Gnamptogenys sila

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Gnamptogenys sila
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. sila
Binomial name
Gnamptogenys sila
Lattke, 2004

Gnamptogenys sila casent0900589 p 1 high.jpg

Gnamptogenys sila casent0900589 d 1 high.jpg

Specimen Labels

Synonyms

Nothing is known about the biology of Gnamptogenys sila.

Identification

Lattke (2004) - This species is unusual in having punctae that are more or less round, uniformly well impressed and flat bottomed throughout its body. Such depressions are found in other species of the epinotalis group but are usually limited to the head. The areolate area on the vertex of Gnamptogenys major is unique among species of Gnamptogenys, which usually have a few striae or scattered punctae on the vertex but no areolae.

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Not much is known about the the biology of Gnamptogenys sila. 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

Queen and male are unknown.

Nomenclature

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

  • sila. Gnamptogenys sila Lattke, 2004: 177, fig. 44 (w.) BORNEO.

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

Vertex with small posteromedian area of fine areolae, anterior margin of clypeal lamella sinuate, with median convexity, lamella rounded at extreme lateral margins; mesosoma and postpetiole with round, well impressed, flat-bottomed punctae; postpetiolar tergite rugulose-punctate laterally.

Description

Worker

Lattke 2004 Gnamptogenys fig 43-44

Worker. Metrics. Holotype: HL 0.55, HW 0.45, ML 0.23, SL 0.39, ED 0.03, WL 0.65 mm. CI 0.82, SI 0.87, MI 0.51, OI 0.07. Head with anterior margin of clypeal lamella sinuate in frontal view, medially convex and rounded at extreme lateral ends; frons mostly rugulose-punctate with large flat-bottomed punctae; cephalic surface ventrad of eyes more strigulose than punctate; posteromedian surface of vertex finely areolate; clypeus with longitudinal strigulae and median broad sulcus. Mesosoma with very broadly convex dorsal margin in lateral view, forming blunt angle with broadly concave propodeal declivity; pronotum laterally rugose-punctate; katepisternum strigulose, anepisternum rugulose-punctate; mesosomal dorsum longitudinally rugulose-punctate; promesonotal suture vestigial; metapleuron and lateral propodeal surface strigulose with sparse punctae, metapleuron with small smooth area, slightly depressed below surrounding cuticle; propodeal declivity mostly strigulose with prominent posterolateral carina, propodeal spiracle opening not projecting beyond declivitous margin.

Lateral face of petiole strigulose; postpetiolar tergite mostly rugulose-punctate, punctae disappearing posteromedially, sternite irregularly rugulose-punctate; abdominal tergite 4 mostly smooth, with low longitudinal strigulae and undulations, sparsely punctate, punctae becoming smaller and diminishing posterad, narrow row of scrobiculate sculpture parallel to pretergite present; sternite of fourth abdominal segment strigulose, mostly punctate with low longitudinal strigulae or undulations. Fore coxae transversely strigulose in lateral view, metacoxal tooth triangular. Dorsum of thorax and abdominal segments 1-4 with scattered erect to subdecumbent hairs, besides abundant short standing hairs. Head, mesosoma, petiole, and gaster brown; mandibles, antennae, legs ferruginous yellow.

Type Material

Holotype worker. Malaysia, Sabah, Gunong Silam, 330m, 1983, R. Leakey (A9/72). Deposited in The Natural History Museum. Paratypes. Three workers in the BMNH from the same series as the holotype.

Etymology

The species name is derived from the name of the type locality, Gunong Silam, and is assumed to be feminine.

References

  • Lattke, J. E. 2004. A Taxonomic Revision and Phylogenetic Analysis of the Ant Genus Gnamptogenys Roger in Southeast Asia and Australasia (Hymenoptera: Formicidae: Ponerinae). University of California Publications in Entomology 122: 1-266 (page 177, fig. 44 worker described)