Strumigenys cygarix

One of the few known specimens was collected from sifted litter in wet forest.

Identification
Bolton (2000) - A member of the cygarix complex in the Strumigenys caniophanes-group. Four species in the group lack preapical dentition on the mandible, Strumigenys caniophanes, Strumigenys heteropha, cygarix and Strumigenys dromica. Of these only cygarix has conspicuous appressed pubescence on the first gastral tergite between the bases of the flagellate main pilosity.

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

Nomenclature

 *  cygarix. Strumigenys cygarix Bolton, 2000: 755 (w.) BORNEO.

Worker
Holotype. TL 2.4, HL 0.62, HW 0.46, CI 74, ML 0.31, MI 50, SL 0.38, SI 83, PW 0.28, AL 0.63. Mandible in full-face view without preapical dentition. Dorsolateral margin of head in full-face view with 4 freely laterally projecting fine flagellate hairs; one in front of level of eye, one at level of eye, one in apicoscrobal position and one closer to the occipital corner. A second row of 4-5 shorter hairs occurs on the dorsal surface of the dorsolateral margin; these are directed dorsally and slightly laterally. Cephalic dorsum with standing hairs present from level of eye to occipital margin. Dorsum of head finely densely reticulate-punctate, also with weakly defined reticulate-rugulose sculpture. Dorsal alitrunk coarsely densely punctate. Side of alitrunk densely punctate to. punctate-shagreenate everywhere. Pronotal humeral hair long and flagellate, longer than 0.50 X SL. Dorsal alitrunk with fine simple standing hairs, the dorsolateral margins also with longer flagellate hairs. Waist segments and first gastral tergite with fine flagellate hairs; surface of first gastral tergite between the hairs quite densely covered with appressed fine gray pubescence. Dorsal, lateral and ventral surfaces of femora with standing fine hairs; dorsal (outer) surfaces of middle and hind tibiae and basitarsi also with much longer flagellate hairs. Propodeal teeth short, stoutly triangular. Petiole in dorsal view broader than long; both petiole and disc of postpetiole densely sculptured. Node of petiole in profile with a steeply ascending anterior face. Basigastral costulae shorter than length of postpetiole disc.

Paratypes. TL 2.2, HL 0.60, HW 0.42-0.44, CI 70-73, ML 0.28-0.30, MI 47-50, SL 0.36, SI 82-86, PW 0.26, AL 0.58 (2 measured).

Type Material
Holotype worker, Malaysia: Sarawak, confl. Suan Oyan and Mujong riv., E Kapit, 150 m., 19.v.1994, #6a (Lobl & Burckhardt).

Paratypes. 2 workers with same data as holotype.

References based on Global Ant Biodiversity Informatics

 * Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
 * 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.0041073
 * 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