Stenamma siculum

Distribution based on Regional Taxon Lists
Palaearctic Region: Italy.

Nomenclature

 *  siculum. Stenamma siculum Rigato, 2011: 12, figs. 5, 41, 47, 48, 54, 58, 63, 68 (q.m.) ITALY (Sicily).

Queen
Holotype: TL 4.8; HL 0.95; HW 0.78; CI 82; SL 0.77; SI 99; PCI 35; AL 1.40; PSI 1.64; ScW 0.67; MnL 1.05; PeL 0.51; PPL 0.30; PeH 0.24; PPH 0.24; PeW 0.20; PPW 0.26; PI1 59; PI2 65; MTL 0.73; TI 94.

TL 4.6–5.1; HL 0.94–1.02; HW 0.77–0.84; CI 82–84; SL 0.77–0.82; SI 97–100; PCI 29–33; AL 1.32–1.50; PSI 1.5–1.8; ScW 0.66–0.74; MnL 0.95–1.11; PeL 0.49–0.54; PPL 0.30–0.34; PeH 0.24–0.27; PPH 0.23–0.26; PeW 0.18–0.21; PPW 0.24–0.28; PI1 59–68; PI2 62–66; MTL 0.72–0.79; TI 90–96 (11 measured).

Mandibles longitudinally rugose with distinct piligerous pits, 8-10 toothed. Anterior clypeal border shallowly concave in the middle. Head distinctly longer than wide, with moderately convex sides, narrower at occipital angles than at mandibular insertion; its surface mostly areolate with longitudinal rugulation prevailing on the front, reticulate-punctate ground sculpture moderately developed. Scape moderately long, usually just reaching the posterior margin of the head when laid back. The latter weakly convex in full face view.

Mesosoma in profile with weakly convex mesoscutum; propodeal dorsum steep. Pronotum mostly transversely irregularly rugose. Mesonotum with an irregular median carina and mostly longitudinally irregularly rugose. Sides of mesosoma irregularly longitudinally rugose, except for the largely smooth anterior mesopleuron. Propodeal dorsum transversely rugose; its declivity faintly transversely rugulose and shining. Propodeal spines strong and sharp. Waist reticulate-punctate with scattered short irregular rugulae; nodes mostly smooth and shining. Petiole in profile with a bluntly triangular node, its sternite distinctly concave at node level and with no anterior subpetiolar process. Postpetiole in profile relatively elongate; its sternite weakly concave and with a slightly protruding anterior process. In dorsal view petiolar peduncle just behind the protruding spiracles about parallel-sided. Gaster almost completely smooth and shining, except at its basalmost portion, which is weakly reticulate-punctate with superimposed diverging short rugulae.

Appressed to subdecumbent pubescence moderately long and occurring above most surfaces, more abundant on head and appendages. Standing, subdecumbent to erect, hairs as usual: abundant on head (especially dorsomedially, laterally and ventrally), dorsum of mesosoma and gaster. Scape dorsally with several standing (subdecumbent to suberect) hairs raised above the level of the pubescence; extensor surface of mid and hind tibiae with few, sparse subdecumbent setae besides the ordinary decumbent pubescence. All of these appendage setae often are not clearly distinguishable from pubescence hairlets, but they are basally straighter and raised above pubescence level.

Colour mostly ferrugineous throughout, with a more testaceous gaster. Wings appearing faintly infuscated.