Gnamptogenys siapensis

Identification
This species is quite near to Gnamptogenys lucaris and the differences between the two species may be infraspecific: in lucaris the petiolar node dorsum is evenly convex, the metacoxal tooth is broadly triangular and the subpetiolar process has acutely pointed angles. (Lattke 1995)

Distribution based on Regional Taxon Lists
Neotropical Region: Venezuela.

Nomenclature

 *  siapensis. Gnamptogenys siapensis Lattke, 1995: 183, figs. 62, 63 (w.) VENEZUELA.

Worker
HL 1.13; ML 0.44; HW 1.00; ED 0.25; SL 0.97; WL 1.60 mm; CI 0.89; SI 0.97; OI 0.25.

Cephalic dorsum with fine longitudinal costulae; eyes placed behind mid length; clypeal lamella anteriorly straight and laterally bluntly angulose; mandibles smooth and shining, subtriangular with apical and basal margins joined through broad convexity; scapes smooth and shining, surpassing vertexal margin, antennal bullae partially visible beneath frontal lobes; costulae longitudinal throughout mesosomal dorsum, propodeal declivity and petiolar node; promesonotal and mesometanotal sutures weakly impressed; mesometapleural suture well impressed; petiolar node more or less as long as wide, in lateral view subquadrate; subpetiolar process subquadrate, with angulate ventral corners; postpetiolar sternum medially smooth and shining and with lateral longitudinal costulae; tibiae and femora smooth and shining; metacoxae with basal triangular lobe, dorsally transversely costulate and laterally mostly smooth and shining; abundant long suberect and subdecumbent hairs on body. Color ferruginous.

Type Material
Holotype worker. Venezuela, Amazonas: Alto Rio Siapa, l°40'N 64°35'W, 600 m, 4-II-89, J. Lattke, leg. Sifted leaf litter sample. The specimen was caught in an area occasionally flooded during the rainy season. Deposited in.

Etymology
The species name alludes to the type locality.