Odontomachus hastatus

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Odontomachus hastatus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Odontomachus
Species: O. hastatus
Binomial name
Odontomachus hastatus
(Fabricius, 1804)

Odontomachus hastatus casent0040150 p 1 high.jpg

Odontomachus hastatus casent0040150 d 1 high.jpg

Specimen Labels

Synonyms

A large (~13 mm) and aggressive arboreal ant that forages nocturnally.

Identification

The lone member of the Odontomachus hastatus group.

Posterior third to half of dorsal surface of head smooth and shining; large species (head length including mandibles greater than 2.8mm)...(from Longino Ants of Costa Rica)

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 16.32° to -64.36°.

     
North
Temperate 		North
Subtropical 		Tropical South
Subtropical 		South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Guyana, Panama, Peru, Suriname.

Distribution based on AntMaps

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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.
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Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.
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Biology

Much of what follows is from or is based on Camargo and Oliveira 2012 and Oliveiera et al. 2011.

Camargo RX, Oliveira PS. 2012. Figure 1. (A) General view of two clumped epiphytic bromeliads (Vriesia) in the sandy forest of Cardoso Island, southeast Brazil; Odontomachus hastatus uses the epiphytes’ root mass as nesting site for the colony. (B) Returning forager of Odontomachus hastatus with a recently–captured termite in the mandibles. Photographs courtesy of Pedro Rodrigues.

From the abstract of Camargo and Oliveira (2012): This study documents the nesting and foraging ecology of a large (~13 mm total length) arboreal trap–jaw ant, Odontomachus hastatus (Fabricius) in a sandy plain forest on Cardoso Island, off the coast of Southeast Brazil. The results showed that O. hastatus nested in root clusters of epiphytic bromeliads, most commonly Vriesea procera (70% of nest plants). Mature O. hastatus colonies include one to several queens and about 500 workers. Foraging by O. hastatus is primarily nocturnal year–round, with increased foraging activity during the wet/warm season. The foragers hunt singly in the trees, preying on a variety of canopy–dwelling arthropods, with flies, moths, ants, and spiders accounting for > 60% of the prey captured. Although predators often have impacts on prey populations, the ecological importance of O. hastatus remains to be studied.

From the abstract of Oliveira et al. (2011): Queen number per colony is positively correlated with nesting space (root cluster of epiphytic bromeliads), and larger nest sites host larger ant colonies. Plant samplings revealed that suitable nest sites are limited and that nesting space at ant-occupied bromeliads differs in size and height from the general bromeliad community. Dissections revealed that queens in polygynous colonies are inseminated, have developed ovaries, and produce eggs. Behavioral observations showed that reproduction in polygynous colonies is mediated by queen–queen agonistic interactions that include egg cannibalism. Dominant queens usually produced more eggs. Field observations indicate that colonies can be initiated through haplometrosis.

Figure 2. Foraging activity of Odontomachus hastatus colonies in the dry/cold (August) and wet/warm season (February), on Cardoso Island, southeast Brazil. Ant activity and air temperature were evaluated at two–hour intervals. The arrows indicate sunrise (white) and sunset (grey).
Figure 2. Figure 3. (A) Frequency distribution of different types of prey captured by Odontomachus hastatus foragers, and (B) of their dry weights, in the sandy forest of Cardoso Island, southeast Brazil. Data are based on collections from returning ants of two focal colonies, during the peak of their foraging activity (17:30 to 23:00).

Foraging/Diet

Individual foragers of O. hastatus searched for food usually in the canopy of the tree hosting the nest bromeliad. Hunters frequently used climbing lianas as bridges to go from tree to tree in the forest canopy, or to search for prey on lower plants (Figure 1). O. hastatus was never observed searching for food on the ground.

Foraging activity typically begins at dusk around 17:30 and peaks near 20:00 (Figure 2). At sunset, individual foragers depart from nest bromeliads to hunt for prey among foliage. Typically as the first workers return with newly–captured prey, more ants tend to leave the nest. Foraging ceases at dawn between 06:00 and 08:00. The foraging rhythm is predominantly nocturnal throughout the whole year, with a marked increase in the overall worker activity in the wet/warm compared to the dry/cold season.

From a total of 102 food items registered as part of the diet of two colonies of O. hastatus, canopy–dwelling arthropods comprised the vast majority of the items retrieved by ant foragers in the study area (Figure 3A). The most representative prey groups were dipterans (adults), lepidopterans (larvae and adults), ants (workers and winged forms), and spiders, which together accounted for over 60% of the prey captured. Odontomachus hastatus is a typical generalist predator, with the vast majority of the prey consisting of organisms captured alive (88% of the identified animal items), most of which of dry weight < 2.0 mg (Figure 3B).

