Strumigenys nastata

Identification
A member of the Strumigenys silvestrii-group.

Distribution based on Regional Taxon Lists
Neotropical Region: Costa Rica.

Nomenclature

 *  nastata. Strumigenys nastata Bolton, 2000: 554 (w.) COSTA RICA.

Worker
Holotype. TL 1.7, HL 0.42, HW 0.32, CI 76, ML 0.25, MI 60, SL 0.26, SI 81, PW 0.22, AL 0.42. Preapical tooth of mandible separated from apicodorsal by a distance about equal to its length; a small preapical denticle also present, just proximal of mandibular midlength. The distance separating the preapical and apicodorsal teeth is about the same as that separating the preapical tooth from the denticle. Scape with a pronounced subbasal bend; leading edge of scape with a projecting narrow cuticular lamella that arises proximal of the subbasal bend, follows its curvature, and peters out along the margin distal of the subbasal bend. Curved hairs on leading edge of scape narrowly spatulate, slightly shorter than maximum scape width. With head in full-face view the curved hairs that fringe the upper scrobe margins, and the cephalic ground-pilosity, narrowly spatulate. Apicoscrobal hair long, fine and flagellate. Cephalic dorsum with two pairs of fine short erect hairs; one pair close to highest point of vertex, the other near the occipital margin. Pronotal humeral hair flagellate; an erect pair of flagellate hairs on mesonotum. First gastral tergite with scattered erect hairs, a few of which are weakly flagellate; others are narrowly looped apically and in profile appear truncated (may be damaged). Posteriorly on the tergite there are also some fine soft hairs that are more reclinate and curved posteromedially. Propodeum with a tooth, subtended by a lamella that is not dentiform or angulate basally. In profile petiole with a ventral curtain of spongiform tissue and the lateral lobe of the node large and spongiform; height of anterior face of node about equal to, or slightly less than, length of dorsum (excluding posterior collar). In dorsal view petiole node broader than long; disc of postpetiole smooth, with 1-2 weak rugulae toward the dorsolateral margins. Basigastral costulae strong, longer than disc of postpetiole.

Type Material
Holotype worker, Costa Rica: Provo Puntarenas, Osa, Rancho Quemado, 8°42'N, 83°33'W, 2-300 m., 15.xii.1990, wet forest, ex sifted leaf litter, #2760-S (J. Longino).