Polyrhachis linae

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Polyrhachis linae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. linae
Binomial name
Polyrhachis linae
Donisthorpe, 1938

Polyrhachis linae casent0903424 p 1 high.jpg

Polyrhachis linae casent0903424 d 1 high.jpg

Specimen Labels

Nothing has been published about the biology of Polyrhachis linae.

Identification

Polyrhachis linae is somewhat simlar to Polyrhachis debilis, but it differs by its larger size and more steeply convex pronotum that is widest just behind the narrowly rounded humeri. The propodeal spines are short, but distinct. In contrast, specimens of Polyrhachis debilis are distinctly smaller with a weakly convex pronotal profile. The pronotal humeri are widely rounded and the propodeal spines very short, present as tuberculae or completely absent. (Kohout 2006)

Keys including this Species

Distribution

From Kohout (2006): Polyrhachis linae appears to be a rather uncommon, but widespread, New Guinean species with several colonies collected recently by R. Snelling at the Lakekamu Basin (Gulf Prov., Papua New Guinea).

Distribution based on Regional Taxon Lists

Indo-Australian Region: New Guinea (type locality).

Check distribution from AntMaps.

Distribution based on specimens

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The above specimen data are provided by AntWeb. Please see Polyrhachis linae for further details

Biology

Castes

Nomenclature

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

  • linae. Polyrhachis (Cyrtomyrma) linae Donisthorpe, 1938c: 262, fig. 12 (w.q.) NEW GUINEA. See also: Kohout, 2006b: 131.

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

Description

Worker

Black, shining; legs dark brown, anterior tibial lighter, antennal, coxae, and tarsi black, palpi yellow, claws red. Usual reticulation and small scattered punctures, but the epimera of thorax and base of front of scale almost rugosely punctured, the anterior portion of the latter transversely striate.

Head transverse posteriorly, posterior angles distinct; mandibles finely punctured and longitudinally striate, the punctures large near the teeth, furnished with sharp teeth, the small tooth at the corners of the slightly projecting anterior margin of clypeus small, but: sharp and distinct. Thorax convex, anterior angles of pronotum rounded, broadest a little before the centre; pro-mesonotaZ suture well marked, meso-epinotal suture faintly indicated; epinotum armed with two short sharp spines projecting outwards and upwards; the declivity of the epinotum is somewhat abrupt and about as long as the anterior surface; scale armed with four short teeth of about equal length, the centre ones nearer to each other than to the lateral ones.

Long. 6·2 mm.

Queen

Similar to worker, puncturation of head stronger; spines on epinotum and scale blunter. Wings dusky; pterostigma and veins yellow.

Long. 7·6 mm.

Male

Type Material

Syntype workers, queens The Natural History Museum and Queensland Museum – as reported by Kohout (2006).

Type Locality Information

NEW GUINEA, Cyclops Mts, Mt Lina, 3500 ft. Five workers and three winged females taken by Miss L. E. Cheesman, February 1936.

References

  • Donisthorpe, H. 1938c. The subgenus Cyrtomyrma Forel of Polyrhachis Smith, and descriptions of new species, etc. Ann. Mag. Nat. Hist. 11(1): 246-267 (page 262, fig. 12 worker, queen described)
  • Kohout, R. J. 2006. Review of Polyrhachis (Cyrtomyrma) Forel (Hymenoptera: Formicidae: Formicinae) of Australia, Borneo, New Guinea and the Solomon Islands with descriptions of new species. Memoirs of the Queensland Museum. 52:87-146.