Polyrhachis pelecta
Polyrhachis pelecta | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Formicidae |
Subfamily: | Formicinae |
Tribe: | Camponotini |
Genus: | Polyrhachis |
Subgenus: | Aulacomyrma |
Species: | P. pelecta |
Binomial name | |
Polyrhachis pelecta Kohout, 2007 |
Nothing is known about the biology of Polyrhachis pelecta.
Identification
Kohout (2007) - P. pelecta is rather close to Polyrhachis geometrica but differs in having the pronotal teeth broad-based, the lateral propodeal margins feebly dentate posteriorly, the dorsal margin of the petiolar node more-or-less entire and the first gastral segment with very fine striations confined to its sides. In contrast, the pronotal teeth in geometrica are distinctly smaller and more acute, the propodeum smoothly rounds into the declivity, the dorsal margin of petiolar node is distinctly medially emarginate and the whole surface of first gastral segment is distinctly and finely, striate.
Keys including this Species
Distribution
Distribution based on Regional Taxon Lists
Indo-Australian Region: New Guinea (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
Estimated Abundance
Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
Biology
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Castes
Known only from the worker caste.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- pelecta. Polyrhachis (Aulacomyrma) pelecta Kohout, 2007a: 233, figs. 91, 94, 97 (w.) NEW GUINEA.
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. 5.49; HL 1.47, 1.43; HW 1.28, 1.28; CI 87, 89; SL 1.50, 1.50; SI 117, 117; PW 1.12, 1.12; MTL 1.43, 1.40 (2 measured).
Anterior clypeal margin arcuate, entire; slightly sinuate in profile. Frontal triangle indistinct. Frontal carinae strongly sinuate, raised, with laminate lobes; central area relatively wide with rather distinct longitudinal carina formed by strongly raised median stria. Sides of head gently convex, only weakly converging anteriorly. Eyes convex, in full face view breaking lateral cephalic outline. Pronotal humeri armed with broad-based triangular teeth, that are shallowly concave dorsally between distinctly raised margins; lateral margins continued for some distance before merging with dorsal striae along sides. Promesosonal suture distinct; metanotal groove lacking. Mesonotal dorsum only partially marginate. Propodeal dorsum immarginate, with posterior angles weakly indicated. Petiole relatively narrow, as wide as high, with dorsal margin somewhat jagged; lateral spines short, slender, directed outwards and only slightly curved backwards. Anterior face of first gastral segment only shallowly concave medially at base.
Sculpture of head consisting of regularly spaced striae; mostly longitudinal, converging medially and anteriorly on clypeus and between frontal carinae. Pronotal dorsum with broadly open, inverse V-shaped striae. Sculpture of mesonotal-propodeal dorsa differing between holotype and paratype; striae in holotype forming incomplete semicircles, open inversely U-shaped posteriorly; in paratype striae strongly converging posteriorly and meeting along midline in V-shaped pattern. Dorsum of first gastral segment microscopically shagreened, becoming finely longitudinally striate towards sides.
Short, erect or semierect, off-white or yellowish hairs present in various densities on most body parts, except inferior edge of antennal scapes. Rather sparse, appressed pubescence everywhere; more dense on coxae and anterior face of petiole and propodeal declivity that is bordered laterally by very short, greyish, semierect fine hairs. Gastral dorsum with light cover of silvery pubescence not concealing underlying sculpture.
Black; antennae and legs dark to very dark reddish-brown. Mandibular masticatory borders, funiculi, tibiae, except proximal ends, and distal tarsal segments distinctly lighter.
Type Material
HOLOTYPE: PAPUA NEW GUINEA, Karubaka, Swart Valley, 03º35’S, 138º30’E, 1500m, 11.xi.1958, J. L. Gressitt (worker). PARATYPE: data as for holotype (1 worker). Type distribution: holotype in Museum of Comparative Zoology; paratype in Queensland Museum.
Etymology
Name derived from the Latin pellax, meaning deceitful or decoy, in reference to its close resemblance to Polyrhachis geometrica.
References
References based on Global Ant Biodiversity Informatics
- Janda M., G. D. Alpert, M. L. Borowiec, E. P. Economo, P. Klimes, E. Sarnat, and S. O. Shattuck. 2011. Cheklist of ants described and recorded from New Guinea and associated islands. Available on http://www.newguineants.org/. Accessed on 24th Feb. 2011.
- Kohout R.J. 2007. Revision of the subgenus Aulacomyrma Emery of the genus Polyrhachis F. Smith, with descriptions of new species (pp. 186-253). In Snelling, R.R., Fisher, B.L. & Ward, P.S. (eds). Advances in ant systematics: homage to E.O. Wilson 50 years of contributions. Memoirs of the American Entomological Institute 80: 690 pp.