Gnamptogenys cuneiforma

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Gnamptogenys cuneiforma
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. cuneiforma
Binomial name
Gnamptogenys cuneiforma
Lattke, 1995

Gnamptogenys cuneiforma casent0179972 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Gnamptogenys cuneiforma.

Identification

A member of the rastrata complex (in the rastrata subgroup of the rastrata species group). This species may be confused with two other small rastrata group species: Gnamptogenys rastrata and Gnamptogenys mecotyle. It is separable from the former on account of the longer scapes (surpassing the vertexal margin), transverse costulae on the propodeum as opposed to longitudinal, and a well-defined metapleura, separated from the propodeum laterally by an impressed line, lacking in rastrata. The costulae of mecotyle have a coarse aspect in contrast with the smooth regularity in cuneiforma, mecotyle also has the striae on the scapes and dorsal mandibuar surface better defined and the masticatory border lacks the concavity of cuneiforma. (Lattke 1995)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Panama (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Not much is known about the the biology of Gnamptogenys cuneiforma. We can speculate that the biology of this species is similar to other species of the genus. Gnamptogenys are predatory ponerine ants that inhabit tropical and subtropical mesic forests. Nesting is typically at ground level in rotten wood or leaf litter. Some exceptions include species that are arboreal, a dry forest species and species that nests in sandy savannahs. Colony size tends to be, at most, in the hundreds. Queens are the reproductives in most species. Worker reproduction is known from a few species in Southeastern Asia. Generalist predation is the primary foraging/dietary strategy. Specialization on specific groups (millipedes, beetles, other ants) has developed in a few species.

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • cuneiforma. Gnamptogenys cuneiforma Lattke, 1995: 164 (w.) PANAMA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Head subquadrate in frontal view, sides very broadly convex, slightly wider anteriorly than posteriorly, posterior margin broadly concave, longitudinally castulate. Anterior clypeal margin with a small lamella, medianly straight and laterally rounded. A brief longitudinal carinae, thicker than surrounding sculpture, present between frontal lobes. Mandibles triangular and elongate, masticatory border concave, dorsal surface of blade convex and with longitudinal rugulae. Scapes shining and with low rugosities. Scapes without pilosity, only decumbent hairs.

Anterior pronotal face with 4-5 transverse costulae, sometimes quite rough and resembling rugae, longitudinal costulate on the dorsum posterad including the mesonotum. Metanotum and propodeum with transverse costae.

Promesonotal suture well to poorly impressed, metanotal groove well impressed. In lateral view the mesosoma has a very broadly convex dorsal margin, propodeal denticles brief and triangular, declivity concave. Sides of pronotum with regular longitudinal, slightly oblique costae. Anepisternum fulcrum shaped . Katepisternum with a well-developed flange. Mesopleura, propodeum and dorsal two-thirds of metapleura with transverse/oblique costae; metapleura ventrad of spiracle with longitudinal costae.

Petiole in lateral view with a low and broadly convex dorsal margin, ventral process projects anterad. Dorsally with transverse costae, posterior margin rugose. Gastric dorsum with longitudinal costulation; ventrum of postpetiole with transverse rugae along posterior half; irregular rugulae anterad to the process.

Base of foretarsus with a single stout setae opposite the strigil. Forecoxae with transverse costulae on lateral face, as well as dorsal faces of meso- and meta coxae. Legs shining and with abundant shallow punctulae. Very sparse pilosity on femora and tibiae. Color ferruginous to dark brown; mandibles, antennae and legs ferruginous.

Type Material

Holotype worker: Panama, Bocas del Toro, 8°47'N 82°1l'W, 500m; 16/18-VII-87, D. M. Olson, leg. Deposited in Museum of Comparative Zoology. Paratypes: One worker deposited in MCZC and two workers deposited in Instituto de Zoologia Agricola, all with same locality data as the holotype.

Etymology

The name alludes to the shape of the anepisternum.

References