman & Capco, 1951: 126.
- Junior synonym of geminata: Donisthorpe, 1932c: 463; Trager, 1991: 163; Bolton, 1995b: 388.
lincecumii. Atta lincecumii Buckley, 1867: 344 (s.w.) U.S.A. (Texas).
- Type-material: syntype workers (number not stated).
- Type-locality: U.S.A.: Texas, Central Texas, near streams (S.B. Buckley).
- Type-depository: unknown (no type-material is known to exist).
- Combination in Aphaenogaster: Cresson, 1887: 260.
- Status as species: Cresson, 1887: 260.
- Junior synonym of geminata: Emery, 1895c: 276; Wheeler, W.M. 1902f: 28; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 388.
mandibularis. Solenopsis mandibularis Westwood, 1840b: 87, pl. 2, fig. 5 (w.) “America” (no state data).
- Type-material: syntype workers (number not stated).
- Type-locality: "America Aequinoctiali": (no further data) (D.L. Guilding).
- Type-depository: OXUM.
- Status as species: Smith, F. 1858b: 178.
- Junior synonym of geminata: Roger, 1862c: 289; Mayr, 1863: 453; Roger, 1863b: 32; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Wheeler, W.M. 1911f: 172; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 389; Zhou, 2001b: 88.
medusa. Solenopsis geminata subsp. medusa Mann, 1916: 447, pl. 4, fig. 31 (w.) BRAZIL (Rio Grande do Norte, Ceará).
- Type-material: syntype workers (numbers not stated, “a number of colonies”).
- Type-localities: Brazil: Rio Grande do Norte, Ceará-Mirim, 1911 (W.M. Mann), Brazil: Ceará, Maranguapé Mts, 1911 (W.M. Mann).
- Type-depositories: LACM, MCZC.
- [Solenopsis geminata subsp. medusa Wheeler, W.M. 1915b: 397. Nomen nudum (attributed to Mann).]
- Creighton, 1930b: 69 (q.).
- Subspecies of geminata: Emery, 1922e: 197; Borgmeier, 1927c: 105; Creighton, 1930b: 68; Ettershank, 1966: 142; Kempf, 1972a: 236.
- Junior synonym of geminata: Trager, 1991: 163; Bolton, 1995b: 389.
mellea. Myrmica mellea Smith, F. 1859a: 148 (w.) INDONESIA (Aru Is).
- Type-material: holotype worker.
- Type-locality: Indonesia: Aru Is, “Aru” (A.R. Wallace).
- Type-depository: OXUM.
- [Misspelled as mellae by Chapman & Capco, 1951: 127.]
- Status as species: Mayr, 1863: 433; Smith, F. 1871a: 325; Dalla Torre, 1893: 112.
- Junior synonym of geminata: Donisthorpe, 1932c: 455; Bolton, 1995b: 389.
nigra. Solenopsis geminata var. nigra Forel, 1908b: 45 (w.) COSTA RICA.
- Type-material: syntype workers (number not stated).
- Type-locality: Costa Rica: Zent (P. Biolley).
- Type-depository: MHNG.
- Subspecies of geminata: Forel, 1909a: 268; Forel, 1913l: 225; Wheeler, W.M. 1915b: 397; Emery, 1922e: 197; Menozzi, 1927c: 268; Santschi, 1930e: 78; Menozzi, 1931b: 267; Santschi, 1939f: 162; Alayo, 1974: 34.
- Junior synonym of geminata: Creighton, 1930b: 59; Kempf, 1972a: 236; Trager, 1991: 163; Bolton, 1995b: 389.
paleata. Myrmica paleata Lund, 1831a: 116 (footnote) (w.) BRAZIL (Minas Gerais).
- Type-material: syntype workers (number not stated, “numerous”).
- Type-locality: Brazil: Minas Gerais (Lund).
- Type-depository: ZMUC.
- [Also described as new by Lund, 1831b: 100.]
- Junior synonym of geminata: Roger, 1863b: 32, 49; Mayr, 1865: 108; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1895b: 130; Trager, 1991: 163; Bolton, 1995b: 390; Zhou, 2001b: 88.
perversa. Solenopsis edouardi var. perversa Santschi, 1925b: 13 (s.w.q.) BRAZIL (Pernambuco).
- Type-material: syntype workers, syntype queens (numbers not stated).
- Type-locality: Brazil: Pernambuco, Tapera (no collector’s name, “sent by R.P. Wasermann”).
