Apterostigma robustum

Identification
Mera-Rodriguez, et al. (2020) - Frontal lobes with each lateral margin convex and strongly curved ventrally; anterior margin of clypeus uniformly convex; mandible with 11 teeth that increase gradually in size towards the apical tooth; and propodeum in lateral view gradually higher than the metanotum (Lattke 1997).

Distribution
Mera-Rodriguez, et al. (2020) - Apterostigma robustum is distributed from Honduras in Central America south to Bolivia and Brazil, where it occurs in the states of Amazonas, Maranhão, and Pará (Kempf 1972; Lattke 1997; Fernández and Sendoya 2004).

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia, Brazil, Costa Rica, French Guiana, Guyana, Honduras, Peru, Suriname.

Nomenclature

 * . Apterostigma robustum Emery, 1896g: 98, pl. 1, fig. 17 (w.) COSTA RICA.
 * Lattke, 1997: 168 (m.).
 * Status as species: Forel, 1899c: 38; Wheeler, W.M. 1911h: 208 (in key); Emery, 1924d: 338; Weber, 1938b: 170; Weber, 1958c: 249; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167 (redescription); Guénard & Economo, 2015: 227; Fernández & Serna, 2019: 839.
 * Senior synonym of amiae: Weber, 1958c: 249; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * Senior synonym of branneri: Weber, 1958c: 249; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * Senior synonym of constrictum: Weber, 1958c: 250; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * Senior synonym of tic: Weber, 1958c: 250; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * amiae. Apterostigma amiae Weber, 1937: 391 (w.) GUYANA.
 * Status as species: Weber, 1946b: 132.
 * Junior synonym of robustum: Weber, 1958c: 249; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * branneri. Apterostigma branneri Mann, 1916: 456, pl. 5, fig. 37 (w.q.m.) BRAZIL (Rondônia).
 * Status as species: Emery, 1924d: 338; Borgmeier, 1927c: 124.
 * Junior synonym of robustum: Weber, 1958c: 249; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * constrictum. Apterostigma robustum subsp. constrictum Weber, 1938b: 173 (w.q.m.) BOLIVIA.
 * Junior synonym of robustum: Weber, 1958c: 250; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.
 * tic. Apterostigma robustum subsp. tic Weber, 1938b: 170, fig. 7 (w.q.m.) COSTA RICA.
 * Junior synonym of robustum: Weber, 1958c: 250; Kempf, 1972a: 24; Bolton, 1995b: 74; Lattke, 1997: 167.

References based on Global Ant Biodiversity Informatics

 * Emery C. 1896. Studi sulle formiche della fauna neotropica. XVII-XXV. Bullettino della Società Entomologica Italiana 28: 33-107.
 * 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.
 * 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.
 * Lattke J. E. 1997. Revisión del género Apterostigma Mayr (Hymenoptera: Formicidae). Arquivos do Instituto Biológico (São Paulo) 34: 121-221
 * Longino J. T. 2013. Ants of Honduras. Consulted on 18 Jan 2013. https://sites.google.com/site/longinollama/reports/ants-of-honduras
 * Longino J. T. 2013. Ants of Nicargua. Consulted on 18 Jan 2013. https://sites.google.com/site/longinollama/reports/ants-of-nicaragua
 * Longino J. T., and R. K. Colwell. 2011. Density compensation, species composition, and richness of ants on a neotropical elevational gradient. Ecosphere 2(3): 16pp.
 * Mayhe-Nunes A. J., and K. Jaffe. 1998. On the biogeography of attini (Hymenoptera: Formicidae). Ecotropicos 11(1): 45-54.
 * 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.
 * Weber N. A. 1937. The biology of the fungus-growing ants. Part l. New forms. Rev. Entomol. (Rio J.) 7: 378-409.
 * Weber N. A. 1938. The biology of the fungus-growing ants. Part IV. Additional new forms. Part V. The Attini of Bolivia. Rev. Entomol. (Rio J.) 9: 154-206.
 * Weber N. A. 1946. The biology of the fungus-growing ants. Part IX. The British Guiana species. Revista de Entomologia (Rio de Janeiro) 17: 114-172.
 * Weber N. A. 1958. Synonymies and types of Apterostigma (Hym: Formicidae). Entomological News 69: 243-251.