Foragers will feed from canned sardines placed on vegetation, and followed back to their nests.

Colony Attributes

Collected colonies of O. hastatus contained 35 to 536 workers (291.2 ± 163.0 workers; N =19 colonies), and approximately half of the colonies had more than one dealated queen (4.0 ± 3.7 queens; range 1-12; n = 18 queenright colonies).

Nesting Habits

Arboreal O. hastatus nests in root clusters of epiphytic bromeliads at Cardoso Island, with Vriesea procera accounting for nearly 70% of the nest plants recorded.

All colonies nested among root clusters of single or clumped epiphytic bromeliads 1.5 to 4.6 m above ground (2.2 ± 1.2 m; N = 45) (see Figure 1). The species of Bromeliaceae most frequently used by O. hastatus for nesting were Vriesea procera (73%; 33/45 nests), followed by Aechmea spp. (13%), and Quesnelia arvensis and Vriesea sp. (7% each). The ants used V. procera opportunistically, since this plant species accounted for 80% of the epiphytic bromeliads sampled in the study area (Oliveira et al. 2011).

Gibernau et al. 2011 - The relationship between ants and Philodendron insigne, a trash-basket epiphyte abundant along streams, was studied in French Guiana. Only a few (3%) of the young plants sheltered ants, whereas 90% of the mature individuals did. The most frequent associate was Odontomachus hastatus, and its nests were almost entirely (94.4%) located in P. insigne root clusters. Experimental choice tests conducted on O. hastatus workers confirmed their preference for P. insigne. We propose that the interactions between P. insigne and ants may be intermediate between non-obligatory, reward-based interactions and obligatory, specific ant–myrmecophyte interactions because (1) almost all mature P. insigne individuals are associated with ants; (2) O. hastatus is the most frequent when diverse ants nest in its root clusters; (3) ants colonize mature P. insigne, but rarely young individuals; (4) ants, particularly O. hastatus, protect the foliage of their host; and (5) at least one ant species, O. hastatus, prefers P. insigne over other host plants. The latter relationship is asymmetrical because P. insigne is inhabited by diverse ants whereas O. hastatus nests almost exclusively in P. insigne.

Reproduction

Our field data with bromeliad-nesting Odontomachus hastatus at Cardoso Island showed that queen number varies widely among colonies and is positively correlated with nesting space (root cluster), and that larger nest sites host larger ant colonies. Samplings of epiphytic bromeliads further showed that suitable nest sites are limited and that ant-occupied plants differ in two traits (size and height of nesting space) from the general bromeliad community. Dissection data revealed that several (if not all) nestmate queens in polygynous colonies of O. hastatus are inseminated, have developed ovaries, and produce eggs. Observations in captivity strongly suggest that egg production per queen in polygynous colonies tends to be lower compared to a solitary queen in a monogynous colony. Indeed behavioral data further confirmed that reproduction is unequally shared in polygynous colonies, and is mediated by stereotyped queen–queen agonistic interactions that may escalate to overt aggression, particularly toward egg-layers, and destruction of newly laid eggs. Those queens with better performances during domination contests usually produced more eggs. While opening the nest plants we found no evidence that dealated queens of O. hastatus were spaced out within root clusters (i.e., located in different cavities), which supports our observations of rival queens sharing the same chambers in captivity and suggests that oligogyny may not occur in this species.

So far we are not certain whether polygyny in this species results from groups of cofounding queens (pleometrosis) or from adoption of newly mated queens by established colonies (secondary polygyny). Indeed both mechanisms can reasonably occur in facultatively polygynous O. hastatus: when nest sites are limited, queen number can increase through a rise in queen adoptions by established colonies (e.g., Herbers, 1986; Hannonen et al., 2004), or through an increase in foundress associations (e.g., D’Ettorre et al., 2005; Feldhaar et al., 2005). In August 2002 we found an incipient colony of O. hastatus with only 3 workers, 6 eggs and a single dealated queen, indicating that this species establishes new colonies through haplometrosis as also reported by Gibernau et al. (2007) in French Guiana. The fact that queen number and colony size (number of workers) were positively correlated in O. hastatus may suggest that inseminated queens are added as the colony ages.

