Gnamptogenys boliviensis

Identification
A member of the mordax subgroup (in the mordax species group). Gnamptogenys boliviensis is near to Gnamptogenys continua and the possibility exists that the collection and study of more material may show them to be conspecific. In G. continua the sculpture is coarser, costate-costulate, and the mandibles are more robust, without a concave inner edge. (Lattke 1995)

Key to New World Gnamptogenys Species

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia.

Nomenclature

 *  boliviensis. Gnamptogenys boliviensis Lattke, 1995: 160, figs. 43, 44 (w.m.) BOLIVIA.

Worker
Holotype (Paratypes) measurements: HL 0.88 (0.83-0.88); ML 0.36 (0.39-0.41); HW 0.70 (0.69-0.70); SL 0.49 (0.48-0.50); ED 0.10 (0.10-0.1 2); WL 1.23 (1.06-1.15) mm; CI 0.70 (0.80-0.84); SI 0.70 (0.69-0.71); OI 0.15 (0.15-0.18). n = 4.

Head in frontal view elongate, lateral margins fairly parallel, vertexal margin concave; anterior lamella of clypeus laterally rounded and medianly convex; eyes situated at mid-length; antennae smooth and shining, dorsoventrally compressed widest apicad; mandibles smooth and shining dorsally, with sparse punctae, subfaleate, laterobasally with small area of longitudinal rugae, including small sulcus never longer than one-fourth of the mandible; gula with longitudinal costulae, front of head with longitudinal striae.

Occasional transverse costulae on pronatal collar; mesosomal dorsum with longitudinal costulae, slightly thicker on metanotum and propdeum than on promesonotum; pronotal suture softly impressed, visible only in certain angles of view; metanotal suture deeply impressed but doesn't break longitudinal sculpture; declivitous propodeal face with oblique to transverse costulae and two superolateral ridges; pronotum laterally with transverse costulae, smooth and shining along ventral margin; anepisternum elongate and obliquely costulate; katepisternum and metepisternum with transverse costulae; costulae on metepisternum have same direction as on katepisternum, but costulate on lateral propodeal face are more horizontal; propodeal spiracle round and not prominently higher than surrounding sculpture; petiole slighty pedunculate, dorsally with longitudinal costulae, anterior face with transverse costula or rugae, sometimes partially effaced, laterally with longitudinal costulae with slight oblique tendency; node in lateral view with softly convex dorsal margin, anteriorly concave; anterior and posterior faces fairly sharply separated from dorsal face; posterior face with 4-5 convex costulae; subpetiolar process varies from subquadrate anteriorly and posteriorly concave.

Anterior postpetiolar face smooth and shining; gastric terga I and II with longitudinal striae, sternum I laterally costulate, but discal area smooth and shining as is rest of gaster; procoxa anteriorly and anterolaterally smooth and shining, posterolaterally costulate; mesocoxae with transverse costulae that tend to be effaced; dorsum of metacoxa with transverse costulate and basal, low triangular lobe; tibia and femora smooth and shining. Body ferruginous brown; legs and antennae testaceous.

Male
Mandibles triangular, apical edge serrate, dorsally smooth and shining; cephalic dorsum with longitudinal striae that tend to be effaced before reaching mid-ocellus, faint transverse rugae above the posterior ocelli but rest of head smooth and shining; propodeum rugose; petiole with lateral rugulae, dorsum shining, with slight roughened aspect and median longitudinal costulae; gastric sterna and terga smooth and shining; vestigial arolea present.

Type Material
Holotype worker. Bolivia, Tumupasa, W.M. Mann, leg. Deposited in the. Paratypes: Seven workers deposited in the ; One worker and one male in each of the following:, , ,. One worker in MUSP. All from same locality and probably from the same nest. One specimen bears an additional label: “Mulford Biological Expedition, 1921-1922.” Consultation of maps locates Tumupasa at 14°09'S 67°55' W in lowland forests of the upper Rio Beni watershed.

Etymology
The name is derived from the name of the type locality country, Bolivia.