- Type-depository: NHMB.
- Subspecies of eduardi: Borgmeier, 1927c: 104.
- Junior synonym of eduardi: Creighton, 1930b: 67; Kempf, 1972a: 236; Bolton, 1995b: 390.
polita. Myrmica polita Smith, F. 1862b: 34 (w.) PANAMA.
- Type-material: holotype (?) worker.
- [Note: no indication of number of specimens is given.]
- Type-locality: Panama: (no further data) (R.W. Stretch).
- Type-depository: BMNH.
- [Unresolved junior primary homonym of Myrmica polita Smith, F. 1860b: 108 (Bolton, 1995b: 390).]
- Combination in Solenopsis: Roger, 1863b: 32.
- Status as species: Roger, 1863b: 32; Mayr, 1863: 434.
- Junior synonym of geminata: Mayr, 1863: 453; Mayr, 1886c: 362; Mayr, 1886d: 460; Dalla Torre, 1893: 76; Pergande, 1893: 35; Forel, 1899c: 79; Emery, 1922e: 197; Borgmeier, 1927c: 104; Creighton, 1930b: 59; Creighton, 1950a: 231; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 390; Zhou, 2001b: 88.
rufa. Atta rufa Jerdon, 1851: 106 (w.q.) INDIA (Kerala, Karnataka).
- Type-material: syntype workers, syntype queens (numbers not stated).
- Type-locality: India: “very common in Malabar, but is also found in the Carnatic”…..”often appears in houses” (T.C. Jerdon).
- Type-depository: unknown (no type-material known to exist).
- [Duplicated in Jerdon, 1854a: 48.]
- Bingham, 1903: 158 (m.).
- Combination in Solenopsis: Emery, 1892b: 166.
- Status as species: Smith, F. 1858b: 163; Mayr, 1863: 397.
- Subspecies of geminata: Forel, 1899a: 119; Forel, 1901b: 14; Bingham, 1903: 159; Forel, 1903a: 689; Forel, 1903d: 405; Wheeler, W.M. 1907a: 272; Forel, 1908a: 3; Wheeler, W.M. 1908c: 165; Forel, 1909a: 268; Forel, 1909e: 394; Wheeler, W.M. 1909d: 340; Forel, 1910d: 123; Wheeler, W.M. 1910g: 563; Forel, 1911e: 268; Wheeler, W.M. 1912a: 45; Forel, 1913k: 55; Emery, 1914f: 412; Crawley, 1915a: 135; Crawley, 1915b: 239; Wheeler, W.M. 1915b: 397; Viehmeyer, 1916b: 285; Santschi, 1919a: 326; Wheeler, W.M. 1919e: 84; Santschi, 1920h: 161; Emery, 1922e: 197; Santschi, 1924c: 99; Crawley, 1924: 399; Stitz, 1925: 119; Wheeler, W.M. 1927b: 45; Wheeler, W.M. 1927e: 1; Wheeler, W.M. 1927h: 90; Cheesman & Crawley, 1928: 518; Santschi, 1928h: 125; Wheeler, W.M. 1928c: 20; Creighton, 1930b: 66; Menozzi, 1930d: 327; Smith, M.R. 1930a: 3; Wheeler, W.M. 1930h: 68; Wheeler, W.M. 1932a: 10; Wheeler, W.M. 1932d: 16; Santschi, 1932b: 14; Wheeler, W.M. 1934h: 12; Donisthorpe, 1935: 633; Karavaiev, 1935a: 94; Wheeler, W.M. 1935g: 26; Wheeler, W.M. 1936f: 8; Cole, 1937a: 99; Creighton, 1950a: 231; Smith, M.R. 1951a: 812; Chapman & Capco, 1951: 168; Baltazar, 1966: 260.
- Junior synonym of geminata: Dalla Torre, 1893: 76; Ettershank, 1966: 141; Wilson & Taylor, 1967: 58; Kempf, 1972a: 235; Smith, D.R. 1979: 1385; Trager, 1991: 163; Bolton, 1995b: 390; Tiwari, 1999: 57; Zhou, 2001b: 88; Ramage, 2014: 162.
saxicola. Myrmica (Monomorium) saxicola Buckley, 1867: 341 (w.) U.S.A. (Texas).
- Type-material: syntype workers (number not stated).
- Type-locality: U.S.A.: Texas, Buchanan County (S.B. Buckley).
- Type-depository: unknown (no type-material is known to exist).
- Combination in Monomorium: Cresson, 1887: 262.
- Status as species: Cresson, 1887: 262; Dalla Torre, 1893: 116.
- Junior synonym of geminata: Emery, 1895c: 276; Wheeler, W.M. 1902f: 28; Emery, 1922e: 197; Creighton, 1930b: 59; Borgmeier, 1927c: 104; Smith, M.R. 1951a: 812; Smith, D.R. 1979: 1385; Bolton, 1995b: 391.