Behavior

Agonistic interactions among coexisting queens of O. hastatus entailed a series of stereotyped displays ranging from antennation bouts to overt aggression with typical mandibular strikes; the ant initiating the encounter normally won it. An aggressive encounter usually begins with the frontal approach by one queen (dominant) followed by a sequence of vigorous antennal drumming on the head, antennae or legs of the opponent (subordinate). The dominant queen usually stands over the opponent who typically lowers the body, backs the antennae, and closes the mandibles (Fig. 4). The contest may last from a few seconds to 4 min, and typically terminates with the subordinate queen walking away in the opposite direction as the aggressor vigorously antennates its gaster. More rarely, however, the contest may escalate to a true fight and rival queens may lock their mandibles or even pull one another by the antennae, which on one occasion caused mutilation of the appendage. Most queen–queen agonistic interactions occurred near the egg pile, with the subordinate queen typically leaving the surrounding area after the contest. Aggression by queens towards workers was also observed and followed the same behavioral pattern described for queen–queen contests.

Association with other organisms

  • This species is a host for the phorid fly Apocephalus catholicus (a parasite) (Brown et al., 2015) (injured).
  • This species is a host for the phorid fly Apocephalus catholicus (a parasite) (phorid.net) (attacked).
  • This species is a host for the nematode Agamomermis costaricensis (a parasite) in Costa Rica (Poinar et al., 2006).
  • This species is a host for the eucharitid wasp Kapala sp. (a parasitoid) (Quevillon, 2018) (multiple encounter modes; direct transmission; transmission outside nest).
  • This species is a host for the fungus Ophiocordyceps australis (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).

Castes

Images from AntWeb

Odontomachus hastatus casent0073706 h 1 high.jpgOdontomachus hastatus casent0073706 p 1 high.jpgOdontomachus hastatus casent0073706 d 1 high.jpgOdontomachus hastatus casent0073706 l 1 high.jpg
Worker. Specimen code casent0073706. Photographer Shannon Hartman, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Odontomachus hastatus casent0246016 h 1 high.jpgOdontomachus hastatus casent0246016 p 1 high.jpgOdontomachus hastatus casent0246016 d 1 high.jpgOdontomachus hastatus casent0246016 l 1 high.jpg
Worker. Specimen code casent0246016. Photographer Andrea Walker, uploaded by California Academy of Sciences. Owned by USNM, Washington, DC, USA.
Odontomachus hastatus casent0270606 h 1 high.jpgOdontomachus hastatus casent0270606 p 1 high.jpgOdontomachus hastatus casent0270606 d 1 high.jpgOdontomachus hastatus casent0270606 l 1 high.jpg
Worker. Specimen code casent0270606. Photographer Ryan Perry, uploaded by California Academy of Sciences. Owned by PSWC, Philip S. Ward Collection.
Odontomachus hastatus casent0900583 h 1 high.jpgOdontomachus hastatus casent0900583 p 1 high.jpgOdontomachus hastatus casent0900583 d 1 high.jpgOdontomachus hastatus casent0900583 l 1 high.jpg
Syntype of Odontomachus maxillaris. Queen (alate/dealate). Specimen code casent0900583. Photographer Ryan Perry, uploaded by California Academy of Sciences. Owned by NHMUK, London, UK.

Nomenclature

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

  • hastatus. Myrmecia hastata Fabricius, 1804: 426 (w.) (no state data).
    • Type-material: holotype(?) worker.
    • [Note: no indication of number of specimens is given.]
    • Type-locality: none given, “Habitat in America meridionali Dom. Smidt. Mus. Dom. Lund”.
    • Type-depository: ZMUC.
    • Wheeler, G.C. & Wheeler, J. 1971b: 1212 (l.).
    • Combination in Odontomachus: Illiger, 1807: 194.
    • Status as species: Mayr, 1862: 711; Roger, 1861a: 31; Roger, 1863b: 22; Mayr, 1863: 437; Emery, 1878a: ix (in list); Emery, 1890b: 44; Emery, 1892d: 559 (in key); Dalla Torre, 1893: 51; Emery, 1894k: 50; Forel, 1895b: 118; Forel, 1899c: 19; Forel, 1907e: 1; Forel, 1908b: 36; Emery, 1911d: 113; Stitz, 1913: 207; Wheeler, W.M. 1916c: 3; Luederwaldt, 1918: 36; Borgmeier, 1923: 80; Wheeler, W.M. 1925a: 10; Wheeler, W.M. 1942: 156; Kempf, 1960e: 391; Kempf, 1962b: 17 (in key); Kempf, 1970b: 328; Kempf, 1972a: 171; Kempf & Lenko, 1976: 60; Brown, 1976a: 104; Bolton, 1995b: 295; Rodriguez, J. 2008: 164; Branstetter & Sáenz, 2012: 262; Bezděčková, et al. 2015: 124; Feitosa, 2015c: 99; Fernández & Guerrero, 2019: 539.
    • Senior synonym of maxillaris: Roger, 1863b: 22; Dalla Torre, 1893: 51; Forel, 1895b: 118; Forel, 1899c: 20; Emery, 1911d: 113; Borgmeier, 1923: 80; Kempf, 1972a: 171; Brown, 1976a: 104; Bolton, 1995b: 296.
    • Distribution: Brazil, Colombia, Costa Rica, Guatemala, Guyana, Mexico, Panama, Peru, Suriname.
  • maxillaris. Odontomachus maxillaris Smith, F. 1858b: 77, pl. 5, figs. 12-14 (w.q.) BRAZIL (Amazonas).
    • Type-material: 1 syntype worker, 1 syntype queen.
    • Type-localities: queen Brazil: Ega (= Tefé), 1855, “Ega 56/69” (H.W. Bates), and worker Brazil: Villa Nova, 1855 (H.W. Bates).
    • [Note: The syntype worker was not found in BMNH and is presumed lost.]
    • Type-depository: BMNH.
    • Status as species: Roger, 1861a: 27; Mayr, 1863: 437.
    • Junior synonym of hastatus: Roger, 1863b: 22; Dalla Torre, 1893: 51; Forel, 1895b: 118; Forel, 1899c: 20; Emery, 1911d: 113; Borgmeier, 1923: 80; Kempf, 1972a: 171; Brown, 1976a: 104; Bolton, 1995b: 296.

