Strumigenys prosopis

Known from a small number of litter-samples from rainforest habitats.

Identification
Bolton (2000) – A member of the prosopis complex in the Strumigenys lyroessa-group. See Strumigenys panopla.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Indonesia, Malaysia.

Nomenclature

 *  prosopis. Strumigenys prosopis Bolton, 2000: 875, fig. 464 (w.) WEST MALAYSIA.

Worker
Holotype. TL 1.7, HL 0.48, HW 0.38, CI 79, ML 0.15, MI 31, SL 0.20, SI 53, PW 0.22, AL 0.46. Characters of prosopis-complex. Dorsolateral margin of head with narrowly spoon-shaped curved hairs on upper scrobe margin to level of apex of scrobe; these hairs similar in shape and size to those on leading edge of scape. Posterior to this are shorter, narrower hairs that are more strongly appressed; there is no apicoscrobal hair. Cephalic dorsum with a single standing hair at apex of each occipital lobe, otherwise standing hairs absent. Pronotal humeral hair absent. Dorsum of promesonotum and waist segments without standing hairs. Propodeal declivity with a broad lamella whose posterior margin is confluent with the propodeal tooth to its apex. First gastral tergite with a single pair of erect stiff hairs, near the base. Cephalic dorsum finely and weakly reticulate-punctate, the entire dorsal alitrunk smooth. Dorsum of petiole node unsculptured.

Paratype. TL 1.7-1.8, HL 0.48-0.49, HW 0.38-0.39, CI 78-81, ML 0.15-0.16, MI 31-33, SL 0.20-0.22, SI 53-56, PW 0.22-0.24, AL 0.45-0.50 (3 measured).

Dimensions of non-paratypic workers. HL 0.50-0.52, HW 0.39-0.44, CI 78-84, ML 0.16-0.17, MI 31-34, SL 0.22-0.23, SI 53-56. In some but not all of these the gaster lacks the basal pair of hairs; these may have been lost by abrasion.

Type Material
Holotype worker, Malaysia: Negri Sembilan, Pasoh For. Res., iii.-iv.1994, litter sample, no. 130 (Brendell, Jackson & Ficken). Paratypes. 2 workers with same data as holotype but litter sample, no. 83; 1 worker with same data but litter sample, no. 86; I worker with same data but fog sample, no. 2-8 (BMNH, ).

Determination Clarifications
This species was referred to as Strumigenys sp. 1 and sp. A in Bolton, 1998b: 92, 95.

References based on Global Ant Biodiversity Informatics

 * Pfeiffer M., and D. Mezger. 2012. Biodiversity Assessment in Incomplete Inventories: Leaf Litter Ant Communities in Several Types of Bornean Rain Forest. PLoS ONE 7(7): e40729. doi:10.1371/journal.pone.0041089
 * Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58
 * Woodcock P., D. P. Edwards, T. M. Fayle, R. J. Newton, C. Vun Khen, S. H. Bottrell, and K. C. Hamer. 2011. The conservation value of South East Asia's highly degraded forests: evidence from leaf-litter ants. Phil. Trans. R. Soc. B. 366: 3256-3264.
 * Woodcock P., D.P. Edwards, T.M. Fayle, R.J. Newton, C. Vun Khen, S.H. Bottrell, and K.C. Hamer. 2011. The conservation value of South East Asia's highly degraded forests: evidence from leaf-litter ants. Phil. Trans. R. Soc. B 366: 3256-3264.