Gnamptogenys solomonensis

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

Gnamptogenys solomonensis casent0179950 p 1 high.jpg

Nothing is known about the biology of Gnamptogenys solomonensis.

Identification

Lattke (2004) - The only other Gnamptogenys with a trilobed sternal postpetiolar process is Gnamptogenys albiclava, which has a process with an anterior concave margin, with two lateral lobes and a small median denticle. The broad metanotal sulcus and bulging compound eyes with relatively large ommatidia of G. solomonensis make it easy to recognize.

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Solomon Islands (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 solomonensis. 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

Nomenclature

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

  • solomonensis. Gnamptogenys solomonensis Lattke, 2004: 69, fig. 15 (w.q.) SOLOMON IS.

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

Frons with longitudinal costulae; eyes subglobulose, ommatidia relatively large. Dorsal margin of mesosoma with anterior convexity in lateral view formed by promesonotum, abruptly ending at broad and concave metanotal sulcus. Postpetiolar process V-shaped in anterior view, with two lateral denticle-like lobes connected in varying degrees to lower intermediate lobe by ridges; metacoxal dorsum unarmed.

Type Material

Description

Worker

Lattke 2004 Gnamptogenys fig 13-15

Metrics. [Holotype] Paratypes (n = 5): HL [0.81] 0.83-0.88, HW [0.61] 0.61-0.66, ML [0.39] 0.41-0.44, SL [0.89] 0.91-1.05, ED [0.16] 0.17-0.18, WL [1.05] 1.05-1.18 mm. CI [0.75] 0.73-0.76, SI [1.44] 1.49-1.60, MI [0.64] 0.64-0.67, OI [0.26] 0.26-0.31. Head elongate in frontal view, oval and wider posteriorly than anteriorly, posterior margin with median concavity; clypeal lamella angular medially; occipital ridge present, no lobe or lamella; vertex relatively flattened, mostly smooth with few small strigulae; frons longitudinally costulate with sparse piligerous punctae, medially with longitudinal sulci that anastomize laterally; frontal lobe with flattened dorsal surface, exposing dorsal lobe of torulus; scape surpasses posterior cephalic margin by more than two apical widths, shaft relatively straight with slight preapical thickening, dorsum smooth; first funicular segment approximately twice as long as wide; scape with subdecumbent hairs, pubescence absent; frons with longitudinal strigulae and some punctae; clypeus mostly smooth, with brief longitudinal strigulae posteriorly and anteriorly. Eye not reduced, cross section subglobulose, ommatidia large. Mandibular dorsum mostly smooth with sparse punctures, masticatory border finely denticulate.

Pronotum smooth, with sparse piligerous punctulae, anterolaterally with few strigulae; pronotum with bluntly angular anteroventral corner in lateral view, ventral sulcus present; mesonotum, sides and dorsum of propodeum with shallow transverse strigulae; anepisternum trapezoidal, relatively narrow, distinctly delimited; katepisternum mostly smooth with low rugulae. Dorsal margin of mesosoma with anterior convexity in lateral view formed by promesonotum, abruptly ending at broad and concave metanotal sulcus; promesonotal suture distinctly impressed as fine line; propodeal dorsal margin broadly convex in lateral view, declivity relatively straight; propodeal spiracle separated by less than one spiracular diameter from declivity in lateral view. Petiole erect in lateral view, dorsal margin shorter than height of anterior margin, spiracle slightly below anterolateral process, anterior crest present; subpetiolar process triangular, projecting anteriorly in lateral view, ventral edge narrow; petiole and gaster mostly smooth, some undulations and strigulae may be present on anterior dorsum of petiole; postpetiolar process V-shaped in anterior view, with two lateral denticle-like lobes connected in varying degrees to lower intermediate lobe by ridges, projecting anterad. Fore coxae smooth laterally; basal fore tarsal segment dorsally smooth, ventrally with single stout seta opposite of strigil; second fore tarsal segment with four stout apical setae; metacoxal dorsum unarmed. Dorsum of thorax, and abdominal segments 1-4 usually with scattered erect to subdecumbent hairs. Body ferruginous brown; mandibles and legs beige to pale yellow; antennae and coxae orange.

Queen

Metrics ( n=2 ): HL 0.80, 0.89; HW 0.59, 0.66; ML 0.35, 0.40; SL 0.84, 1.01; ED 0.17, 0.21; WL 1.00, 1.21 mm. CI 0.74, 0.61; SI 1.43, 1.54; MI 0.59, 0.61; OI 0.29, 0.31. Pronotum with low transverse strigulae along anterior margin, rest mostly smooth with sparse shallow punctae; meso- and metanotum longitudinally strigulose, axillae punctate; propodeal dorsum transversely strigulose, declivitous face smooth.

Type Material

Holotype worker. Solomon Islands, Kolombangara Island, E Kuzi, 305m, 3-9-1965, P.M. Greenslade. Deposited in Australian National Insect Collection. Paratypes. One worker and one dealate queen with same data as holotype deposited in ANIC.

Etymology

The species name is derived from the name of the collection locality.

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 69, fig. 15 worker, queen described)