Leptusa (Aphaireleptusa) habana, Assing, 2021

Assing, Volker, 2021, New species and additional records of Leptusa from the Palaearctic region, with a focus on the faunas of China and the Caucasus region (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 71 (1), pp. 103-126 : 116-117

Leptusa (Aphaireleptusa) habana spec. nov.

urn:lsid:zoobank.org:act:217C5415-9901-4E13-8DD8-3F8AEA4CC8C1

( Figs 9, 15 , 39–44)

Type material: Holotype : “ CHINA, Yunnan, Haba Shan, N27°21'01", E100°05'44", 4072 m, 28.vi.2012, sift35, V. Grebennikov / Holotypus  Leptusa habana sp. n. det. V. Assing 2020” ( CAS) . Paratypes: 16 exs.: same data as holotype ( CNC, cAss) ; 1 ex.: “ CHINA, Yunnan, Haba Shan, N27°20'54", E100°04'36", 4222 m, 28.vi.2012, sift35, V. Grebennikov” ( CNC) ; 3 exs.: “ CHINA, Yunnan, Haba Shan, N27°20'58", E100°05'58", 19.vi.2012, 4114 m, sift24, V. Grebennikov” ( CNC) ; 2 exs.: “ CHINA, Yunnan, Haba Shan, N27°21'20", E100°06'36", 19.vi.2012, 3826 m, sift25, V. Grebennikov” ( CNC) ; 2 exs.: “ CHINA, Yunnan, Haba Shan, N27°21'01", E100°05'44", 21.vi.2012, 4072 m, sift26, V. Grebennikov” ( CNC, cAss) ; 2 exs.: “ CHINA, Yunnan, Haba Shan, N27°20'47", E100°05'33", 27.vi.2012, 4154 m, sift32, V. Grebennikov” ( CNC) .

Etymology: The specific epithet is an adjective derived from the name of the mountain where the species was discovered.

Description: Body length 2.5–3.3 mm; length of forebody 1.2–1.4 mm. Habitus as in Fig. 9 . Colouration: body blackish-brown to black; legs reddish to dark-reddish; antennae brown with the basal three antennomeres reddish.

Head ( Fig. 15 ) transverse; punctation moderately coarse, dense, not umbilicate; interstices narrower than diameter of punctures, with microsculpture. Eyes approximately as long as postocular region in lateral view. Antenna moderately slender, gradually and moderately incrassate apically, preapical antennomeres approximately 1.5 times as broad as long.

Pronotum ( Fig. 15 ) 1.2–1.3 times as broad as long and approximately 1.3 times as broad as head; maximal width in anterior half; posterior angles weakly marked; punctation dense and fine; interstices with distinct microreticulation.

Elytra ( Fig. 15 ) 0.65–0.70 times as long as pronotum; punctation similar to that of head; interstices with microsculpture. Hind wings completely reduced.

Abdomen broader than elytra; tergites III–VI with anterior impressions, that of tergite VI slightly shallower than those of tergites III–V; punctation fine and rather dense; interstices with shallow microreticulation; posterior margin of tergite VII with narrow rudiment of a palisade fringe; tergite VII without sexual dimorphism.

: tergite VIII (Fig. 41) with concave to truncate posterior margin; sternite VII posteriorly concave, with long marginal setae; posterior margin of sternite VIII convexly produced in the middle (Fig. 42); median lobe of aedeagus approximately 0.45 mm long, shaped as in Figs 39–40; apical lobe of paramere of similar shape as in L. chinensis .

: tergite VIII with truncate to weakly convex posterior margin; posterior margin of sternite VIII weakly produced in the middle (Fig. 43); spermatheca (Fig. 44) not distinctive.

Comparative notes: Among the Chinese representatives of the subgenus Aphaireleptusa , L. habana is most similar to L. xuemontis and L. turgida . It differs from them as follows:

- from L. xuemontis by larger eyes, finer punctation of the forebody, and a slightly smaller aedeagus with a much less pronounced median projection of the ventral process (lateral view);

- from L. turgida by longer, darker, and more massive antennae and by a larger aedeagus of slightly different shape ( L. turgida : median lobe of aedeagus approximately 0.4 mm long).

For illustrations of L. xuemontis and L. turgida see PACE

(2001) and ASSING (2006), respectively.

Distribution and natural history: The specimens were sifted in several close localities in Haba Shan, North Yunnan, at altitudes of 3820–4220 m.

Figures

Figs 9–18: Male habitus (9–11) and forebody (12–18) of Leptusa spp. 9, 15 – L. habana; 10 – L. monscangi; 11 – L. pathibarana; 12 – L. excisa; 13 – L. grandipennis; 14 – L. gonggana; 16 – L. auriculata; 17 – L. jizuica; 18 – L. desculpens. Scale bars:9–16: 1.0 mm; 17–18: 0.5 mm.