Strumigenys tritomea

Identification
Bolton (2000) - A member of the Strumigenys chapmani-group. S. tritomea is unique in the group by its possession of a cuticular lamella on the inner margin of the mandible.

Distribution based on Regional Taxon Lists
Oriental Region: Cambodia, Thailand.

Nomenclature

 *  tritomea. Strumigenys tritomea Bolton, 2000: 770 (w.) THAILAND.

Worker
Holotype. TL 3.0, HL 0. 86, HW 0.73, CI 85, ML 0.32, MI 37, SL 0.38, SI 52, PW 0.33, AL 0.83. Mandible broad and flattened, inner margin with a straight-edged cuticular lamella that extends from base almost to apicodorsal tooth; inner edges of lamellae almost meet when mandibles fully closed. Apicodorsal tooth long and spiniform, subtended by two shorter spiniform teeth, the apicoventral of which is slightly longer than the apicomedian; these two teeth slightly rolled under the apicodorsal, not directly ventral to it. Space between apicomedian and apicoventral tooth with 1, or possibly 2, small intercalary teeth (difficult to see clearly in specimens available). Ventrolateral margin of head shallowly concave immediately in front of eye. Ventral surface of head with a broad shallow impression behind level of eyes. Dorsal surfaces of head and alitrunk densely reticulate-punctate (obscured by film of dirt in holotype). Pleurae and side of propodeum not reticulate-punctate. Petiole node reticulate-punctate; disc of postpetiole mostly smooth. Basigastral costulae shorter than length of postpetiole disc. Cephalic dorsum with a few short standing hairs along occipital margin, otherwise dorsum only with short spatulate ground-pilosity. Upper scrobe margin fringed with anteriorly curved short spatulate hairs and with a longer stouter apicoscrobal hair. Dorsal surfaces of promesonotum, waist segments and first gastral tergite with curved standing hairs that are stout and thickened to remiform apically; those on gaster longer than those on promesonotum but the latter somewhat more expanded apically. Long hairs that project from dorsal (outer) surface of hind basitarsus stiff stout and slightly curved, not flagellate.

Paratype. TL 3.0, HL 0.85, HW 0.71, CI 84, ML 0.33, MI 39, SL 0.38, SI 53, PW 0.33, AL 0.80.

Type Material
Holotype worker, Thailand: Wab Pang An, 3.xi.1985, 900 m., no. 3 (Lobl & Burckhardt).

Paratype. 1 worker with same data as holotype.