Type Material

Atta geminata Fabricius, 1804: Syntype, 2 queens, Central America, Zoologisk Museum, University of Copenhagen.

The following notes on F. Smith type specimens have been provided by Barry Bolton (details):

Crematogaster laboriosus

Holotype queen in Oxford University Museum of Natural History. Labelled “Bac. 23.”

Myrmica laevissima

Two worker syntypes in Oxford University Museum of Natural History. Labelled “Bac. 7.”

Myrmica mellea

Holotype worker in Oxford University Museum of Natural History. Labelled “Aru.”

Solenopsis cephalotes

Three worker syntypes (on a single card) in Oxford University Museum of Natural History. Labelled “Aru.” (= Aru I. New Guinea).

Two specimens in Oxford University Museum of Natural History, labelled by Donisthorpe as syntypes of cephalotes, have “Men.” (= Menado, Sulawesi) as their locality. Smith gives the type-locality as “Aru.” All the specimens, from both localities, appear to be S. geminata (Fabricius).

Description

Worker

Trager (1991) - MEASUREMENTS AND INDICES: HL 1.06-2.20, HWO.98-2.33, SLO.78-1.l4, EL 0.15-0.29, PW 0.57-1.06, AL 1.18-2.08, CI 92-108, SI 47-84, 01 11-16. N = 34.

WORKER DIAGNOSIS. Head (ffv) subquadrate to subtrapezoidal (sides often divergent or flaring anteriorly, especially in specimens from southern Central America and eastern South America), with sides straight to weakly convex and parallel to weakly divergent anteriad (sides weakly convergent anteriad in specimens from southern Texas), often slightly indented just anterior to eyes; posterior border with deep angular median emargination between two nearly hemispherical lobes ("temples"); emargination 1.0-1.5 x as wide as distance between apices of frontal lobes; median clypeal tooth lacking or (rarely) rudimentary; carinal teeth thick at base, strongly protruding, clypeal border between them concave; mandibles thick and strongly curved mesad, especially in largest individuals; mandibular teeth present in all individuals upon eclosion, but often worn off through seed-milling by larger individuals, such that apices dulled or flattened; mandibular costulae complete in smaller majors, to irregular and largely obsolete in larger majors; eye (lv) appearing small relative to hypertrophied head, greatest diameter with 9-11 facets, least diameter with 7-9; largest majors rarely with median ocellus more or less well developed; scapes (ffv) short, curved, scape failing to reach apices of occipital lobes by 0.3-0.5 x SL; pronotum with rounded, at most faintly angular anterolateral corners; promesonotal suture conspicuous, approximately right-angular to weakly obtuse-angular, raised as a small boss at most anterior point; promesonotal profile (lv) formed of 2 convexities meeting at anterior mesonotal boss, pronotal profile more strongly convex and at most feebly angular; anteroventral border of mesopleuron thickened, often bearing one or more spine-like, triangular, lobate or rectangular projecting flanges; metanotal impression marked, set off by a ridge at its juncture with propodeum; propodeal profile more or less diamond-shaped, with dorsum flat to weakly concave; descending though obtuse, carinate angles to weakly convex declivous face; petiolar peduncle as long as or a little longer than base of node; profile of petiolar node cuneate with a relatively sharp crest; postpetiole 1.02-1.08 x as wide as petiole.

