Strumigenys carinithorax

Identification
Bolton (2000) – A member of the Strumigenys silvestrii-group. Very closely related to Strumigenys schmalzi, see notes there.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Paraguay, Suriname.

Nomenclature

 *  carinithorax. Strumigenys carinithorax Borgmeier, 1934: 103, fig. 4 (not 6 as stated); pl. 1, fig. 3 (w.q.m.) SURINAM. See also: Brown, 1959f: 29; See also: Bolton, 2000: 551.

Worker
Bolton (2000) - TL 1.5-1.6, HL 0.36-0.40, HW 0.28-0.31, CI 76-80, ML 0.19-0.22, MI 55-56, SL 0.20-0.24, SI 73-78, PW 0.20-0.22, AL 0.38-0.41 (5 measured).

Mandible with preapical tooth separated from apicodorsal tooth by a distance approaching, or very slightly exceeding, its own length. A minute preapical denticle also present, just proximal of midlength of mandible. Scape with distinct subbasal bend, the curved hairs on its leading edge spatulate and the longest of them about equal to the maximum width of the scape. Ground-pilosity of head spatulate; apicoscrobal hair elongate and fine; cephalic dorsum with a pair of short simple erect hairs close to occipital margin. Pronotal humeral hair, and pair of hairs on the mesonotum, elongate and fine; ground-pilosity of promesonotum narrowly spatulate. Pilosity of first gastral tergite mainly of short curved simple hairs that are fine and soft, mostly strongly inclined and arched toward the midline. In amongst these hairs may be a few longer more erect fine hairs. Mesonotum with a median fine longitudinal carina whose degree of development is variable and sometimes indistinct. Petiole node in profile without spongiform tissue ventrally; lateral spongiform lobe minute to vestigial, at most represented by a slight apical expansion of the posterior collar; height of anterior face of node greater than length of its dorsum (excluding posterior collar). In dorsal view petiole node broader than long. Disc of postpetiole with weak superficial sculpture, variable in intensity but disc never reticulate-punctate, sometimes almost smooth. Basigastral costulae sharply defined, at least as long as postpetiole disc and usually longer.

Type Material
Bolton (2000) - Syntype workers, queens and males, SURINAM: Paramaribo (G. H. Bunzli) [examined].