Dinusa subangulata, Assing, 2014

Assing, V., 2014, On the Staphylinidae of Israel II, with a revision of some species of Dinusa SAULCY (Insecta: Coleoptera), Linzer biologische Beiträge 46 (2), pp. 1179-1210 : 1206-1207

Dinusa subangulata nov.sp. ( Figs 56-62 )

T y p e m a t e r i a l: Holotype: " Anatolia mer., 21.IV.73, Heinz leg. / Sakzagözü, 900- 1300 m / Dinusa taurica Assing , det. M. Schülke 2014 / Holotypus Dinusa subangulata sp. n., det. V. Assing 2014" (MNHUB). Paratypes: 3, 1, 1 sex?: same data as holotype (MNHUB, cAss, cSch).

E t y m o l o g y: The specific epithet (Latin, adjective) alludes to the moderately marked posterior angles of the pronotum.

D e s c r i p t i o n: Body length 4.4-5.0 mm; length of forebody 2.0- 2.2 mm. Habitus as in Fig. 56 . Coloration: head dark-brown to blackish-brown; pronotum pale-brown to brown; elytra yellowish-brown, with the scutellar region indistinctly darker; abdomen brown to dark-brown, with the apex (posterior half of segment VII; segments VIII-X) yellowish; legs dark-yellowish; antennae pale-reddish with the basal two antennomeres yellowish.

Head ( Fig. 57 ) transverse, with very fine and rather dense punctation, with short and depressed pubescence, and without microsculpture. Antenna ( Fig. 58 ) approximately 1.3 mm long; antennomeres VII-X distinctly transverse.

Pronotum ( Fig. 57 ) strongly transverse, 1.9-2.0 times as broad as long and 1.75-1.83 times as broad as head; posterior angles moderately marked; posterior margin weakly sinuate near posterior angles; disc with dense and fine punctation, with short yellowish pubescence, and without microsculpture.

Elytra ( Fig. 57 ) 0.85-0.90 times as long as pronotum, strongly sinuate near posterior angles; disc with fine and dense punctation, with short depressed yellowish pubescence, and without microsculpture. Hind wings present. Metatarsomere I approximately as long as, or slightly longer than, the combined length of II-IV.

Abdomen with tergites III-VI densely and finely punctate and with tergites VII-VIII more or less densely punctate; interstices without microsculpture; pubescence depressed and yellowish; posterior margin of tergite VIII with palisade fringe.

: sternite VIII posteriorly strongly convexly produced in the middle; median lobe of aedeagus ( Figs 59-61 ) 0.63-0.65 mm long; ventral process apically with deep median incision in ventral view.

: posterior margin of sternite VIII weakly, but noticeably concave in the middle; spermatheca as in Fig. 62.

C o m p a r a t i v e n o t e s: Dinusa subangulata is distinguished from all its congeners by the morphology of the aedeagus. Regarding the shape of the pronotum (posterior angles noticeable, posterior margin sinuate on either side), it is most similar to D. angulicollis , from which it differs by larger body size (length of forebody in D. angulicollis 1.5-1.6 mm), by the less convex (cross-section) and more transverse pronotum with less pronounced posterior angles, and by the morphology of the larger median lobe of the aedeagus (ventral process broader in ventral view, shorter in relation to basal portion in lateral view, and apically with more pronounced apical incision). The new species is distinguished from the geographically close D. jebusaea , with which it shares a similar body size, short antennae with distinctly transverse antennomeres, an aedeagus of similar size, and a similarly shaped spermatheca by the more transverse pronotum with more pronounced posterior angles, by the shape of the median lobe of the aedeagus (ventral process shorter in relation to the basal portion in lateral view, broader and apically of different shape in ventral view), and by the different shape of the distal portion of the spermathecal capsule.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality, today Sakçagöze, is situated in Gaziantep province, central southern Anatolia, at an altitude of 900-1300 m. The type specimens were collected in the same place and on the same day as a specimen of D. taurica .

Figures

Figs 56-62: Dinusa subangulata nov.sp.: (56) habitus; (57) forebody; (58) antenna; (59) median lobe of aedeagus in lateral view; (60-61) apical portion of median lobe of aedeagus in ventral view; (62) spermatheca. Scale bars: 56-57: 1.0 mm; 58: 0.5 mm; 59-61: 0.2 mm; 62: 0.1 mm.