Calyptomyrmex asper

Distribution
This taxon was described from Borneo.

Biology
This species is known from a single specimen. Nothing is known regarding its biology.

Description
Types. Holotype worker from Nanga Tekalit Camp, Sarawak, Malaysia, 14 February 1963, A. E. Emerson (ANIC32-051667). Diagnosis. Hairs on head and body thin (essentially the same width along entire length, or only slightly and gradually expanded distally, and with blunt tips), propodeum lacking spines, gaster weakly (and sometimes indistinctly) punctate, and body larger (HW > 1.05mm). This combination of characters will separate this species from all others considered in this study. For separation from the similar ryderae, see Diagnosis under that species. Worker description. Lateral margins of head in full-face view relatively strongly diverging posteriad. Mandibles indistinctly striate, more strongly basally, less so apically. Eyes with 4–5 ommatidia in greatest diameter. Propodeum in lateral view lacking angles or spines (slight convexities are present on the propodeum in the vicinity of the angle, but these are extensions of the lateral propodeal rugae and are not true spines). Propodeal lobes thin anteriorly, thickened posteriorly. Node of petiole in profile higher and much larger than that of postpetiole, its anterior angle broadly rounded between the anterior and dorsal faces. In dorsal view the petiolar node slightly narrower than the postpetiolar node. Head, mesosoma, and petiolar and postpetiolar nodes with heavy, deep, wavy rugae, the entire surface (including the rugae) indistinctly sculptured and with a matte appearance. Gaster finely and indistinctly sculptured. Hairs on head and body erect and expanded slightly distally, their tips either blunt or slightly convex (but never rounded). Clypeal fork with both enlarged and thin hairs, the thin hairs longer. Colour dull redbrown, antennae and legs slightly lighter. Measurements. Worker (holotype) - CFW 0.12; CI 105; HL 1.00; HW 1.06; ML 1.05; MTL 0.51; PetI 115; PetL 0.31; PetW 0.36; PronW 0.67; SI 55; SL 0.59.