Polyrhachis dorowi

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Polyrhachis dorowi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. dorowi
Binomial name
Polyrhachis dorowi
Kohout, 2009

Polyrhachis dorowi casent0217427 p 1 high.jpg

Polyrhachis dorowi casent0217427 d 1 high.jpg

Specimen Labels

The type material was found in a lowland rainforest, with a nest made between leaves.

Identification

Kohout (2009) - Polyrhachis dorowi is characterised by the highly arched mesosoma and steeply rising anterior face of pronotal dorsum with its summit just before the promesonotal suture.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Kohout (2009) - Males and immature stages (eggs, larvae and pupae) deposited in the QMBA spirit collection.

Nomenclature

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

  • dorowi. Polyrhachis dorowi Kohout, 2009b: 39, figs. 1, 4, 5 (w.q.m.) AUSTRALIA.

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

Description

Worker

(holotype cited first): TL c. 6.00, 5.14-6.25; HL 1.53, 1.34-1.56; HW 1.50, 1.22-1.53; CI 98, 91-98; SL 1.87, 1.65-1.93; SI 125, 124-135; PW 1.18, 1.03-1.25; MIL 2.15, 1.84-2.18 (24 measured).

Mandibles with five teeth. Anterior clypeal margin with truncate, medially notched central flange, laterally flanked by acute denticles. Clypeus in profile straight or very weakly convex, posteriorly rounding into moderately impressed basal margin. Frontal triangle weakly indicated. Frontal carinae sinuate with margins moderately raised at mid-length, rather flat anteriorly and posteriorly; central area with moderately impressed frontal furrow. Sides of head in front of eyes weakly convex towards mandibular bases; behind eyes rounding into moderately convex occipital margin. Eyes relatively large, convex, in full-face view clearly breaking lateral cephalic outline. Ocelli lacking. Pronotum in lateral view with anterior face rising very steeply towards narrow summit situated in front of strongly impressed promesonotal suture. Pronotal humeri in dorsal view rounded with greatest width of pronotum just before mid-length of segment. Mesosomal dorsum steeply descending towards propodeal declivity; metanotal groove lacking. Petiole relatively low, virtually triangular in lateral view with anterior and posterior faces weakly convex; dorsal margin armed with four spines, dorsal pair short, close together and broad-based, lateral pair diverging, slender and more acute. Subpetiolar process acute anteriorly, narrowly rounded posteriorly. Anterior face of first gastral segment about as high as full height of petiole, widely rounding onto dorsum of gaster.

Mandibles very finely, longitudinally striate with numerous piliferous pits. Dorsum of head, mesosoma and gaster finely shagreened. Intensity of mesosomal sculpturation distinctly increasing laterally with lower portions of pronotum, meso- and metapleurae rather strongly reticulate-rugose. Petiole mostly transversely wrinkled dorsally, becoming reticulate-rugose near base. Mandibular masticatory borders with numerous curved hairs. Anterior clypeal margin medially with a few golden setae and several shorter setae fringing margin laterally. A few pairs of longer hairs arising near anterior and basal clypeal margins, along frontal carinae, on vertex and anterior face of frontal coxae. Tuft of long, variously curved hairs, not exceeding greatest diameter of eye in length, situated on summit of mesonotum. Numerous, distinctly shorter hairs arising along margins of segments and around apex of gaster.

Black; mandibular teeth, extreme tip of apical antennal segment and most of legs reddish-brown; proximal part of tibiae and tarsi black.

Queen

TL c. 7.51-8.01; HL 1.72-1.81; HW 1.53-1.64; CI 88-91; SL 2.00-2.12; SI 122-133; PW 1.68-1.84; MTL 2.37-2.59 (5 measured).

Closely resembling worker and apart of sexual characters differing as follows: eyes only moderately convex, in full face view just breaking lateral cephalic outline; pronotal humeri subangular; mesoscutum in dorsal view wider than long with lateral margins converging anteriorly into broadly rounded anterior margin; median line bifurcate dorsally. In lateral view mesoscutum relatively high with anterior margin widely rounding onto flat dorsum; parapsides rather flat anteriorly, weakly raised posteriorly; mesoscutellum in profile weakly convex, moderately elevated above dorsum of mesosoma; metanotal groove distinct; propodeum with rudimentary tubercles; propodeal dorsum convex in profile evenly descending into vertical declivity. Body sculpturation, pilosity and colour as in worker.

Type Material

Holotype worker, Australia (Queensland): Cape York Peninsula, Lockerbie Scrub, l0°46'S, l42°29'E, 23-26.ix.2003, lowland rf., ex nest between leaves, W.H.O. Dorow (RJK ace. 03.10). Paratypes: 55 workers, same data as holotype; 29 workers, 5 queens, 9 males, same data as holotype except 19-23.iii.l987 (RJK aces 87.36, 37, 44, 51, 66, 68). Holotype (QMT 152066) and most paratypes in Queensland Museum; 3 paratype workers and paratype queen in Australian National Insect Collection; 2 paratype workers each in The Natural History Museum, California Academy of Sciences, Museum of Comparative Zoology, Musee d'Histoire Naturelle Genève, Berlin Museum für Naturkunde der Humboldt-Universität, Naturhistorisches Museum Wien, Vienna, National Museum of Natural History and SMFG.

Etymology

After the collector of the type series, Dr Wolfgang H. O. Dorow of the Senckenberg Institute, Frankfurt am Main, Germany.

References

  • Kohout, R.J. 2009b. A new species and nomenclatural changes in the subgenus Polyrhachis (Cyrtomyrma) Forel. Australian Entomologist. 36:37-48.