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

Odontomachus maxillaris

Syntype queen in The Natural History Museum. Labelled, “Ega. 56/69. Acc. Reg.: “1856 no. 69 (June 9). Amazon (Ega, on the R.) purchased from Stevens. Collected by H.W. Bates in the months of July, Aug. Sept. 1855.”

The syntype worker mentined by Smith was not found. He gives two localities in the original description, Ega and Villa Nova (coll. H.W. Bates). It is assumed that Ega referred to the queen (described first), and Villa Nova to the worker, now lost.

Description

Karyotype

Explore-icon.png Explore: Show all Karyotype data or Search these data. See also a list of all data tables or learn how data is managed.
  • n = 22, 2n = 44, karyotype = 4SM+2ST+38T (4M + 40A) (French Guiana) (Mariano et al., 2011; Mariano et al., 2015).

References

References based on Global Ant Biodiversity Informatics

  • Basset Y., L. Cizek, P. Cuenoud, R. K. Didham, F. Guilhaumon, O. Missa, V. Novotny, F. Odegaards, T. Roslin, J. Schmidl et al. 2012. Arthropod diversity in a tropical forest. Science 338(6113): 1481-1484.
  • Borgmeier T. 1923. Catalogo systematico e synonymico das formigas do Brasil. 1 parte. Subfam. Dorylinae, Cerapachyinae, Ponerinae, Dolichoderinae. Archivos do Museu Nacional (Rio de Janeiro) 24: 33-103.
  • CSIRO Collection
  • Camargo R. X., and P. S. Oliveira. 2012. Natural history of the Neotropical arboreal ant, Odontomachus hastatus (Formicidae, Ponerinae): Nest sites, foraging schedule, and diet. Journal of Insect Science 12: 48.
  • Dejean A., A. Compin, J. H. C. Delabie, F. Azemar, B. Corbara, and M. Leponce. 2019. Biotic and abiotic determinants of the formation of ant mosaics in primary Neotropical rainforests. Ecological Entomology https://doi-org.eproxy.lib.hku.hk/10.1111/een.12735
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  • Delabie J. H. C., R. Céréghino, S. Groc, A. Dejean, M. Gibernau, B. Corbara, and A. Dejean. 2009. Ants as biological indicators of Wayana Amerindian land use in French Guiana. Comptes Rendus Biologies 332(7): 673-684.
  • Emery C. 1896. Formiche raccolte dal dott. E. Festa nei pressi del golfo di Darien. Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Università di Torino 11(229): 1-4.
  • Escalante Gutiérrez J. A. 1993. Especies de hormigas conocidas del Perú (Hymenoptera: Formicidae). Revista Peruana de Entomología 34:1-13.
  • Fernandes I., and J. de Souza. 2018. Dataset of long-term monitoring of ground-dwelling ants (Hymenoptera: Formicidae) in the influence areas of a hydroelectric power plant on the Madeira River in the Amazon Basin. Biodiversity Data Journal 6: e24375.
  • Fernández F. 2008. Subfamilia Ponerinae s.str. Pp. 123-218 in: Jiménez, E.; Fernández, F.; Arias, T.M.; Lozano-Zambrano F. H. (eds.) 2008. Sistemática, biogeografía y conservación de las hormigas cazadoras de Colombia. Bogotá: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, xiv + 609 pp.
  • Fernández F., and T. M. Arias-Penna. 2008. Las hormigas cazadoras en la región Neotropical. Pp. 3-39 in: Jiménez, E.; Fernández, F.; Arias, T.M.; Lozano-Zambrano, F. H. (eds.) 2008. Sistemática, biogeografía y conservación de las hormigas cazadoras de Colombia. Bogotá: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, xiv + 609 pp.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Franco W., N. Ladino, J. H. C. Delabie, A. Dejean, J. Orivel, M. Fichaux, S. Groc, M. Leponce, and R. M. Feitosa. 2019. First checklist of the ants (Hymenoptera: Formicidae) of French Guiana. Zootaxa 4674(5): 509-543.
