Contribution to the knowledge of the genus Quedius S, 1829 of Siberia and Russian Far East (Coleoptera: Staphylinidae: Staphylinini: Quediina) Author Smetana, Tephens Author Shavrin, A. text Linzer biologische Beiträge 2018 2018-07-27 50 1 825 836 journal article 21035 10.5281/zenodo.4004389 03168ca4-19e8-4ef5-a000-0e23e0c1a0d2 0253-116X 4004389 Quedius ( Microsaurus ) amurensis SMETANA nov.sp. ( Figs 7-11 , 23 ) T y p e l o c a l i t y. RUSSIA : Amurskaya obl., Skovorodinskiy r-n., lev. ber. r. Urka, ok 8 km S p. Erofei Pavlovich, N 54˚ 02’24.84’’ E 121˚ 58’ 30.69’’, h= 552 m . T y p e m a t e r i a l. Holotype ( ♂ ), RUSSIA : "Amurskaya obl., Skovorodinskiy r-n., lev. ber. r. Urka, ok 8 km S p. Erofei Pavlovich, 54˚ 02’24.84’’ N ♀ 121˚ 58’ 30.69’’E, h= 552 m , 28- 29.08.2014 , A.V. Shavrin , I. V. Enushchenko ". [ Amur Area , Skorovodinskiy District , left side of Urka river , about 8 km N Yerofey Pavlovitch , 54˚ 02’24.84 N / 121˚ 58’ 30.69’’E, h= 552 m , 28- 29.08.2014 , A.V. Shavrin , I. V. Enushchenko ]. Deposited in ZMM. D i a g n o s i s. Species similar in external characters to both Q . simulans SHARP, 1874 and Q . klapperichi SMETANA, 1996 , but different mainly by the aedoeagus with paramere wide, covering the entire median lobe. D e s c r i p t i o n. In all external characters similar to Q . klapperichi , but different as follows: size smaller than average specimens of Q . klapperichi , head shorter and wider, distinctly wider than long (ratio 1.20, corresponding ratio for Q . klapperichi 1.12); microsculpture distinctly finer and more superficial; antenna similar to that of Q . klapperichi , but distinctly more slender and shorter, with outer segments 7-10 distinctly transverse. Pronotum shorter and wider, more markedly wider than long (ratio 1.19, corresponding ratio for Q . klapperichi 1.10); left dorsal row with only two, right one with three punctures; scutellum with only a few punctures; elytra markedly shorter than those of Q . klapperichi , at suture about as long as, at sides longer than pronotum at midline (ratio 1.15); punctation and setation less dense than in Q . klapperichi ; punctation of abdominal tergites similar to that of Q . klapperichi , but in general somewhat less dense. Male. First four segments of front tarsus moderately dilated, sub-bilobed, each densely covered with tenent setae ventrally; segment 2 about as wide as apex of tibia; segment 4 narrower than preceding segments. Sternite 7 with slight medioapical sinuation; sternite 8 with four macrosetae at right side and three on left side, apical margin with wide, moderately deep, obtusely triangular medioapical emargination, a long, narrow area before emargination, reaching basal third of sternite, devoid of pubescence ( Fig. 7 ); tergite 10 evenly narrowed toward arcuate apex, with a few long setae at apex and some shorter setae in front of them ( Fig. 8 ); sternite 9 not appreciably different from that of Q . klapperichi ( Fig. 9 ). Aedoeagus ( Figs 10, 11 ) markedly different from those of both Q . simulans and Q . klapperichi ; median lobe narrow, subparallelsided, anteriorly narrowed into narrow apical part with acute apex; paramere large, wide, entirely covering median lobe, anteriorly narrowed into subacute apex surpasing distinctly apex of median lobe; four apical setae, medial pair considerably longer than lateral pair and two short setae at each lateral margin close to apex; underside with numerous sensory peg setae, forming irregular long row along each lateral margin of apical portion of paramere. Female unknown. Length 6.8 mm . E t y m o l o g y. The specific epithet is the Latinized adjective derived from the name of the river Amur and by adding the suffix - ensis , denoting the place of origin. G e o g r a p h i c a l d i s t r i b u t i o n. Quedius amurensis is at present known only from the type locality in Amur area. B i o n o m i c s. The specimen was sifted from litter and mosses at swampy site along a forest road with Ledum palustre , Vaccinium uliginosum , Calamagrostis purpurea , C. obtusata , Carex spp. and Sphagnum spp. in a mixed forest with Larix gmelinii , Betula fruticosa , B. platyphylla and Salix spp. ( Fig. 23 ). Figs 22-23 : ( 22 ) Type locality of Quedius conviva nov.sp. ; ( 23 ) Type locality of Quedius amurensis nov.sp. C o m m e n t s. The holotype bears an additional, small setiferous puncture anteriomediad of right posterior frontal puncture and it is missing the last segment of right front tarsus.