Gnamptogenys panda

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Gnamptogenys panda
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. panda
Binomial name
Gnamptogenys panda
(Brown, 1948)

The types were found in bamboo humus on a ridge summit. Individuals were observed moving slowing and freezing on disturbance.

Identification

Lattke (2004) - The frontal triangle of G. panda is deeper than in Gnamptogenys sichuanensis and Gnamptogenys taivanensis. These two species have broader, more triangular metacoxal teeth than G. panda and more regularly shaped strigulae on the propodeal declivity. The relatively broad lateroventral granulose area on the pronotum of G. panda is not found in G. sichuanensis or G. taivanensis.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Palaearctic Region: China (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 panda. 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.

  • panda. Stictoponera panda Brown, 1948a: 263 (w.) CHINA. Combination in Gnamptogenys: Brown, 1958g: 228. See also: Lattke, 2004: 219.

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

Lattke (2004):

Head with occipital lamella forming blunt point in lateral view; anterior clypeal margin with median convex to bluntly pointed lobe; humeral angles prominent, upturned with parallel posterior convexity.

Brown (1948) described the type locality as the summit of a ridge near Chao Kung Mountain between 1524 and 2286m, 1.5 days travel on foot west of Guan Xian (Kuanshien). Guan Xian (31/00'N 103/37'E) is in Sichuan. The ants were found in bamboo humus on a ridge summit and were observed as moving slowing, freezing on disturbance. Brown (1958) mentioned seeing additional specimens of G. panda, but study of these specimens showed them to be Gnamptogenys sichuanensis. G. panda is also mentioned in Wu and Wang (1992, 1995). Wang (1992) reported this species from an altitude of 1050m in the Wuling Mountains of southwestern China. The altitude on the USNM specimen label is partially illegible, probably 6000 ft. The altitude on the holotype label is also partially illegible and may be 7000 ft.

Description

Worker

Lattke 2004 Gnamptogenys fig 61-63

Lattke (2004) - Metrics. [Holotype] Paratype: HL [1.28] 1.24, HW [1.14] 1.11, ML [0.61] 0.64, SL [1.12] 1.09, ED [0.12] 0.11, WL [1.70] 1.60 mm. CI [0.89] 0.90, SI [0.98] 0.98, MI [0.54] 0.54, OI [0.11] 0.10. Head with broadly concave posterior margin in frontal view; anterior margin of clypeus with convex to bluntly pointed median lobe; clypeus longitudinally strigulose with shallow median sulcus, laterally and posteriorly strigulose-punctate; frontal triangle oval, laterally bordered by arching sulcus; head with occipital lamella forming blunt point in lateral view. Humeral angle prominent, upturned with parallel posterior convexity, pronotal dorsum irregularly strigose, pronotum irregularly strigose laterally, lateroventrally convex, dull and granulate sculpture separated from shiny rugosity by longitudinal crest at height of mesopleural sulcus, promesonotal suture distinct; mesonotum longitudinally strigulose; mesopleuron strigose, metapleuron longitudinally strigulose; propodeal declivity transversely strigulose, propodeal dorsum irregularly strigose. Mesosoma with convex dorsal margin in lateral view, pronotum slightly higher, with brief vertical drop to mesonotum, propodeal declivity concave.

Postpetiolar process forms two contiguous convexities in ventral view with brief posteromedian carinae; postpetiole and fourth abdominal sternite transversely strigulose-punctate, strigulae on side of fourth abdominal segment not as prominent as on dorsum; fore tarsal base with row of stout setae; procoxa laterally transversely strigulose. Dorsum of thorax and abdominal segments 1-4 with relatively short, scattered erect to subdecumbent hairs. Metacoxal tooth relatively low, apically parallel sided.

Type Material

Lattke (2004) - Holotype worker: China, Szechwan [Sichuan], Chao Kung Mt. (Brown) (Museum of Comparative Zoology) [Examined].

References

  • Brown, W. L., Jr. 1948a [1947]. A new Stictoponera, with notes on the genus (Hymenoptera: Formicidae). Psyche (Camb.) 54: 263-264 (page 263, worker described)
  • Brown, W. L., Jr. 1958g. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bull. Mus. Comp. Zool. 118: 173-362 (page 228, Combination in Gnamptogenys)
  • 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 219, fig. 61 worker described)