  • Gibernau M., J. Orivel, J. H. C. Delabie, D. Barabe, and A. Dejean. 2007. An asymmetrical relationship between an arboreal ponerine ant and a trash-basket epiphyte (Araceae). Biological Journal of the Linnean Society 91: 341-346.
  • Groc S., J. Orivel, A. Dejean, J. Martin, M. Etienne, B. Corbara, and J. H. C. Delabie. 2009. Baseline study of the leaf-litter ant fauna in a French Guianese forest. Insect Conservation and Diversity 2: 183-193.
  • Hahn, D.A. and D.E. Wheeler. 2002. Seasonal Foraging Activity and Bait Preferences of Ants on Barro Colorado Island, Panama. Biotropica 34(3):348-356
  • INBio Collection (via Gbif)
  • Kempf W. W. 1978. A preliminary zoogeographical analysis of a regional ant fauna in Latin America. 114. Studia Entomologica 20: 43-62.
  • Kempf W. W., and K. Lenko. 1976. Levantamento da formicifauna no litoral norte e ilhas adjacentes do Estado de São Paulo, Brasil. I. Subfamilias Dorylinae, Ponerinae e Pseudomyrmecinae (Hym., Formicidae). Studia Entomologica 19: 45-66.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Kusnezov N. 1953. La fauna mirmecológica de Bolivia. Folia Universitaria. Cochabamba 6: 211-229.
  • Lachaud J. P., P. Cerdan, and G. Perez-Lachaud. 2012. Poneromorph ants associated with parasitoid wasps of the genus Kapala Cameron (Hymenoptera: Eucharitidae) in French Guiana. Psyche doi:10.1155/2012/393486.
  • Longino J. T. 2013. Ants of Nicargua. Consulted on 18 Jan 2013. https://sites.google.com/site/longinollama/reports/ants-of-nicaragua
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/
  • Luederwaldt H. 1918. Notas myrmecologicas. Rev. Mus. Paul. 10: 29-64.
  • Majer J. D., and J. H. C. Delabie. 1994. Comparison of the ant communities of annually inundated and terra firme forests at Trombetas in the Brazilian Amazon. Insectes Sociaux 41: 343-359.
  • Mariano C. S. F., I. da Silva Santos, S. Groc, C. Leroy, P.-J. Malé, M. X. Ruiz-Gonzales, P. Cerdan, A. Dejean, and J. H. C. Delabie. 2011. Th e karyotypes of Gigantiops destructor (Fabricius) and other ants from French Guiana (Formicidae). Ann. soc. entomol. Fr. (n.s.) 47 (1–2): 140-146
  • Oliveira P. S., R. X. Camargo, and V. Fourcassié. 2011. Nesting patterns, ecological correlates of polygyny and social organization in the neotropical arboreal ant Odontomachus hastatus (Formicidae, Ponerinae). Insectes Sociaux 58: 207–217.
  • Oliveira, P.S., R.X. Camargo and V. Fourcassie. 2011. Nesting patterns, ecological correlates of polygyny and social organization in the neotropical arboreal ant Odontomachus hastatus (Formicidae, Ponerinae). Insectes Sociaux 58:207-217
  • Overal W. L., A. Y. Harada, and B. M. Mascarenhas. 1997. As formigas. In: ed. P. L. B. Lisboa, 369–379. Museu Paraense Emílio Goeldi, Belém, Brazil.
  • Ryder Wilkie K.T., A. L. Mertl, and J. F. A. Traniello. 2010. Species Diversity and Distribution Patterns of the Ants of Amazonian Ecuador. PLoS ONE 5(10): e13146.doi:10.1371/journal.pone.0013146
  • Salazar F., and D. A. Donoso. 2013. New ant (Hymenoptera: Formicidae) records for Ecuador deposited at the Carl Rettenmeyer ant collection in the QCAZ Museum. Boletín Tecnico 11, Serie Zoológica 8-9: 151 – 177.
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