Lesteva aculeata Shavrin, 2010

Shavrin, Alexey, 2010, Three new species of the genus Lesteva Latreille, 1797 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini) from Uzbekistan, Tadzhikistan and Afghanistan, Baltic Journal of Coleopterology 10 (2), pp. 147-152 : 150-152

Lesteva aculeata Shavrin , sp.n.

( Figs. 5-7 )

Type material. Holotype: male, Sowjetunion [ Uzbekistan], Tien-Schan, Tschingan, 14.6.1988, leg. M. Mey ( MNHUB).

Paratypes: 2 females, same data as the holotype ( MNHUB) .

Description. Measurements: WH: 0.76-0.8; LH: 0.44-0.6; LA: 2.1; LE: 0.22-0.24; LT: 0.1; LP: 0.84- 0.92; WPmax: 0.94-0.96; WPmin: 0.64-0.76; LES: 1.44-1.64; WE: 1.5-1.8; WA: 1.38-1.56 (V tergite); LAE: 0.8. Body length: 4.3-4.8.

Body brown to brownish black; elytra paler, yellowish brown to brown with reddish enlarged areas in middle; legs, mouthparts, and ocelli yellow to yellowish brown. Body covered by yellow setae, pubescence on head irregular and sparse, on pronotum and elytra longer and denser.

Head distinctly smaller than pronotum, 1.3-1.7 times wider than long; temples short, weakly rounded to neck constriction. Eyes large, convex, relatively twice longer than temples. Anteocellar depressions relatively deep. Punctation regular, dense and fine, interstices 1-2 times as broad as diameter of punctures, without microsculpture, glossy. Ocelli relatively small, well visible at low magnification, distance between ocelli 1.2 times the distance between ocellus and posterior margin of eye. Antennae long, with enlarged antennomeres, reaching anterior third length of elytra, with long setae on all antennomeres; antennomere I twice as long as wide and 1.3 times as long as II, antennomeres IV-V and VIII-X with similar proportions. Length/width of antennomeres are: I: 0.22 × 0.1; II: 0.16 × 0.07; III: 0.2 × 0.07; IV–V: 0.16 × 0.08; VI: 0.19 × 0.08; VII: 0.17 × 0.08; VIII – X: 0.16 × 0.08; XI: 0.24 × 0.09.

Pronotum large, heart-shaped, weakly convex, 1- 1.1 times wider than long; sides of pronotum at minimal width parallel-sided; posterior angles rectangular; medial part on either side of the median line of disc with two oval impressions. Punctation regular, denser and coarser than those of head; interstices between punctures 1-1.5 times as broad as diameter of a puncture, glossy, microsculpture absent.

Scutellum large, triangular, with fine small punctures, without microsculpture.

Elytra large, approximately as long as wide; covering first three tergites. Punctation regular, deeper and larger than those of pronotum; interstices between punctures 1–1.5 times as broad as diameter of a puncture, glossy, without microsculpture. Wings fully developed.

Abdomen convex, narrower than elytra; without punctation on all tergites, with distinct isodiametric microsculpture visible at low magnification.

Male. First four tarsomeres of protarsi weakly dilated. Aedeagus ( Figs. 5 ) oblong, narrowing to medial part, with nipple-shaped apex. Apex of aedeagus laterally as in Fig. 6 . Paramerae long, curved apically, and almost exceeding apex of aedeagus. Sternite VIII ( Fig. 7 ) with deep semicircular emargination, with large tooth in central part of emargination.

Female. Tarsomeres of protarsi not dilated. Sternite VIII without apical emargination, margin straight.

Comparative notes. Based on the type of aedeagus, the new species is closely related to L. binotata Reitter, 1901 from which it differs by less prominent and wider body, by the presence of longitudinal impressions on pronotum, by the presence of medial tooth in sternite VIII of male and by the shape of aedeagus (medial and apical parts of aedeagus of new species significantly narrower, paramerae shorter).

Etymology. The name derives from Latin adjective (aculeātus, -a, -um [aculeus]) meaning “thorny”, and alludes to the presence of tooth in emargination of male sternite VIII.

Figures

FIGURES 5-7. Lesteva aculeata Shavrin, sp.n.: 5 – aedeagus, ventral view; 6 – apex of aedeagus, dorsal view; 7 – apex of sternite VIII, male. Scale bar: 0.2 mm (Figs. 5-6), 0.3 mm (Fig. 7).