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

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

( Figs. 7, 7-1 View FIGURE 7 )

Type material. Holotype ♂, CHINA: Sichuan Province: Wolong National Nature Reserve, Wuyipeng , 2600 m, 14–29. VI. 2004, coll. Xiaodong Yu. Paratypes: CHINA: Sichuan Province: 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2545 m, 14–29. VI. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2580 m, 14–29. VI. 2004, coll. Xiaodong Yu ; 1 ♂, 3 ♀♀, Wolong National Nature Reserve, Wuyipeng , 2600 m, 14–29. VI. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2400 m, 16. VI –1. VII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2580 m, 29. VI –14. VII. 2004, coll. Xiaodong Yu ; 1 ♀, Wolong National Nature Reserve, Wuyipeng , 2580 m, 29. VII –14. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Erdaoping , 2840 m, 30. VII –15. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2550 m, 31. VII –16. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2525 m, 14–29. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2710 m, 14–29. VIII. 2004, coll. Xiaodong Yu ; 2 ♀♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2515 m, 16–31. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2525 m, 16–31.VIII. 2004, coll. Xiaodong Yu ; 1 ♂, 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2550 m, 16–31. VIII. 2004, coll. Xiaodong Yu ; 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2570 m, 16–31. VIII. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng , 2540 m, 29. VIII–14. IX. 2004, coll. Xiaodong Yu ; 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2550 m, 31. VIII–16. IX. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2455 m, 16. IX–1. X. 2004, coll. Xiaodong Yu ; 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2490 m, 16. IX–1. X. 2004, coll. Xiaodong Yu ; 1 ♀, Wolong National Nature Reserve, Wuyipeng, Yuancaodi , 2570 m, 16. IX–1. X. 2004, coll. Xiaodong Yu ; 1 ♂, Wolong National Nature Reserve, Balangshan , 3170 m, 20–23. IX. 2004, coll. Xiaodong Yu.

Description. Head black; pronotum, scutellum and elytra dark brown; abdomen dark 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 = 9.8 mm, BW = 1.9 mm, MHWL = 6.3 mm, FHWL = 2.6 mm, HL/PL/EL/MHWL/FHWL = 1.00: 1.32: 1.48: 4.91: 2.00, HW/PW/EW/AW = 1.00: 1.21: 1.32: 1.25

Head ( Fig. 7A View FIGURE 7 ) round, wider than long, HW/HL = 1.13; eye large and convex, in dorsal view tempora shorter than length of eye, sharply narrowed posteriad, HEL/HTL = 3.31; 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; two basal setiferous punctures situated very close to nuchal constriction; head with fine and dense microsculpture of transverse waves and irregular meshes. Antenna slender, with segment I longer than segment II or III, segment III distinctly longer than segment II, segments IV–XI distinctly longer than wide.

Pronotum ( Fig. 7B View FIGURE 7 ) about as wide as long, PW/PL = 1.04, slightly 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.

Scutellum ( Fig. 7C View FIGURE 7 ) with very fine and dense microsculpture of transverse waves, impunctate.

Elytra ( Fig. 7C View FIGURE 7 ) moderately long, about as wide as long, EW/EL = 1.01, ESL/EL = 0.59, slightly broadened posteriad, surface of each elytron covered with dense and coarse setiferous punctures, transverse interspaces between punctures nearly equal to 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 inconspicuous 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 about as wide as apex of tibia; tergite VIII with basal ridge complete and nearly straight, with one long seta on each side; sternite VIII ( Fig. 7-1A View FIGURE 7 ) with basal ridge complete, slightly arched backward in middle, with four long setae on each side, apical margin distinctly and narrowly membranous, nearly transparent, with very inconspicuous medioapical emargination, a narrow subtriangular area in front of the emargination impunctate, apical margin with long setae curved medially; sternite IX ( Fig. 7-1B View FIGURE 7 ) with basal portion long and wide, on surface of apical portion with some differentiated setae arranged into two characteristic longitudinal groups, apex nearly truncate; tergite X ( Fig. 7-1C View FIGURE 7 ) with basal side broadly and deeply concave, apical margin rounded; aedeagus in lateral view ( Fig. 7-1F View FIGURE 7 ) with apex of paramere distinctly not reaching that of median lobe, median lobe with distinct medial carina a little below apex; aedeagus in parameral view ( Fig. 7-1G View FIGURE 7 ) with paramere wide, slightly widened at middle, apical portion almost straightly narrowed forming subacute triangular apex, median lobe wide at base, gradually narrowed to about basal 3/4, apical 1/4 slightly dilated laterally, apex rounded ( Figs. 7E, 7-1D View FIGURE 7 ). apical portion of paramere with four moderately long apical setae, and two similar subapical setae on each lateral side below apex, underside with 4 sensory peg setae arranged in two transverse groups far below apex ( Figs. 7D, 7-1E View FIGURE 7 ).

Female first four segments of fore tarsus similar to those of male, but much less dilated, segment II distinctly narrower than apex of tibia; tergite VIII with basal ridge complete, nearly straight, with one long seta on each side; sternite VIII with basal ridge complete, slightly arched backward in middle, with three long setae on each side; tergite X ( Fig. 7-1H View FIGURE 7 ) with basal side broadly and deeply concave, with a distinct narrow subtriangular area in middle more strongly sclerotized and pigmented, apical margin protruded and pointed, with one or two long setae at apex, and some shorter ones a little anteriorly.

Hind wings. Male and female with hind wings dimorphic. Male with hind wings fully developed, much longer than those of female, female with hind wings markedly reduced, not functional, BL/MHWL/FHWL = 1.00: 0.64: 0.26; MHWL/FHWL = 2.45.

Distribution. China (Sichuan).

Diagnosis. This new species belongs to the lineage comprised of Q. faang Smetana , Q. haw Smetana , Q. euryalus Smetana and Q. lih Smetana within euryalus group sharing the character of setation of male sternite IX characteristically arranged into two longitudinal groups, but it is distinctly different from other four by the paramere of aedeagus with apex distinctly more pointed, without medioapical emargination.

Etymology. The specific name is from the Latin adjective perlucidus (transparent), referring to the transparent membranous apical margin of male sternite VIII.