Quedius (Raphirus) impressiventris, Smetana, Aleš, 2012

Smetana, Aleš, 2012, Contributions to the knowledge of the Quediina (Coleoptera, Staphylinidae, Staphylinini) of China. Part 42. Genus Quedius Stephens, 1829. Subgenus Raphirus Stephens, 1829. Section 10, Zootaxa 3156, pp. 43-68 : 56-57

publication ID	https://doi.org/ 10.11646/zootaxa.3156.1.2
DOI	https://doi.org/10.5281/zenodo.5910934
persistent identifier	https://treatment.plazi.org/id/A43A6804-FFBC-C71F-4BC5-4B3FFAD7B289
treatment provided by	Plazi
scientific name	Quedius (Raphirus) impressiventris
status	sp. nov.

Treatment

Quedius (Raphirus) impressiventris View in CoL sp. nov.

( Figs. 42–50 View FIGURES 32 – 42. 32 – 36 View FIGURES 43 – 54. 43 – 50 )

Type locality. People’s Republic of China: Sichuan, Gongga Shan , Lake above Camp 2, 2750 m.

Type material. Holotype (male) and allotype (female) : China: CHINA, Sichuan, Gongga Shan , Lake abv. Camp 2 2750 m, 24.VII. 1994 A. Smetana [C 20] . In the Smetana collection, Ottawa, Canada (to be eventually deposited in the Muséum d’histoire naturelle, Genève, Switzerland).

Paratypes: China: [Sichuan]: same data as holotype [89] ( ASC, MSC); same data as holotype, but 25. VII.1994, A. Smetana [C 23], [33] ( ASC); same data as holotype, but 27.VII. 1994, A. Smetana [C 27], [10] ( ASC); Gongga Shan, above Camp 3, 3050 m, 22.VII. 1994, A. Smetana [C 18], [5] ( ASC); Gongga Shan, Hailuogou, head of Glacier 1, 2850 m, 9. VII.1996, 29°35ʹN 10°200ʹE C 57 / collected by A. Smetana, J. Farkač and P. Kabátek [5] ( ASC); Gongga Shan, Hailuogou, Lake above Camp 2, 2750 m, 29°35ʹN 10°200ʹE, 4.VII. 1998, A. Smetana [C 74] / 1998 China Expedition J. Farkač, D. Král, J. Schneider & A. Smetana [5] ( ASC); Gongga Shan, Hailuogou, for. above Camp 2, 2800 m, 29°35ʹN 10°200ʹE, 5.VII. 1998, A. Smetana [C 75] / 1998 China Expedition J. Farkač, D. Král, J. Schneider & A. Smetana [2] ( ASC); Gongga Shan, Hailuogou, in front of Glacier 1, 2850 m, 29°35ʹN 10200ʹE, 7.VII. 1998, A. Smetana [C 76] / 1998 China Expedition J. Farkač, D. Král, J. Schneider & A. Smetana [42] ( ASC, NMW); W-Sichuan (7) Daxue Shan, W Kangding 3003ʹ13ʺN 10157ʹ11ʺE 2700–2800 m, 24.05. 1997, M. Schülke [1] ( MSC); W-Sichuan Ya’an Pref., Shimian Co. Daxue Shan, road betw. Anshunghang - Wanba, 20 km WSW Shimian, 1500 m, 9.VII. 1999, leg. A. Pütz [1] (APC).

Description. In all external characters similar to Q. aureiventris BERNHAUER, 1915 (detailed description in SMETANA 1988: 250), and different mainly by the male sexual characters, particularly by the shape of the aedoeagus, and by the uniformly dark pubescence of the elytra (elytral pubescence in Q. aureiventris is a mixture of dark and golden or golden-yellowish hairs).

M a l e. First four segments of front tarsus markedly dilated (about the same way as those of Q. aureiventris ), 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 8 with two long setae on each side, with wide, moderately deep medioapical emargination, not appreciably different from that of Q. aureiventris ( Fig. 42 View FIGURES 32 – 42. 32 – 36 ), small triangular area before emargination flattened and smooth. Genital segment with tergite 10 wider and less setose than that of Q. aureiventris ( Figs. 43, 51 View FIGURES 43 – 54. 43 – 50 ); sternite 9 wider than that of Q. aureiventris , with apex subtruncate to subemarginate ( Figs. 44, 52 View FIGURES 43 – 54. 43 – 50 ), with two slightly differentiated apical setae. Aedoeagus ( Figs. 45–49 View FIGURES 43 – 54. 43 – 50 ) narrow, elongate, similar to that of Q. aureiventris , but median lobe widely attenuate in middle portion (almost parallelsided in Q. aureiventris ), anteriorly distinctly widened before narrowed into apical portion with subacute apex ( Figs. 45, 47 View FIGURES 43 – 54. 43 – 50 ), apical portion darkened (in Q. aureiventris median lobe not widened before apical portion and apical portion not darkened), medial carina on face adjacent to paramere longer than that of Q. aureiventris , appearing as minute dent in lateral view; paramere parallelsided, similar to that of Q. aureiventris but in general wider, with arcuate apex not quite reaching apex of median lobe; four fine setae at apical margin ( Figs. 48, 49 View FIGURES 43 – 54. 43 – 50 ), medial setae sometimes longer than lateral ones ( Fig. 49 View FIGURES 43 – 54. 43 – 50 ), two similar setae at each lateral margin below apex; sensory peg setae on underside of paramere numerous, forming two variably long, slightly irregular, rows not appreciably different from those of Q. aureiventris ( Figs.48, 49 View FIGURES 43 – 54. 43 – 50 ).

F e m a l e. First four segments of front tarsus not appreciably dilated. Tergite 10 of genital segment somewhat wider and longer than that of Q. aureiventris , less densely setose ( Figs. 50, 53 View FIGURES 43 – 54. 43 – 50 ).

Length 4.3–5.0 mm.

Geographical distribution. Quedius impressiventris is at present known from the Daxue Shan range, particularly from Gongga Shan, in Sichuan.

Bionomics. The long series of specimens collected at the lake above Camp 2 on Gongga Shan was taken by submerging soaking wet moss and various vegetation, growing along the edges of the shallow lake, into water. Quedius euryalus Smetana, 1997 was collected in the same habitat.

Recognition and comments. Quedius impressiventris and the following species, Q. tergimpressus , are both similar and closely related to the Himalayan Q. aureiventris , as it is stipulated in the respective descriptions. They both differ from Q. aureiventris by the characters given in the descriptions, and they differ from each other by the characters on the aedoeagus. It is the distinct anterior widening of the median lobe of the aedoeagus ( Fig. 47 View FIGURES 43 – 54. 43 – 50 ) that is typical for Q. impressiventris and is absent in Q. tergimpressus ( Fig.58 View FIGURES 55 – 65. 55 – 61 ), and the fusiform paramere ( Fig. 57 View FIGURES 55 – 65. 55 – 61 ) that characterizes Q. tergimpressus .

Etymology. The specific epithet is a combination of the Latin adjective impressus, - a, - um (impressed) and the noun venter, - tris, m (abdomen). It refers to the inconspicuous impressions on the abdominal tergites.