Polyrhachis cornuta

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Polyrhachis cornuta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Myrma
Species group: militaris
Species: P. cornuta
Binomial name
Polyrhachis cornuta
Stitz, 1910

Polyrhachis cornuta focol2575 p 1 high.jpg

Polyrhachis cornuta focol2575 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Polyrhachis cornuta.

Identification

A member of the Polyrhachis militaris species-group. Bolton (1973) - As stated by Stitz in the original description the structure of the petiole in this species is its most distinguishing character. The petiole form and shape of the head ally this species very closely to Polyrhachis phidias, whilst the overall build and sculpturation places the species firmly in the Polyrhachis fissa complex of the militaris-group. Differences from phidias include the sculpturation and the smaller size of that species.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Democratic Republic of Congo (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • cornuta. Polyrhachis cornuta Stitz, 1910: 150 (w.) DEMOCRATIC REPUBLIC OF CONGO. Combination in P. (Myrma): Wheeler, W.M. 1922a: 994. See also: Bolton, 1973b: 300.

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

Description

Worker

Bolton (1973) - TL 5.6, HL 1.42, HW 1.16, CI 82, SL 1.60, SI 138, PW 1.20, MTL 1.58.

Anterior clypeal margin arcuate and entire. Eyes convex, large and prominent. Sides of head in front of eyes more or less straight, somewhat convergent anteriorly. Behind the eyes the sides of the head almost straight, meeting the shallowly convex occipital margin almost in a right-angle. The eye itself is set in a somewhat impressed area upon the side of the head. Alitrunk marginate laterally throughout its length, the marginations interrupted at the sutures. Pronotum armed with a pair of broad, flattened, subtriangular spines; the propodeum with a pair of minute teeth. Promesonotal suture well developed; metanotal groove distinct and impressed. Dorsal surfaces of the constituent sclerites of the alitrunk convex. Petiole with a pair of short erect dorsal spines and an enormously developed pair of lateral horns which curve upwards, outwards and backwards around the base of the first gastral segment. These lateral spines are extremely thick at the base and taper apically. Anterior face of the first gastral segment concave medially.

All dorsal surfaces of the head and body with numerous long, erect hairs, which are however absent from the antennal scapes. Pubescence very fine and sparse, greyish, densest on the sides of the alitrunk and on the gaster.

Clypeus and gaster finely and densely superficially reticulate. Head, dorsum and sides of alitrunk, and anterior face of petiole longitudinally striate-rugose, more faintly so on the petiole than elsewhere.

Black, with legs, mandibles and apical six segments of the antennal funiculus brown or yellow-brown.

Type Material

Bolton (1973) - Holotype worker, CONGO (KINSHASA) : Kuako, Kimpoko (Buttner) (Berlin Museum für Naturkunde der Humboldt-Universität) [examined].

References