Trichomyrmex chobauti

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Trichomyrmex chobauti
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Trichomyrmex
Species group: destructor
Species: T. chobauti
Binomial name
Trichomyrmex chobauti
(Emery, 1896)

Monomorium chobauti casent0904606 p 1 high.jpg

Monomorium chobauti casent0904606 d 1 high.jpg

Specimen Labels

Subspecies
Synonyms

No information has been published about the biology of Trichomyrmex chobauti.

Identification

Sharaf et al. (2016) - Trichomyrmex chobauti is closest to Trichomyrmex almosayari and Trichomyrmex lameerei. All three species share the abundant long ammochaete J-shaped hairs that form a distinct psammophore on the underside of the head. Trichomyrmex chobauti can be readily separated from T. almosayari by the bicoloured body, the oval eyes, and the straight or feebly concave posterior margin of the head. From T. lameerei it can be distinguished by the smaller size, the longer antennal scapes that reach the posterior margin of the head, and the unsculptured posterior half of the head.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Saudi Arabia, United Arab Emirates.
Palaearctic Region: Algeria (type locality).

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Biology

Castes

Nomenclature

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

  • chobauti. Holcomyrmex chobauti Emery, 1896j: 418, fig. (w.) ALGERIA. Délye, 1961: 69 (q.m.). Combination in Monomorium: Emery, 1908h: 672; in M. (Equestrimessor): Santschi, 1919d: 92; in Trichomyrmex: Ward et al., 2014: 16. Senior synonym of faf: Emery, 1922e: 176. See also: Bolton, 1987: 297. Current subspecies: nominal plus ajjer.
  • faf. Holcomyrmex faf Forel, 1902a: 151 (q.m.) ALGERIA. Combination in Monomorium: Emery, 1908h: 673. Junior synonym of chobauti: Emery, 1922e: 176.

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

Description

Worker

Sharaf et al. (2016) - TL 3.27; HL 0.88; HW 0.88; SL 0.72; EL 0.16; ML 1.22; PW 0.45; PTL 0.28; PTW 0.30; PPL 0.25; CI 100; El 18; SI 82.

Head. As long as broad, with feebly concave posterior margin and weakly convex sides; anterior clypeal margin distinctly concave; eyes of moderate size (EL 0.18 × HW) with 11 ommatidia in longest row; scapes when laid back from their insertions reach posterior margin of head.

Mesosoma. Promesonotum convex in profile, running back to straight mesonotum; metanotal groove impressed; propodeal dorsum nearly twice as long as declivity in profile; propodeal spiracle circular, situated above midline of propodeum in profile.

Petiole. Petiolar node rounded in profile.

Postpetiole. Node low and broad in profile.

Pilosity. Underside of head with long ammochaete J-shaped hairs forming a distinct psammophore; cephalic dorsum with sparse suberect hairs directed inward to midline of head; antennae with dense appressed pubescence; anterior clypeal margin with abundant long curved hairs; pilosity on mesosoma restricted to two or three pairs of hairs on pronotum and promesonotum; sparse decumbent pubescence on mesonotal and propodeal dorsum; petiole and postpetiole bare; gastral tergites with sparse appressed pubescence, few longer pairs of hairs present at gastral apex.

Sculpture. Clypeus, mandibles, and cephalic surface between frontal carinae and in front of eyes longitudinally rugulose; promesonotum and mesonotum faintly longitudinally rugulose; propodeum and sides of mesonotum, petiole and postpetiole densely punctulate-reticulate, gaster smooth and shining.

Colour. Head, mesosoma, petiole and postpetiole reddish brown, gaster dark brown.

Type Material

Sharaf et al. (2016) - Algeria: Palearctic. Syntype worker (Museo Civico di Storia Naturale, Genoa) (CASENT0904606) [examined].

References