Lesteva brevimacula

Ma, Wen-Li & Li, Li-Zhen, 2012, A new species of Lesteva Latreille (Coleoptera, Staphylinidae, Omaliinae) from Zhejiang, East China, Zootaxa 3530, pp. 74-76 : 74-75

Lesteva (s. str.) brevimacula Ma and Li , new species

( Figs. 1–3 )

Type material. Holotype: CHINA: Zhejiang Prov.: 3, Hangzhou City, Mt.Wuchaoshan, 30°10’N, 120°00’E, 10.iv.2011, alt. 200 m, PENG Zhong & ZHU Jian-Qing leg. Paratypes: CHINA: Zhejiang Prov.: 3 3, 4 ƤƤ, same label data as holotype; 2 3, 2 ƤƤ, Lin'an City, East Tianmushan, 30°21’N, 119°25’E, 13.iv.2011, alt. 1,050–1,100 m, PENG Zhong & ZHU Jian-Qing leg.; 1 Ƥ, Lin'an City, East Tianmushan, 30°21’N, 119°25’E, 31.v.2010, alt. 830–900 m, WANG, XU & ZHU leg.; 13, Anji County, Longwangshan, 30°24’N, 119°25’E, 24.iv.2004, alt. 300–500 m, CHEN Jing leg.

Description. Measurements and ratios: BL 3.5–4.6 mm. Holotype: HL 0.65 mm, HW 0.68 mm, PL 0.73 mm, PW 0.78 mm, EL 1.60 mm, EW 1.40 mm, HL/HW 0.96, HW/PW 0.87, PL/PW 0.94.

Habitus as in Fig. 1 . Length 4.6 mm. Black, mouth-parts and antennae rufo-testaceous; legs dark, tarsi yellowishbrown. Each elytron with one small darkish red spot near middle. Pubescence pale, evident and recumbent on whole body.

Head sub-triangular, coarsely and sparsely punctate, widest across eyes and slightly broader across compound eyes than long; vertex moderately depressed; eyes prominent; ocelli distinct, distance between them slightly smaller than that from lateral margin of each ocellus to mesal margin of eye; postocular margins less than half length of longitudinal diameter of eye; antennae overlapping base of pronotum by two terminal segments when pulled posteriad; antennomeres I moderately robust, II much shorter and narrower than I, III–X each elongate and thickened in apical half, XI as long as I, nearly fusiform; relative length of each antennomere from base to apex as 15: 9: 10: 9: 10: 10: 10: 10: 9: 9: 15.

Pronotum subcordate, moderately convex, widest near anterior third, slightly wider than head; lateral margins rounded at anterior two-thirds and nearly straight at posterior third; more coarsely and densely punctate than on head; with paired shallow transverse discal impressions, one median and two admesal longitudinal antebasal impressions. Scutellum subtriangular, surface with fine punctation and pubescence.

Elytra subtrapezoidal, gradually dilated posteriorly, posterior angles broadly rounded; punctation and pubescence slightly finer and sparser than those on pronotum.

Abdomen broad, widest at segment IV (first visible abdominal segment), then distinctly narrowed posteriorly. Tergites with dense, fine punctation and decumbent pubescence; tergites IV–V each with one pair of tomentose admesal patches.

Male. Sternite VIII transverse, posterior margin broadly emarginate. Aedeagus ( Figs. 2–3 ) length 0.74 mm, parameres longer than median lobe.

Female. Protarsomeres I–IV not dilated. Otherwise similar to male.

Distribution. East China: Zhejiang Province.

Bionomics. The type series were collected by sifting leaf litter and wet moss at the streamside.

Etymology. The specific epithet ‘ brevimacula ’ means ‘small spot’, referring to the small spots of elytra.

Remarks. The new species is most similar to Lesteva cooteri Rougemont in sharing a pair of small elytral spot, but can be quickly separated by the larger size and aedeagus with parameres being longer than the median lobe.

Figures

FIGURES 1 – 3. Major diagnostic features of L. brevimacula. 1. habitus. 2. aedeagus, in ventral view. 3. aedeagus, in lateral view. Scales: 1: 1.0 mm; 2, 3: 0.2 mm.