Lesteva, Latreille, 1797

Cheng, Zhi-Fei, Li, Li-Zhen & Peng, Zhong, 2019, New species and new records of Lesteva Latreille, 1797 (Coleoptera Staphylinidae: Omaliinae) from China, Zootaxa 4560 (1), pp. 1-39 : 25-29

Lesteva (incertae sedis) rufimarginata Rougemont, 2000

( Figs 17B , 18 G–H, 20D–F, 33)

Lesteva (incertae sedis) rufimarginata Rougemont, 2000: 168 .

Type locality. Mt. Qinling , Shaanxi Province, China .

Additional material examined (6 exs): 3 ♂♂: ‘ China: Hebei Prov., Zhangjiakou City (张家口市), Yuxian (蔚 县), Jinhekou Forest Park (金河口森林公园), 39°57′36″N, 114°55′39″E, alt. 1300 m, 23.viii.2005 leg.’ (SNUC); 1 ♂, 2 ♀♀: ‘ China: Shaanxi Prov., Baoji City (宝鸡市), Mei County (眉县), Taibaishan N. R. (太白山自然保护区), 39°0′4.09″N, 107°46′58.94″E, alt. 2750–3300 m, 14.viii.2004, Tang & Hu. ’ ( SNUC) .

Redescription. Measurements (in mm) and ratios: BL 3.73–3.90; FL 2.76–2.84; HL 0.53–0.56; HW 0.65–0.68; PL 0.71–0.74; PW 0.90–0.96; EL 1.49–1.61; EW 1.33–1.43, HL/HW 0.77–0.86; PL/PW 0.74–0.80; EL/EW 1.09–1.16; HW/PW 0.70–0.73; PL/EL 0.44–0.48; AnL 1.35–1.38; AeL 0.63–0.69.

Habitus as in Fig. 12B . Reddish brown or darker; head, median dorsal portion of pronotum and abdomen blackish brown; antennomeres I–II and base of antennomere III rufo-testaceous, antennomeres IV–XI infuscate; elytra blackish brown, with obscure oblique fusiform reddish brown maculae, extending from shoulder toward suture in middle; tarsi yellowish. Pubescence pale, dense and recumbent on whole body.

Head subtriangular, coarsely and sparsely punctate, widest across eyes; eyes moderately prominent, 2.60 times longer than temples; ocelli distinct, distance between ocelli 2.30 times as long as distance between ocellus and inner margin of the compound eye. Antennae short, relative lengths of the antennomeres I–XI: 1.54: 1.08: 1.08: 1: 1: 1: 1: 1: 1.08: 1.08: 1.54.

Pronotum subcordate and somewhat convex in dorsal view, apparently transverse widest at anterior middle, with discal impression; lateral margins arcuate, with very deep foveae at middle, then narrowing anteriad and posteriad; punctation and pubescence similar to that of head. Scutellum subtriangular, finely and densely punctate.

Elytra subtrapezoidal, gradually dilated posteriorly, posterior angles broadly rounded, with crescent-shaped deep impression; punctation and pubescence distinctly finer and sparser than those on pronotum.

Abdomen broad, widest at segment IV, distinctly narrowed posteriorly; surface of each tergite somewhat closely covered with very fine punctation, with distinct microsculpture; middle of the tergites IV and V with pair of tomentose patches.

Male. Apical margin of tergite VIII ( Fig. 13G ) with weak concavity; sternite VIII ( Fig. 13H ) transverse, apical margin strongly concave; median lobe of aedeagus ( Figs 15 D–F) wide apically, slightly shorter than parameres; parameres somewhat asymmetrical.

Female. Sternite VIII without concave apical margin, otherwise similar to males.

Comment. The original description is based on a female specimens collected in Mt. Qinling, Shaanxi ( Rougemont 2000). The above records from Hebei represent new provincial records ( Fig. 33 ). For illustrations of L. rufimarginata see Figs 17B , 18 G–H, 20D–F and Rougemont (2000: fig. 11).

Figures

FIGURE 12. Habitus (males) of Lesteva: A—L. fikaceki; B—L. huabeiensis. Scale bar: 1.0 mm.

FIGURE 13. Abdominal tergite VIII and sternite (males, dorsal view) of Lesteva: L. elongata sp. nov. (A—abdominal tergite VIII, B—abdominal sternite VIII); L. erythra (C—abdominal tergite VIII, D—abdominal sternite VIII); L. fikaceki (E— abdominal tergite VIII, F—abdominal sternite VIII); L. huabeiensis (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 15. Aedeagus of Lesteva (A–C. L. fikaceki Male. D–F. L. huabeiensis Male): A–C. Aedeagus, in dorsal (A), ventral (B) and lateral (C) view; D–F. Aedeagus, in dorsal (A), ventral (B) and lateral (C) view. Scale bar: 0.2 mm.

FIGURE 17. Habitus (males) of Lesteva: A—L. pulcherrima; B—L. rufimarginata. Scale bar: 1.0 mm.

FIGURE 18. Abdominal tergite VIII and sternite VIII (males, dorsal view) of Lesteva: L. obesa sp. nov. (A—abdominal tergite VIII, B—abdominal sternite VIII); L. ochra (C—abdominal tergite VIII, D—abdominal sternite VIII); L. pulcherrima (E— abdominal tergite VIII, F—abdominal sternite VIII); L. rufimarginata (G—abdominal tergite VIII, H—abdominal sternite VIII). Scale bar: 0.1 mm.

FIGURE 33. Distribution of four species of Lesteva in China: L. cordicollis, L. huabeiensis, L. rufimarginata, L. septemmaculata.