Neivamyrmex adnepos

This species is only known from queens and/or workers and has yet to be associated with males.

Identification
Jack Longino:

Posterior face of propodeum concave medially, with prominent lateral carinae; apex of scape nearer eye level than upper head margin; eye indistinct or absent, and without distinct convex cornea.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Costa Rica, Ecuador, Mexico, Trinidad and Tobago.

Biology
Jack Longino: This species inhabits lowland wet forest on the Atlantic slope. I know it from two collections: at Tortuguero I found a tight column running just under the leaf litter at night; at Hitoy Cerere Biological Reserve I found workers in a rotten log.

Nomenclature

 * . Eciton (Acamatus) adnepos Wheeler, W.M. 1922c: 2 (w.) TRINIDAD.
 * Type-material: 15 syntype workers.
 * Type-locality: Trinidad: Port of Spain, Botanical Garden, vii.1920 (W.M. Wheeler).
 * Type-depositories: AMNH, MCZC, MZSP.
 * Combination in Neivamyrmex: Borgmeier, 1953: 18.
 * Status as species: Borgmeier, 1955: 562 (redescription); Kempf, 1968b: 372; Kempf, 1972a: 153; Watkins, 1976: 13 (in key); Bolton, 1995b: 287; Palacio, 1999: 157 (in key); Palacio, 2019: 615.
 * Senior synonym of marginatum: Borgmeier, 1953: 5; Borgmeier, 1955: 562; Kempf, 1972a: 153; Bolton, 1995b: 287.
 * Distribution: Brazil, Colombia, Costa Rica, Ecuador, Trinidad.
 * marginatum. Eciton (Acamatus) marginatum Borgmeier, 1939: 414 (w.) COSTA RICA.
 * Type-material: syntype workers (number not stated, “numerous”).
 * Type-locality: Costa Rica: Santa Clara Prov., Hamburgfarm, 30.viii.1936 (F. Nevermann).
 * Type-depository: MZSP.
 * Combination in E. (Neivamyrmex): Borgmeier, 1948a: 198.
 * Status as species: Borgmeier, 1948a: 198.
 * Junior synonym of adnepos: Borgmeier, 1953: 5; Borgmeier, 1955: 562; Kempf, 1972a: 153; Bolton, 1995b: 290.

References based on Global Ant Biodiversity Informatics

 * Alatorre-Bracamontes C. E., M. Vasquez-Bolanos, G. Castano-Meneses, and J. L. Navarrete-Heredia. 2015. La subfamilia Dorylinae (Hymenoptera: Formicidae) en la Colección Entomológica, Sección Formicidae, del Centro de Estudios en Zoología, Universidad de Guadalajara (CZUG) (pp. 40-51). En: Castaño Meneses G., M. Vásquez-Bolaños, J. L. Navarrete-Heredia, G. A. Quiroz-Rocha e I. Alcalá-Martínez (Coords.). Avances de Formicidae de  México.  UNAM,  Universiad  de  Guadalajara, Guadalajara, Jalisco.
 * Borgmeier T. 1953. Vorarbeiten zu einer Revision der neotropischen Wanderameisen. Studia Entomologica 2: 1-51.
 * Borgmeier T. 1955. Die Wanderameisen der neotropischen Region. Studia Entomologica 3: 1-720.
 * Branstetter M. G. and L. Sáenz. 2012. Las hormigas (Hymenoptera: Formicidae) de Guatemala. Pp. 221-268 in: Cano E. B. and J. C. Schuster. (eds.) 2012. Biodiversidad de Guatemala. Volumen 2. Guatemala: Universidad del Valle de Guatemala, iv + 328 pp
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * Esteves F. A., C. R. F. Brandao, and L. P. Prado. 2011. The type specimens of Dorylomorph ants (Hymenoptera, Formicidae: Aenictinae, Ecitoninae, Cerapachyinae, Leptanilloidinae) deposited in the Museu de Zoologia da Universidade de Sao Paulo, Brazil. Papeis Avulsos de Zoologia 51(22): 341-397.
 * 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., and E. E. Palacio. 1995. Hormigas de Colombia IV: nuevos registros de géneros y especies. Caldasia 17: 587-596.
 * Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
 * Kempf W. W. 1968. Miscellaneous studies on Neotropical ants. IV. (Hymenoptera, Formicidae). Studia Entomologica 11: 369-415.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/
 * O'Donnell S., J. Lattke, S. Powell, and M. Kaspari. 2007. Army ants in four forests: geographic variation in raid rates and species composition. Journal of Animal Ecology 76: 580-589.
 * Watkins J. F., II 1976. The identification and distribution of New World army ants (Dorylinae: Formicidae). Waco, Texas: Baylor University Press, 102 pp
 * Wheeler W. M. 1922. The ants of Trinidad. American Museum Novitates 45: 1-16.