Strumigenys abditivata

Identification
Bolton (2000) - A very distinctive species within the group, immediately diagnosed by its extremely long mandibular basal lamella and sculptured mandibles. The closest related species is Strumigenys dentinasis but here the clypeus has a dorsal tooth on the midline close to its anterior margin.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil.

Nomenclature

 * abditus. Gymnomyrmex abditus Kempf, 1960f: 448, figs. 23, 25, 29, 31 (w.) BRAZIL. [Junior secondary homonym of abdita Wesson & Wesson.] Replacement name: Pyramica abditivata, below.
 *  abditivata. Pyramica abditivata Bolton, 2000: 231. Replacement name for abditus Kempf, 1960f: 448. [Junior secondary homonym of abdita Wesson & Wesson, 1939: 106, above.] Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 110.

Worker
TL 2.7-2.8, HL 0.74-0.80, HW 0.64-0.70, CI 86-88, ML 0.16-0.18, MI 21-24, SL 0.29-0.33, SI 45-50, PW 0.30-0.32, AL 0.76-0.86 (6 measured).

Fully closed mandibles in full-face view with exposed basal lamella distinctly longer than the tooth row. Dorsal surfaces of mandibles finely and very densely sculptured, dull, contrasting strongly with the glossy vertex. Frontal lobes and frontal carinae broadly expanded, their outer margins not sinuate, the preocular carina not visible in full-face view. Three fenestrae in each upper scrobe margin; anteriormost (smallest) over the antennal insertion, the two behind this larger. Dorsolateral margins of head without freely projecting hairs of any form, cephalic dorsum without standing hairs. Alitrunk unsculptured, without standing hairs dorsally; pronotal humeral hair absent. Pronotum weakly marginate dorsolaterally. Discs of petiole and postpetiole smooth and shining, the lateral lobe of the petiole small and laminate rather than densely spongiform. Dorsal (outer) surfaces of middle and hind tibiae without freely projecting hairs. Base of first gastral tergite with sparse simple standing hairs.

Type Material
Holotype worker and paratype workers, BRAZIL: Parana, Rio Azul PR, 1000 m., x.1959, no. 3151, sifted leaf mould (F. Plaumann) [examined].