Strumigenys eurycera group

eurycera-group

WORKER

Apical fork of mandible of 2 teeth, with a single intercalary denticle or small tooth. A single preapical tooth present, this tooth spiniform and longer than the maximum width of the linear mandible. MI 33-46.

Anterior clypeal margin broad, more or less transverse or with a very small median indentation.

Antenna with 4 segments. Scape slightly to extremely flattened; SI 60-70.

Preocular carinae broad and conspicuous in full-face view.

Scrobe short and shallow or vestigial behind level of eye; upper scrobe margin short and weakly defined or not defined behind level of eye, the dorsum rounding evenly into the side.

Ventrolateral margin of head in front of eye without a preocular notch or impression, weakly angular or rounding into ventral surface. Postbuccal groove extremely shallow to vestigial.

Propodeal dorsum more or less flat anteriorly but posteriorly abruptly angled downward and sloping steeply to the tooth; the latter short-triangular and subtended by a narrow carina on the declivity.

Spongiform lobes of waist segments present but lateral lobe of petiole small. Base of first gastral sternite almost bare or with a weak diffuse pad of spongiform tissue.

Pilosity. Variable but any standing hairs present are short and simple; no flagellate or bizarre pilosity. Pronotal humeral hair absent or present. Middle and hind tibiae and basitarsi without long projecting erect hairs. First gastral tergite with short simple hairs that are suberect to erect.

Sculpture. Head and alitrunk reticulate-punctate, sometimes with a smooth area on mesopleuron that may also extend on to metapleuron. Disc of postpetiole sculptured. Base of first gastral sternite with longitudinal costulae.