Gnamptogenys meghalaya

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Gnamptogenys meghalaya
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. meghalaya
Binomial name
Gnamptogenys meghalaya
Lattke, 2004

Gnamptogenys meghalaya casent0900563 p 1 high.jpg

Gnamptogenys meghalaya casent0900563 d 1 high.jpg

Specimen Labels

This species has been collected from forest litter.

Identification

Lattke (2004) - This species is similar to Gnamptogenys binghamii from the western part of its geographic range and is sympatric with it in the Garo Hills of the Indian state of Meghalaya. G. binghamii has distinct occipital lobes, and the lateral cephalic margins are relatively parallel in frontal view and are not diverging posterad as in G. meghalaya. The frons of G. binghamii has striae on the transverse ridges between the foveolae, while the ridges in G. meghalaya are mostly glazed or rounded. G. meghalaya is also slightly smaller than G. binghamii on average.

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: India (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 meghalaya. 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

Males are unknown.

Nomenclature

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

  • meghalaya. Gnamptogenys meghalaya Lattke, 2004: 125, fig. 28 (w.q.) INDIA.

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

Head elongate in frontal view; lateral margins broadly convex, diverging posterad; posterior margin concave, forming blunt obtuse angle; anterior margin of clypeal lamella forming obtuse angle, medially projecting; eye small; occipital lobe lacking; occipital lamella small; scape mostly smooth with scattered punctulae. Petiolar node evenly convex in lateral view; ventral process subquadrate.

Type Material

Description

Worker

Lattke 2004 Gnamptogenys fig 28-30

Metrics. [Holotype] Paratypes (n = 5): HL [0.95] 0.90-1.00, HW [0.87] 0.77-0.89, ML [0.52] 0.44-0.52, SL [0.74] 0.68-0.77, ED [0.14] 0.14-0.17, WL [1.32] 1.23-1.37 mm. CI [0.92] 0.84-0.89, SI [0.85] 0.87-0.96, MI [0.60] 0.56-0.64, OI [0.16] 0.17-0.22. Head with broadly convex lateral margins in frontal view, posterior margin concave, forming blunt obtuse angle; anterior margin of clypeal lamella forming medially projecting obtuse angle; frons densely rugulose-punctate, ridges between punctae rounded or flat, not sharp; clypeus longitudinally strigulose; eye small; occipital lobe lacking; occipital lamella relatively small; scape mostly smooth with scattered punctulae; mesosoma foveolate in lateral view; katepisterum with some strigulae; posteroventral metapleuron longitudinally strigulose; mesosomal dorsal margin anteriorly convex, dorsally broadly convex, with broadly concave declivitous margin in lateral view. Mesosomal dorsum densely foveolate with median shallow longitudinal sulcus on mesonotum, sometimes extending onto posteromedian pronotum; propodeal declivitous face mostly smooth, denticles triangular. Petiolar node evenly convex in lateral view, ventral process subquadrate; postpetiolar dorsum foveolate-punctate with shallow undulations and slight scalloping, foveolae denser, more ovaloid on sides; sternum posterolaterally foevolate, medially mostly smooth with median strigulose strip; dorsum of abdominal segment 4 mostly smooth with abundant punctae, punctae deeper laterally, posterior margin with narrow band of longitudinal strigulae. Fore coxa transversely strigulose in lateral view; fore tarsus opposite strigil with single stout seta; metacoxal tooth elongate and triangular. Dorsum of thorax and abdominal segments 1-4 with scattered erect to subdecumbent hairs. Head, mesosoma, petiole, and gaster dark brown; mandibles, antennae, legs ferruginous.

Queen

Metrics (n = 1): HL 1.02, HW 0.93, ML 0.54, SL 0.81, ED 0.15, WL 1.54 mm. CI 0.91, SI 0.87, MI 0.58, OI 0.16. Mesosoma foveolate in lateral view; mesoscutum strigulose-puncate; scutellum smooth with scattered punctae; propodeal dorsum densely foveolate. Dorsum of petiolar node foveolate with median smooth area; punctures on postpetiolar dorsum smaller in diameter than on workers.

Type Material

Holotype worker. India, Meghalaya, Khasi Hill, 1000m, Mawsynram to Balat, 27-x-1978, C. Besuchet & I. Löbl 30b. Deposited in Australian National Insect Collection. Paratypes. One dealate queen on same pin as holotype, in ANIC. Two workers in ANIC, 2w in Museum of Comparative Zoology with same data as holotype. Two workers in ANIC from India, Meghalaya, Khasi Hills, 700m, Nongpoh, 5-xi-1978, C. Besuchet & I. Löbl 42.

Etymology

The species name is derived from the name of the type collection site in the Indian state of Meghalaya.

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 125, fig. 28 worker, queen described)