Gnamptogenys rastrata

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Gnamptogenys rastrata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. rastrata
Binomial name
Gnamptogenys rastrata
(Mayr, 1866)

Gnamptogenys rastrata casent0281223 p 1 high.jpg

Gnamptogenys rastrata casent0281223 d 1 high.jpg

Specimen labels


Captured in wet forests, including montane areas. A millipede feeder.


A member of the rastrata complex (in the rastrata subgroup of the rastrata species group). Antennal scapes surpass vertexal margin by no more than their apical width; triangular and edentate mandibles with a varying degree of costulate and rugae; small tubercle-like propodeal teeth next to conspicuous spiracles which are slightly elevated above rest of surrounding cuticle; postpetiolar sternum with median longitudinal smooth and shining areas. The sculpture on the node as seen dorsally can vary from concentric costulae, with transverse or longitudinal costulae in the middle, or completely transverse. The petiolar node can be wider than long or the opposite. Size range is HL 0.74-0.90; WL 1.10-1.28 mm. (Lattke 1995)

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality), Paraguay.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


Not much is known about the the biology of Gnamptogenys rastrata. We can speculate that the biology of this species is similar to other species of the genus. Gnamptogenys are predatory ponerine ants that inhabit tropical and subtropical mesic forests. Nesting is typically at ground level in rotten wood or leaf litter. Some exceptions include species that are arboreal, a dry forest species and species that nests in sandy savannahs. Colony size tends to be, at most, in the hundreds. Queens are the reproductives in most species. Worker reproduction is known from a few species in Southeastern Asia. Generalist predation is the primary foraging/dietary strategy. Specialization on specific groups (millipedes, beetles, other ants) has developed in a few species.




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

  • rastrata. Ectatomma rastratum Mayr, 1866b: 890 (q.) BRAZIL (no state data).
    • Type-material: holotype queen.
    • Type-locality: Brazil: (no further data) (F. Sahlberg).
    • Type-depository: NHMW.
    • [Misspelled as rostratum by Emery, 1890b: 41, and others.]
    • Brown, 1958g: 322 (w.).
    • Combination in Ectatomma (Rhytidoponera): Mayr, 1887: 539;
    • combination in E. (Gnamptogenys): Emery, 1890b: 41;
    • combination in E. (Parectatomma): Emery, 1911d: 44;
    • combination in Gnamptogenys: Brown, 1958g: 229.
    • Status as species: Emery, 1890b: 41; Dalla Torre, 1893: 25; Emery, 1894k: 47; Forel, 1895b: 113; Emery, 1896g: 46 (in key); Forel, 1899c: 9; Emery, 1911d: 44; Borgmeier, 1923: 59; Wheeler, W.M. 1925a: 5; Brown, 1958g: 229, 321 (redescription); Kempf, 1972a: 114; Kempf & Lenko, 1976: 52; Bolton, 1995b: 210; Lattke, 1995: 180; Wild, 2007b: 27; Lattke, et al. 2007: 263 (in key); Bezděčková, et al. 2015: 111; Feitosa, 2015c: 98; Camacho, et al. 2020: 461 (in key).
    • Senior synonym of trigona: Lattke, 1995: 180.
    • Distribution: Argentina, Bolivia, Brazil, Paraguay, Peru.
  • trigona. Ectatomma (Gnamptogenys) trigonum Emery, 1906c: 114 (footnote) (q.) BRAZIL (Santa Catarina).
    • Type-material: holotype queen.
    • Type-locality: Brazil: Santa Catarina, Nova Friburgo (no collector’s name, possibly F. Silvestri).
    • Type-depository: MSNG.
    • Brown, 1958g: 323 (w.).
    • Combination in E. (Parectatomma): Emery, 1911d: 44;
    • combination in Gnamptogenys: Brown, 1958g: 230.
    • Status as species: Emery, 1911d: 44; Borgmeier, 1923: 60; Brown, 1958g: 230, 322; Kempf, 1972a: 116; Bolton, 1995b: 211.
    • Junior synonym of rastrata: Lattke, 1995: 180.



References based on Global Ant Biodiversity Informatics

  • Bihn J. H., M. Verghaagh, M. Brandle, and R. Brandl. 2008. Do secondary forests act as refuges for old growth forest animals? Recovery of ant diversity in the Atlantic forest of Brazil. Biological Conservation 141: 733-743.
  • 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.
  • Brown W. L., Jr. 1958. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bull. Mus. Comp. Zool. 118: 173-362.
  • Emery C. 1890. Studii sulle formiche della fauna neotropica. Bull. Soc. Entomol. Ital. 22: 38-8
  • Emery C. 1894. Estudios sobre las hormigas de Costa Rica. Anales del Museo Nacional de Costa Rica 1888-1889: 45-64.
  • Emery C. 1911. Hymenoptera. Fam. Formicidae. Subfam. Ponerinae. Genera Insectorum 118: 1-125.
  • Favretto M. A., E. Bortolon dos Santos, and C. J. Geuster. 2013. Entomofauna from West of Santa Catarina State, South of Brazil. EntomoBrasilis 6 (1): 42-63.
  • 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).
  • Lattke J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). Journal of Hymenoptera Research 4: 137-193
  • Pires de Prado L., R. M. Feitosa, S. Pinzon Triana, J. A. Munoz Gutierrez, G. X. Rousseau, R. Alves Silva, G. M. Siqueira, C. L. Caldas dos Santos, F. Veras Silva, T. Sanches Ranzani da Silva, A. Casadei-Ferreira, R. Rosa da Silva, and J. Andrade-Silva. 2019. An overview of the ant fauna (Hymenoptera: Formicidae) of the state of Maranhao, Brazil. Pap. Avulsos Zool. 59: e20195938.
  • Rosa da Silva R. 1999. Formigas (Hymenoptera: Formicidae) do oeste de Santa Catarina: historico das coletas e lista atualizada das especies do Estado de Santa Catarina. Biotemas 12(2): 75-100.
  • Rosa da Silva R., and B. Cortes Lopes. 1997. Ants (Hymenoptera: Formicidae) from Atlantic rainforest at Santa Catarina Island, Brazil: two years of sampling. Rev. Biol. Trop. 45(4): 1641-1648.
  • Rosumek, F.B., M.A. Ulyssea, B.C. Lopes, J. Steiner. 2008. Formigas de solo e de bromélias em uma área de Mata Atlântica, Ilha de Santa Catarina, sul do Brasil: Levantamento de espécies e novos registros. Revista Biotemas 21(4):81-89.
  • Silva R. R., R. S. Machado Feitosa, and F. Eberhardt. 2007. Reduced ant diversity along a habitat regeneration gradient in the southern Brazilian Atlantic Forest. Forest Ecology and Management 240: 61-69.
  • Silva R.R., and C. R. F. Brandao. 2014. Ecosystem-Wide Morphological Structure of Leaf-Litter Ant Communities along a Tropical Latitudinal Gradient. PLoSONE 9(3): e93049. doi:10.1371/journal.pone.0093049
  • Ulyssea M.A., C. E. Cereto, F. B. Rosumek, R. R. Silva, and B. C. Lopes. 2011. Updated list of ant species (Hymenoptera, Formicidae) recorded in Santa Catarina State, southern Brazil, with a discussion of research advances and priorities. Revista Brasileira de Entomologia 55(4): 603-–611.
  • Wheeler W. M. 1925. Neotropical ants in the collections of the Royal Museum of Stockholm. Arkiv för Zoologi 17A(8): 1-55.
  • Wild, A. L.. "A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)." Zootaxa 1622 (2007): 1-55.