Quedius (Microsaurus) capillus, Cai & Zhao & Zhou, 2015

Quedius (Microsaurus) capillus View in CoL sp. nov.

( Figs. 6, 6-1 View FIGURE 6 )

Type material. Holotype ♂, CHINA: Sichuan Province: Wolong National Nature Reserve, Wuyipeng, Erdaoping , 3055 m, 30. VII–15. VIII. 2004, coll. Xiaodong Yu. Paratypes: CHINA: Sichuan Province: 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2600 m, 14–29. VI. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Erdaoping , 3055 m, 30. VII –15. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Erdaoping , 2965 m, 30. VII –15. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Erdaoping , 2945 m, 30. VIII–15. IX. 2004, coll. Xiaodong Yu.

Description. Head black; pronotum, scutellum and elytra dark brown; abdomen blackish brown, each tergite with posterior margin slightly paler; antennae dark brown, labrum dark brown, mandibles dark reddish brown, maxillary and labial palpi brown; legs dark brown, tibiae blackish brown.

BL = 7.7 mm, BW = 1.6 mm, MHWL = 5.2 mm, HL/PL/EL/MHWL = 1.00: 1.29: 1.54: 4.88, HW/PW/EW/ AW = 1.00: 1.23: 1.36: 1.22

Head ( Fig. 6A View FIGURE 6 ) round, wider than long, HW/HL = 1.14; eye large and convex, in dorsal view tempora shorter than length of eye, sharply narrowed posteriad, HEL/HTL = 3.05; posterior frontal setiferous puncture situated slightly before level of posteriomedial margin of eye, separated by distance about equal to diameter of puncture; one smaller setiferous puncture between it and temporal setiferous puncture at posterior margin of eye; temporal setiferous puncture separated from posterior margin of eye by distance a little longer than diameter of puncture, with several small setiferous punctures arranged in an oblique curve behind it; 2–3 basal setiferous punctures situated close to nuchal constriction; head with fine and dense microsculpture of transverse waves and irregular meshes. Antenna relatively slender, with segment I longer than segment II or III, segment III slightly longer than segment II, segments IV–VII, XI slightly longer than wide, segments VIII–X slightly wider than long.

Pronotum ( Fig. 6B View FIGURE 6 ) slightly wider than long, PW/PL = 1.08, narrowed anteriad, posterolateral and posterior margins continuously and broadly rounded, lateral margins not explanate; three setiferous punctures in each dorsal and sublateral row, last sublateral row puncture situated behind level of large lateral setiferous puncture; surface of pronotum with very fine and dense microsculpture of transverse waves and irregular meshes.

Scutellum ( Fig. 6C View FIGURE 6 ) with very fine and dense microsculpture of transverse waves, impunctate.

Elytra ( Fig. 6C View FIGURE 6 ) moderately long, about as wide as long, EW/EL = 1.01, ESL/EL = 0.56, slightly broadened posteriad, surface of each elytron covered with moderately dense and coarse setiferous punctures, transverse interspaces between punctures a little wider than diameter of punctures, surface between punctures without microsculpture.

Abdominal tergite II impunctate; setiferous punctures of other tergites slightly finer and denser than those of elytra, becoming sparser toward posterior margin of each tergite, and generally becoming so toward apex of abdomen; tergite VII with whitish apical seam of palisade setae.

Male first four segments of fore tarsus moderately dilated, sub-bilobed, each heavily covered with modified pale setae ventrally, segment II slightly wider than apex of tibia; tergite VIII with basal ridge complete and nearly straight, with one long seta on each side; sternite VIII ( Fig. 6-1A View FIGURE 6 ) with basal ridge complete, nearly straight, with four long setae on each side, apical margin with a wide and very shallow medioapical emargination, a narrow and very small subacute triangular area in front of the emargination impunctate, posterior margin with very long setae curved medially; sternite IX ( Fig. 6-1B View FIGURE 6 ) with basal portion wide and somewhat straight, with apex bilobed, deeply and widely emarginated medioapically; tergite X ( Fig. 6-1C View FIGURE 6 ) with basal side broadly and shallowly concave, apical margin rounded; aedeagus in lateral view ( Fig. 6-1D View FIGURE 6 ) with apex of paramere almost reaching that of median lobe, median lobe with a small hook-shaped process at apex; aedeagus in parameral view ( Fig. 6-1E View FIGURE 6 ) with paramere wide, almost entirely covering middle and apical portion of median lobe, with basal 3/4 nearly parallel-sided laterally, slightly widened at apical 1/4, then gradually narrowed to apex, apex with moderately deep and wide medioapical emargination, hook-shaped process of median lobe fitting into this emargination, median lobe wide at base, gradually narrowed to middle, apical half narrow, nearly parallel-sided laterally, tapered into subacute apex ( Figs. 6E, 6-1G View FIGURE 6 ). apical portion of paramere with two moderately long apical setae at each side of apical emargination, and two similar subapical setae on each lateral side below apex, underside with 5–6 sensory peg setae arranged in curved transverse group near apex at each side of apical emargination ( Figs. 6D, 6-1F View FIGURE 6 ).

Female unknown.

Hind wings. Male with hind wings fully developed, MHWL/BL = 0.67. Female not examined.

Distribution. China (Sichuan).

Diagnosis. This new species is most similar to Q. hanno Smetana in male genitalia, but it can be distinguished from the latter by having male sternite VIII with four long setae on each side, with long setae along apical margin discontinuous in middle, forming small impunctate gap, male sternite IX bilobed, deeply and widely emarginated medioapically, paramere of aedeagus with basal third not constricted, nearly parallel-sided; whereas the latter has male sternite VIII with three long setae on each side, with entire apical margin bearing dense long setae, not forming impunctate gap in middle, male sternite IX with apex not bilobed, only broadly emarginated medioapically, paramere of aedeagus with basal third distinctly constricted.

Etymology. The specific name is from the Latin noun capillus (the hair) in apposition, referring to the very long setae along apical margin of male sternite VIII.