Tetramorium rogatum

Only known from the type locality.

Identification
The clavate pilosity of Tetramorium rogatum is unique in the species group and makes it easily identifiable.

A member of the Afrotropical edouardi species complex, which is part of the weitzeckeri species group.

Key to weitzeckeri-group species.

Distribution based on Regional Taxon Lists
Afrotropical Region: Angola.

Nomenclature

 *  rogatum. Tetramorium rogatum Bolton, 1980: 231, fig. 10 (w.) ANGOLA. See also: Hita Garcia, Fischer & Peters, 2010b: 35.

Worker
Hita Garcia et al. (2010) - HL 0.84, HW 0.76, SL 0.62, PW 0.60, WL 0.98, CI 90, SI 82, OI 23. [The holotype of T. rogatum and only known specimens of this species was not available for measuring. The measurements presented above are taken from Bolton (1980)].

Head longer than wide (CI 90). Anterior clypeal margin with small median notch. Frontal carinae strongly developed, less pronounced behind eye level and reaching posterior margin of head. Antennal scrobe shallow, narrow, and without defined posterior and ventral margins, ending before posterior margin of head. Antennal scape of moderate length, not reaching posterior margin of head (SI 82). Eyes of moderate size (OI 23). Propodeal spines long and spinose. Propodeal lobes small, triangular and acute. Petiolar node high nodiform, in dorsal view slightly wider and in profile higher than long. Postpetiole in dorsal view wider than long and more voluminous than petiole; in lateral view more rounded than petiole. Mandibles distinctly longitudinally rugose. Clypeus finely rugo-reticulate. Dorso-frontal area, as well as lateral part of head ventral to scrobe, mostly longitudinally rugose, but with abundant cross-meshes. Spaces between rugae and scrobal area usually unsculptured, ground sculpturation feeble. Mesosoma dorsally and laterally with distinct, mostly longitudinal, widely spaced rugulation, ground sculpturation nearly effaced, appearing smooth and shiny. Petiole and postpetiole longitudinally rugose. All dorsal surfaces of head, mesosoma, both waist segments and gaster with abundant, long suberect to erect hairs, especially on mesosoma and first gastral tergite, strongly clavate and truncated apically. Pubescence on tibiae and antennal scapes subdecumbent to decumbent. Coloration brown.

Type Material
Hita Garcia et al. (2010) - Holotype worker, ANGOLA, Bruco, 26.II.-2.III.1972 (A11), leg. P.M. Hammond [examined].

Additional References

 * Hita Garcia, F.; Fischer, G.; Peters, M. K. 2010. Taxonomy of the Tetramorium weitzeckeri species group (Hymenoptera: Formicidae) in the Afrotropical zoogeographical region. Zootaxa 2704:1-90.