Gnamptogenys fontana

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

Gnamptogenys fontana casent0900558 p 1 high.jpg

Gnamptogenys fontana casent0900558 d 1 high.jpg

Specimen Labels

A collection of this ant was taken from a wet forest litter-sample.

Identification

Lattke (2004) - This species may be confused with Gnamptogenys binghamii, but in lateral view the occipital lamella in G. binghamii is much narrower, its eyes are not as protuberant, and the ridges between the foveolae are sharply crested, not rounded as in G. fontana. The acute posterior angle of the subpetiolar process in G. fontana is not found in G. binghamii and the setae opposite the fore tarsal strigil in G. binghamii tend to be more slender than in G. fontana. Gnamptogenys gabata is different in the sharp angles separating the concave posterior cephalic margin from the sides when seen in frontal view, while in G. fontana the posterior cephalic margin is relatively straight and the occipital lamella is inconspicuously visible in the background as a pair of small horns. G. gabata has smaller eyes, and the anterior margin of the clypeal lamella forms an obtuse and blunt median angle. The subpetiolar process of G. gabata is more triangular, without an acute posterior angle, and the propodeum has prominent posterolateral crests.

Distribution

Distribution based on Regional Taxon Lists

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


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Queens and males are unknown.

Nomenclature

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

  • fontana. Gnamptogenys fontana Lattke, 2004: 108, fig. 22 (w.) BORNEO.

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

Head subquadrate in frontal view, lateral margins broadly convex gradually curving onto broadly concave posterior margin, anterior margin of clypeal lamella forming very obtuse blunt angle. Occipital lamella relatively broad, convex, anterior extremely curved, posterior extremely angular.

Description

Worker

Lattke 2004 Gnamptogenys fig 22-24

Metrics. [Holotype] Paratype: HL [1.11] 1.11, HW [0.95] 0.92, ML [0.62] 0.58, SL [1.01] 0.98, ED [0.25] 0.22, WL [1.54] 1.54 mm. CI [0.86] 0.83, SI [1.06] 1.07, MI [0.65] 0.63, OI [0.26] 0.24. Head subquadrate in frontal view, lateral margins broadly convex gradually curving onto broadly concave posterior margin, anterior margin of clypeal lamella forming obtuse blunt angles laterally, medially with modest convex lobe; frons mostly foveolate over smooth cuticle, frons rugulosefoveolate; frontal lobe evenly convex, barely covering radicle; clypeus longitudinally strigulose with broad smooth areas; foveolae on cephalic sides denser than on dorsum; occipital lamella broad and convex, anterior end curved, posterior end angular. Scape mostly smooth with scattered punctae and occasional strigulae.

Mesosoma mostly foveolate over smooth cuticle in lateral view; mesosomal dorsum foveolate, with smooth area on posteromedian pronotum and part of mesonotum; promesonotal suture poorly impressed, sometimes present as transverse series of punctulae, laterally indistinct; metanotal sulcus well impressed; metapleuron posteroventrally with transverse ridges; propodeal declivity concave with raised posteromedian area. Petiolar node with anterior margin longer than posterior margin in lateral view; dorsum foveolate over smooth cuticle; ventral process subquadrate with acutely angular posterior corner; postpetiolar dorsum mostly smooth with scattered piligerous punctae, punctae deeper and more elongate posterad, posterior margin with narrow band of longitudinal strigulae; foveolae on postpetiolar sides deeper than on dorsum; postpetiolar sternum with low transverse strigulae; dorsum of abdominal segment 4 mostly smooth with piligerous punctulae, posterolaterally with narrow band of longitudinal striae and brief carinae anterad of spiracle. Fore coxa transversely strigulose in lateral view; fore tarsus opposite strigil with row of stout setae; metacoxal tooth straight, without lateral ridge. Dorsum of thorax and abdominal segments 1-4 with scattered erect to subdecumbent hairs. Head, mesosoma, petiole, and gaster black; mandibles, antennae, legs brown.

Type Material

Holotype worker. Malaysia, Sabah, Poring Hot Springs, 900m, 12-v-1987, D. Burckhardt & I. Löbl 22a. Deposited in Musee d'Histoire Naturelle Genève. Paratype. One worker on same pin as holotype in Musee d'Histoire Naturelle Genève. The holotype of G. fontana is the top specimen on the pin and has the point marked in red.

Etymology

The species name is derived from the Latin term for "of a spring," fontanus, which itself is derived from fons (m.) and alludes to the type locality, Poring Hot Springs.

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 109, fig. 22 worker described)