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

Cai, Yan-Peng, Zhao, Zong-Yi & Zhou, Hong-Zhang, 2015, Taxonomy on Quedius euryalus group (Coleoptera: Staphylinidae: Staphylinini: Quediina) from China with description of eight new species, Zootaxa 3966 (1), pp. 1-70 : 32-33

Quedius (Microsaurus) subwrasei sp. nov.

( Figs. 9, 9-1 )

Type material. Holotype ♂, CHINA: Sichuan Province: Baoxing County, Guobayangou , 2318 m, 4–7. VIII. 2003, coll. Xiaodong Yu. Paratypes: CHINA: Sichuan Province: 2 ♂♂, 4 ♀♀, Baoxing County, Guobayangou , 2295 m, 4–7. VIII. 2003, coll. Xiaodong Yu ; 2 ♀♀, Baoxing County, Guobayangou , 2306 m, 4–7. VIII. 2003, coll. Xiaodong Yu ; 2 ♂♂, Baoxing County, Guobayangou , 2318 m, 4–7. VIII. 2003, coll. Xiaodong Yu ; 3 ♂♂, 5 ♀♀, Baoxing County, Guobayangou , 2507 m, 4–7. VIII. 2003, coll. Xiaodong Yu ; 1 ♂, Baoxing County, Longdong, Ganyanggou , 1980 m, 9–12. VIII. 2003, coll. Xiaodong Yu ; 1 ♂, Baoxing County, Longdong, Ganyanggou , 1995 m, 9–12. VIII. 2003, coll. Xiaodong Yu ; 1 ♀, Baoxing County, Longdong, Ganyanggou , 2050 m, 9–12. VIII. 2003, coll. Xiaodong Yu ; 4 ♂♂, 10 ♀♀, Baoxing County, Pujigou , 2200 m, 11–14. VIII. 2003, coll. Xiaodong Yu.

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

BL = 12.6 mm, BW = 2.5 mm, MHWL = 7.1 mm, FHWL = 7.3 mm, HL/PL/EL/MHWL/FHWL = 1.00: 1.41: 1.62: 4.71: 4.83, HW/PW/EW/AW = 1.00: 1.41: 1.57: 1.48

Head ( Fig. 9A ) round, slightly wider than long, HW/HL = 1.07; eye moderately large and slightly convex, in dorsal view tempora shorter than length of eye, gradually narrowed posteriad, HEL/HTL = 1.61; posterior frontal setiferous puncture situated behind level of posteriomedial margin of eye, separated by distance about twice as long as diameter of puncture; one smaller setiferous puncture between it and temporal setiferous puncture at posterior margin of eye; temporal setiferous puncture situated in midway between posterior margin of eye and nuchal constriction of head, with several small setiferous punctures arranged in an oblique curve behind it; 2–3 basal setiferous punctures between posterior margin of eye and nuchal constriction; head with very fine and dense microsculpture of tiny irregular meshes. Antenna long, with segment I longer than segment II or III, segment III distinctly longer than segment II, segments IV–XI longer than wide.

Pronotum ( Fig. 9B ) slightly wider than long, PW/PL = 1.06, 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 microsculpture similar to that of head.

Scutellum ( Fig. 9C ) with very fine and dense microsculpture of transverse waves, impunctate.

Elytra ( Fig. 9C ) moderately long, about as wide as long, EW/EL = 1.03, ESL/EL = 0.57, slightly broadened posteriad, surface of each elytron covered with dense and coarse setiferous punctures, transverse interspaces between punctures nearly equal to diameter of puncture, surface between punctures without microsculpture.

Abdominal tergite II impunctate; setiferous punctures of other tergites finer and denser than those of elytra, becoming inconspicuously 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 strongly 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 straight, with two long setae on each side; sternite VIII ( Fig. 9-1A ) with basal ridge complete, slightly arched backward in middle, with six long setae on each side, apical margin with a shallow and narrow medioapical emargination, a small triangular area in front of the emargination impunctate; sternite IX ( Fig. 9-1B ) with basal portion large, apical portion strongly asymmetrical, with apex almost truncate; tergite X ( Fig. 9-1C ) with basal side broadly and shallowly concave, apical margin slightly protruded and subacute; aedeagus in lateral view ( Fig. 9-1F ) with apex of paramere distinctly not reaching that of median lobe, median lobe with distinct medial carina at apex, pointing toward paramere side; aedeagus in parameral view ( Fig. 9-1G ) with paramere narrower than median lobe, slightly asymmetrical, apex with small medioapical emargination, medial carina of median lobe fitting into this emargination, median lobe wide, gradually narrowed to apical portion forming subacute apex ( Figs. 9E, 9-1D ). apical portion of paramere with two relatively long apical setae at each side of apical emargination, and two similar subapical setae on each lateral side below apex, underside with 2–4 sensory peg setae arranged in cluster near apex at each side of apical emargination ( Figs. 9D, 9-1E ).

Female first four segments of fore tarsus similar to those of male, but less dilated, segment II slightly narrower than apex of tibia; tergite VIII with basal ridge complete, nearly straight, with two long seta on each side; sternite VIII with basal ridge complete, slightly arched backward in middle, with four long setae on each side; tergite X ( Fig. 9-1H ) with basal side broadly and relatively shallowly concave, with a distinct narrow subtriangular area in middle more strongly sclerotized and pigmented, apical margin distinctly protruded and acute.

Hind wings. Male and female with hind wings monomorphic. Both male and female with hind wings fully developed. BL/MHWL/FHWL = 1.00: 0.56: 0.57; MHWL/FHWL = 0.97.

Distribution. China (Sichuan).

Diagnosis. This new species belongs to the lineage comprised of Q. arcus sp. nov., Q. bernhauerianus Korge , Q. subwrasei sp. nov. and Q. wrasei Smetana within euryalus group. It is most similar to Q. wrasei Smetana , but can be distinguished from the latter by having body color mostly blackish brown, medioapical emargination on apical margin of male sternite VIII deeper, apex of male tergite X less protruded, aedeagus smaller, with paramere narrower, median lobe symmetrical and more pointed; whereas Q. wrasei Smetana has body color entirely black, medioapical emargination on apical margin of male sternite VIII shallower, apex of male tergite X more protruded, aedeagus larger, with paramere wider, median lobe asymmetrical and less pointed.

Etymology. The specific name is derived from the Latin prefix sub - and the species name Q. wrasei Smetana , referring to the similarity between these two species.

Figures

FIGURE 9. Quedius (Microsaurus) subwrasei sp. nov.: A. head (1.0 mm); B. pronotum (1.0 mm); C. elytra (1.0 mm); D. underside of paramere (0.2 mm); E. apical portion of median lobe, parameral view (0.2 mm). (Scale lengths in parentheses)