Holcoponera brunnea

Nothing is known about the biology of .

Identification
A member of the porcata subgroup (in the striatula species group). This species is close to Gnamptogenys nigrivitrea on account of size, posteriorly tilted petiolar node, sleek appearance, subpetiolar process shape, sparse pilosity and lack of any trace of anterior petiolar peduncle. But nigrivitrea is different in its piceous body coloration with dark brown legs, lack of metanotal groove, slightly more elevated propodeal spiracles, longer pilosity, and a sleeker petiolar node with a more prominent apical point. (Lattke 1995)

Distribution based on Regional Taxon Lists
Neotropical Region: Colombia.

Nomenclature

 * . Gnamptogenys brunnea Lattke, 1995: 162, figs. 41, 42 (w.q.) COLOMBIA.
 * Type-material: holotype worker, 18 paratype workers, 1 paratype queen.
 * Type-locality: holotype Colombia: Chocó, 10 km. SW San Jose de Palmar, Finca Los Guaduales, 760 m., 2.vi.1978 (C. Kugler); paratypes with same data.
 * Type-depositories: MIZA (holotype); BMNH, LACM, MCZC, MIZA, MZSP, USNM (paratypes).
 * Status as species: Lattke, et al. 2004: 343; Lattke, et al. 2007: 258 (in key); Lattke, et al. 2008: 82; Feitosa & Prada-Achiardi, 2019: 671; Camacho, et al. 2020: 454 (in key).
 * Distribution: Colombia.

Worker
Holotype (Paratypes) measurements: HL 0.90 (0.88-0.92); ML 0.30 (0.30-0.32); HW 0.74 (0.68-0.80); SL 0.74 (0.80-0.84); WL 1.20 (1.10-1.28) mm; CI 0.82 (0.77--0.87); SI 1.00 (0.95-1.09); OI 0.18 (0.l6-0.l8) n = 5.

Cephalic dorsum longitudinally costulate; in frontal view vertexal margin concave and eyes slightly behind mid-length; mandibles triangular, with dorsal costulae, basal and apical margins with narrow smooth and shining strip that is sharply separated and lower than the rest of mandibular surface; anterior pronotal margin with 6-8 transverse costulae which arch around and become longitudinal on dorsum; mesometanotal suture well-impressed; mesonotum narrow and transverse; in lateral view dorsal propodeal face slightly depressed below rest of mesosomal dorsal margin; declivitous propodeal face distinctly separated from rest of mesosoma by low lateral ridges; mostly transverse costulae with longitudinal costulate from dorsum ex tending only to anterior one-fourth of declivitous face; petiolar node in lateral view transversely costulate and posteriorly inclined: a broad anterior convexity with sharp posterior drop and concave posterior margin; subpetiolar process shaped as an anteriorly projecting lobe; anterior postpetiolar face and sternum with transverse costulae, longitudinal on rest; costulae on the gastric tergum II finer than on preceding segment; metacoxal spine present.

Body with sparse decumbent pubescence and erect to suberect hairs; pubescence denser on legs; scapes with abundant decumbent pubescence, no erect or suberect hairs. Body reddish-brown and legs brownish-yellow.

Queen
HL 0.98; HW 0.86; ML 0.32; SL 0.84; ED 0.18; WL 1.44 mm; CI 0.88; SI 0.97; OI 0.21. Like workers with exception of usual caste differences.



Type Material
Holotype worker. Colombia, Choco, 10 km SW San Jose del Palmar, Finca Los Guaduales, 760 m, 2-VI-1978, C. Kugler, leg. Deposited in. Paratypes; One queen and 18 nidotype workers. Queen and 6 workers deposited in. Two workers deposited in each of the following:, , , MUSP,.

Etymology
The name comes from the Latin term for brown, brunneus.

References based on Global Ant Biodiversity Informatics

 * Arias-Penna T. M. 2008. Subfamilia Ectatomminae. Pp. 53-107 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.
 * Ulloa Chacon P., M. L. Baena, J. Bustos, R. C. Aldana, J. A. Aldana, and M. A. Gamboa. 1996. Fauna de hormigas del departamento del Valle del Cauca (Colombia). Pp. 413-451. In Andrade-C M. G., G. Amat Garcia, and F. Fernandez. Insectoss de Colombia, estudios escogidos.