Strumigenys lyroessa

Known from rainforest and rubber plantations, with all specimens obtained from litter samples.

Identification
Bolton (2000) - A member of the lyroessa complex in the Strumigenys lyroessa-group. Three species within the lyroessa-complex lack a pronotal humeral hair and lack standing hairs on the dorsolateral margins of the mesonotum (Strumigenys aechme, lyroessa, Strumigenys tantilla). S. aechme separates from the other two by its lack of an apicoscrobal hair and its distinctive gastral pilosity. S. lyroessa is smaller than tantilla (compare measurements) and has remiform rather than spatulate hairs on the first gastral tergite.

Distribution based on Regional Taxon Lists
Oriental Region: Bhutan, India, Sri Lanka. Palaearctic Region: China.

Nomenclature

 *  lyroessa. Labidogenys lyroessa Roger, 1862a: 251, pl. 1, fig. 17 (w.) SRI LANKA. Combination in Strumigenys: Roger, 1863b: 40; in Labidogenys: Brown, 1948e: 103; in Strumigenys: Bolton, 1995b: 397. See also: Bolton, 2000: 872.

Worker
Bolton (2000) - TL 2.0-2.1, HL 0.47, HW 0.80, CI 80, ML 0.16-0.18, MI 27-32, SL 0.24, SI 51, PW 0.28-0.30, AL 0.54-0.55 (2 measured). Characters of lyroessa-complex. Upper scrobe margin and leading edge of scape with small curved spoon-shaped hairs; those on the former smaller than those on the latter. Apicoscrobal hair short and stiff, slightly thickened apically; posterior to this the dorsolateral margin without projecting hairs. Cephalic dorsum without standing hairs except for one or two very short hairs at apex of occipital lobe. Pronotal humeral hair absent and dorsal alitrunk entirely lacking standing hairs. Posterior half of first gastral tergite with a few stiff hairs that are feebly remiform. Surface of first gastral tergite otherwise with inconspicuous, widely scattered minute appressed pubescence.

Type Material
Bolton (2000) - Holotype worker, SRI LANKA (no type-material known to exist).