Piligerous foveolae of head and thoracic dorsum conspicuous and abundant, 0.025 or more in diameter, those near mouthparts and on sides ofhead sometimes elongate; on larger specimens, mesopleuron largely unsculptured to feebly rugose, but coarsely rugose along pleural suture and near edges of sclerite, especially anteroventrally (in smaller specimens, mesopleuron striate-punctate to coarsely rugose); dorsum of propodeum with a pair of irregular dorsolateral carinae, these best developed at juncture of dorsal and declivous faces; posteriorly, transverse striae or rugae may occur on dorsal, concave surface between carinae; area surrounding propodeal spiracle encircled by coarse, irregular rugosity; declivous face of propodeum with transverse rugae contiguous with those of metapleuron on lower portion, but on upper part more neatly aligned than, and not always contiguous with those on side of propodeum; lateral carinae usually obsolescent on all but uppermost portion of propodeal declivous face; petiolar peduncle transversely striate; base of node areolate-punctate; petiolar ventral process consisting of 1 or 2 small teeth, or rarely, a very narrow, transparent flange; dorsum and anterior face of petiolar node sparsely punctate foveolate, sometimes dorsum with transverse striation like that on posterior face, dorsal margin weakly scalloped; posterior face of petiolar node transversely striate to weakly rugose-areolate below, sparsely sculptured, or less often sculptured as below near top, though less coarsely; sides of postpetiole rugose-punctate; venter of postpetiole dull, coarsely punctate; dorsum ofpostpetiole weakly scalloped, usually shiny and unsculptured or with a weaker version of sculpture below; posterior face of postpetiole transversely rugose-punctate.

Pilosity of head and promesonotum abundant, 0.13--0.37 mm in length; some pilosity often present on meso- and metapleuron.

Color highly variable, though generally fairly consistent within a colony; ranging from concolorous orange-red with only posterior portion of gaster dark brown (var. rufa), to nearly concolorous brownish black with only head near base of mandibles and appendages (especially distally) reddish-brown (var. nigra). Smaller workers tend to be darker and more uniformly colored than bigger ones. Darker S. geminata are possibly limited to or at least prefer more humid microhabitats, and ecological conditions during rearing may be at least partly responsible for adult coloration, but this needs study. Redder variants often are, or at least appear less sculptured than darker forms, but are more likely to have mesopleural flanges. However, I have studied samples from single colonies with virtually the entire range of color and sculpture described above, and S. geminata individuals may have any possible combination of color and sculpture.

Queen

Creighton (1930) - Length 7.5-8 mm.

Head, exclusive of the mandibles, one-sixth broader than long, quadrate, a little wider behind the eyes than in front of them, the sides very feebly convex from the eyes to the occipital angles, straight or nearly straight in front of the eyes and meeting the anterior border of the head at a sharp angle. Occipital angles well-marked, the occiput flat with a narrow and shallow median impression, occipital furrow clearly defined, frontal furrow short, clearly marked only for about half the distance from the median ocellus to the base of the frontal lobes, thereafter becoming shallow and indistinct. Ocelli large and prominent. Clypeus feebly projecting, carinal teeth very stout and rather blunt, the edge of the clypeus between them with a shallow concave impression ; lateral denticles small, often poorly defined and in some cases represented only by a sinuousity in the edge of the clypeus. Mandibles strongly bent but less so than in the major worker, the masticatory border with three large teeth and usually the rudiment of a fourth. Eyes large, strongly convex, irregularly oval in outline, their posterior border reaching a point half way between the occiput and the anterior border of the head. The antennal scape in repose just reaches the lateral ocellus. Funicular joints and club as in the major worker.

