Gnamptogenys pertusa

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

Gnamptogenys pertusa casent0281849 p 1 high.jpg

Gnamptogenys pertusa casent0281849 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of this species.

Identification

Lattke (2004) - G. pertusa may be confused with Gnamptogenys lacunosa because of the angular anterior clypeal lamella margin and with Gnamptogenys polytreta because of the prominent occipital lamella. Gnamptogenys rugodens also has these same traits, but the deep mandibular rugosities easily distinguish G. rugodens. G. lacunosa has more deeply strigulose sculpturing on the mandibular base than G. pertusa, and the mandibular base in G. lacunosa is not as bulging and convex as in G. pertusa. The dorsal margin of the petiolar node in G. lacunosa is more evenly convex, and the subpetiolar process is shaped as a rounded lobe; the postpetiolar tergite is mostly smooth in lateral view with punctae present on the anterior third or less. G. polytreta has a convex mandibular base but not as bulging as in G. pertusa, the subpetiolar process is triangular with a blunt posterior angle, and the dorsal margin of the petiolar node is more evenly convex. The node in G. pertusa has a sharper anterior curvature.

Distribution

Distribution based on Regional Taxon Lists

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

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 pertusa. 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.

  • pertusa. Gnamptogenys pertusa Lattke, 2004: 209, figs. 48c, 58a,b (w.) BORNEO.

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

Lattke 2004 Gnamptogenys fig 45-49

Mandible with swollen base in frontal view; clypeal lamella translucent, with broadly convex anterior margin; subpetiolar process subquadrate with sharp posterior angle in lateral view; propodeal declivity sharply defined laterally by low crests.

Type Material

Description

Worker

Lattke 2004 Gnamptogenys fig 58-60

Metrics. [Holotype] Paratype: HL [0.70] 0.69, HW [0.55] 0.53, ML [0.31] 0.30, SL [0.43] 0.43, ED [0.15] 0.13, WL [0.97] 0.95 mm. CI [0.76] 0.77, SI [0.76] 0.81, MI [0.55] 0.55, OI [0.27] 0.25. Head with subparallel sides in dorsal view; foveolae on frons with intervening spaces broad or broader than average diameter of foveolae; clypeus with anteromedian smooth to undulated area, laterally with longitudinal strigulae, lamella translucent with background lighting, anterior margin convex; mandible with convex bulging base; dorsally rugulose-punctate, apically mostly smooth; very small, broadly separated denticles present on chewing border; head with evenly convex occipital lamella in lateral view; posterodorsal mandibular margin with brief, mostly straight margin, then with pronounced convexity in lateral view.

Pronotum laterally foveolate along dorsal half, mostly smooth on ventral half, strigulae present along posterior edge; anepisternum rhomboid, smooth with some punctae; katepisternum mostly smooth, with shallow strigulae along anterodorsal corner; metapleuron and propodeum mostly smooth, longitudinal strigulae present along ventral area of metapleuron; propodeum foveolate, propodeal declivity sharply defined laterally by low crests. Dorsum of mesosoma and petiole sparsely foveolate, mostly smooth especially along longitudinal median strip; petiole with ventral process anteriorly convex in lateral view, ending in a posterior angle; postpetiole laterally with close and deep foveolae anterad, posteriorly becoming shallow and sparse; postpetiolar dorsum mostly smooth with sparse, shallow, piligerous punctae; fore coxa transversely strigulose along posterior half, smooth anterad. Dorsum of thorax and abdominal segments 1-4 with scattered erect to subdecumbent hairs. Body dark brown; legs, antennae, and mandibles ferruginous brown.

Type Material

Holotype worker. Malaysia, Sabah, Borneo, mi. 45 Labuk Road, ex Sandakan (Lungmanis), 12/13-vi-1968, R.W. Taylor, acc. 68.502. Deposited in Australian National Insect Collection. The holotype of G. pertusa is decapitated, with body and head mounted on separate points. Paratype. One callow worker on same pin as holotype, deposited in ANIC.

Etymology

The species name is derived from the Latin adjective for “perforated,” pertusus, and alludes to the depressions of its foveolate sculpturing.

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 209, figs. 48c, 58a, b worker described)