Polyrhachis wellmani

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Polyrhachis wellmani
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. wellmani
Binomial name
Polyrhachis wellmani
Forel, 1909

Polyrhachis wellmani casent0910902 p 1 high.jpg

Polyrhachis wellmani casent0910902 d 1 high.jpg

Specimen Labels

The biology is not known but its close resemblance and therefore affinities with Polyrhachis schistacea suggests they have similar life histories.

Identification

A member of the Polyrhachis militaris species-group. Bolton (1973) - This species is so closely related to Polyrhachis schistacea that it would have been synonymized had it not been for a single character which appears to be consistent, namely the lack of lateral petiolar teeth. In size wellmani lies towards the lower end of the schistacea range and it may be that a more detailed investigation of smaller schistacea specimens will show a gradual diminution of ·the lateral petiolar teeth until a wellmani-like condition is reached.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

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

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.

  • wellmani. Polyrhachis wellmani Forel, 1909b: 68 (w.) ANGOLA. Combination in P. (Myrma): Wheeler, W.M. 1922a: 1004. See also: Bolton, 1973b: 323.

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 8.3-8.7, HL 2.22-2.37, HW 1.74-1.85, CI 78, SL 2.74-2.81, SI 152-157, PW 1.40-1.48, MTL 2.92-3.00. (3 measured.)

Very similar to Polyrhachis schistacea. Clypeus with a more or less distinct, truncate lobe, the anterior margin of which has numerous notches from which stout hairs arise. Eyes convex; sides of head in front of eyes convex. Alitrunk marginate laterally throughout its length, interrupted at the sutures. Pronotum armed with a pair of long spines, propodeum with a pair of short, thick upcurved teeth. Promesonotal suture distinct; metanotal groove impressed. Petiole with only a single pair of spines, situated at the dorsolateral angles of the segment. The lateral pair completely absent. Anterior face of first gastral segment shallowly concave.

Entire body with numerous erect yellow-white or off-white hairs and a long, dense pubescence which in part hides the sculpturation, especially on the dorsum of the alitrunk.

Head with a fine longitudinal rugulation overlying a fine reticulo-puncturation. Dorsum of alitrunk similarly sculptured but with the puncto-reticulate part of the sculpturation more distinct on the pronotum than on the following segments on which the longitudinal regulation predominates. Gaster finely and densely reticulate-punctate.

Type Material

Bolton (1973) - Syntype workers, ANGOLA : Benguela (C. Wellman) (Musee d'Histoire Naturelle Genève) [examined].

References