Thorax robust, elliptical, its maximum width three-fifths of its length, only slightly narrower than the head (the eyes excluded). Seen in profile the mesonotum shows a straight posterior half and a convex anterior portion which overhangs the pronotum. Scutellum as high as the mesonotum, slightly convex with a short, perpendicular posterior face. Angle of the epinotum well-defined but very obtuse, the basal and declivious faces of about equal length. Mesosternum large and subglobose beneath.

Petiolar nodes very similar to those of the major worker except that the peduncle is thicker, the node of the petiole slightly lower and the postpetiole bears on either side an obtuse, somewhat conical, ventral projection with a small opening at its summit (this condition is sometimes found in the major worker but in that caste the conical projection is usually absent and the opening occurs as a small tubercle on the side of the node). Seen from above the nodes are very strongly transverse and of approximately equal width. Abdomen as in the major worker. Wings hyaline with yellow veins.

Punctures smaller and less numerous than in the major worker. Somewhat larger on the head than on the thorax and abdomen. Body hairs long, golden and erect, somewhat longer on the head than elsewhere, longest on the anterior edge of the clypeus. Mandibles with a few coarse, indistinct striae, epinotuin almost completely covered with fine wavy striae, petiolar nodes, except their summits which are shining, striato-rugulose. For the rest smooth and shining. The color varies from a clear yellowish brown with the front of the head, the mesosternum and the appendages paler and the mandibles and the posterior half of the abdomen castaneous, to a deep castaneous brown with only the extreme anterior portion of the head yellowish brown.

Male

Creighton (1930) - Length 5.8 mm.

Head trapezoidal, its maximum width (including the eyes) approximately one-fourth greater than its length. Eyes very large, strongly convex and oval in outline, occupying more than one-half the. side of the head, their anterior border reaching the insertion of the mandible. Ocelli very large and prominent, the lateral ocelli which mark the boundary of the occiput with a shallow concave impression between them. Anterior edge of the clypeus approximately straight; seen from the side the clypeus shows a blunt, beak-like central lobe. Mandibles small, linear, bidentate. Antennal scape about one and one-half times as long as broad, roughly cylindrical ; first funicular joint sub globose, broader than the scape or the following joint; second funicular joint more than twice as long as broad, third joint one and one-half times as long as broad, the remaining joints all more than twice as long as broad and progressively decreasing in width.

Thorax bulky, elliptical, its greatest width two-thirds of its length, only slightly less than twice as wide as the head (eyes included). Seen from the side the anterior part of the mesonotum is greatly swollen and overhangs the pronotum which is so much displaced that the head of the insect appears to be attached to the ventral surface of the thorax. Epinotum rather rounded, the basal face strongly convex transversely and slightly convex longitudinally, declivious face flat and virtually perpendicular. Node of the petiole in profile low but*with an acute summit, the anterior face not sharply separated from the thick peduncle, the posterior face perpendicular. Seen from behind the summit of the node shows a broad, shallow median impression. Postpetiole in profile as high as the node of the petiole, about one and one-half times as high as long with a long, backward sloping anterior face, a rounded summit and a very declivious posterior face. The conical lateral projections are even stronger than in the female. Seen from above both nodes are very transverse, the postpetiole is approximately three times as broad as long· and one-sixth wider than . he node of the petiole. First gastric segment truncate at the base but not impressed. Wings hyaline, the veins clear yellow.

Punctures fine and fairly numerous, the hairs which they bear long, thin, golden, erect or sub erect and of uniform length over the body, those on the legs shorter and stiffer; antennae without long hairs but clothed with a dense short pubescence. Base of the epinotum, area between the eye and the insertion of the antenna and the area between the ocelli stria to-granulate. Base of the petiolar nodes granulate. For the rest smooth and shining. Color yellowish brown to piceous brown, the antennae and legs pale yellow.

Karyotype

See additional details at the Ant Chromosome Database.

Explore: Show all Karyotype data or Search these data. See also a list of all data tables or learn how data is managed.

2n = 32, karyotype = 26M+6A (India) (Imai et al., 1984).
n = 16, 2n = 32 (USA) (Crozier, 1970b).
n = 16, 2n = 32, karyotype = 14M+12SM+6ST (French Guiana) (Aguiar et al., 2020).

Worker Morphology

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Caste: polymorphic

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