Taxonomic notes on the genus Nomuraius Hlaváč (Staphylinidae: Pselaphinae) Author Yin, Zi-Wei Department of Biology, College of Life and Environmental Sciences, Shanghai Normal University, 100 Guilin Road., Xuhui District, Shanghai, 200234, P. R. China. Author Li, Lizhen Department of Biology, College of Life and Environmental Sciences, Shanghai Normal University, 100 Guilin Road., Xuhui District, Shanghai, 200234, P. R. China. pselaphinae@gmail.com text Revue suisse de Zoologie 2013 2013-12-31 120 4 563 573 journal article 230909 10.5281/zenodo.7560404 95dd82fb-b63c-41cf-b40c-39d13e9363bb 0035-418X 7560404 Nomuraius vietnamicus Hlaváč, 2003 Figs 4-6 Nomuraius vietnamicus Hlaváč, 2003: 290 ; type locality north Vietnam , Vinh Phu Province , Tam Dao Mountains . HOLOTYPE : ♂ , labelled ‘Mt., Tam Dao / (- Tam Dao Hai) / Vinh Phu Prov. // [N-VIETNAM] / 25.ix.1995 / S. Nomura leg. // HOLOTYPE [red] / NOMURAIUS / vietnamicus sp. nov. / P. Hlaváč det., 2000’ ( NSMT ). PARATYPE : 1 ♂ , same label data as holotype ( NSMT ). OTHER MATERIAL EXAMINED (6 ♂♂, 5 ♀♀ ): 1 ♀ , labeled ‘Mt., Tam Dao ( 950 m ) / Vinh Phu Prov. / [N-VIETNAM] / 17.vi.1997 , S. Nomura leg.’ ( SNUC ); 1 ♂ , same label data, except ‘ 14.vii.1997 ’ ( SNUC ). – 1 ♂ , same label data, except ‘ 21.v.2003 ’ ( pcPH ). – 1 ♂ , 1 ♀ , same label data, except ‘ 23.v.2003 ’ ( SNUC ). – 1 ♂ , 1 ♀ , labeled ‘ VIETNAM , Tam Dao , / N21°29′27″ E 105°37′49″ / 13.v. 2012 . 1128 m. / sift 03. V. Grebennikov ( pcPH )’. – 1 ♀ , same label data, except ‘ N21°27′54″ E 105°38′56″ / 14.v.2012 . 1237 m / sift 04.’ ( pcPH ). – 2 ♂♂ , 1 ♀ , same label data, except ‘ N21°27′42″ E 105°38′48″ / 15.v.2012 , 1240 m / sift 05.’ ( pcPH , SNUC ). FIG. 4 Nomuraius vietnamicus Hlaváč, 2003 . (A) Male habitus (non-type). (B) Holotype habitus. (C) Type label. Scale: 1 mm . DIAGNOSIS: Length 2.70-3.11 mm . Male: maxillary palpomeres II roundly expanded laterally; head moderately concaved along posterior margin; pronotum with apical portion covered with tufts of setae; protibiae with short apical spur; metatibiae angularly expanded medially near apices. SUPPLEMENTARY DESCRIPTION Male ( Fig. 4A, B ): Length 2.99-3.10 mm . Head longer than wide, HL 0.71-0.73 mm , HW 0.56-0.57 mm , posterior margin moderately concaved; eyes each composed of about 25 facets. Antennal clubs as in Fig. 5A . Pronotum ( Fig. 5B ) about as long as wide, PL 0.66-0.68 mm , PW 0.65-0.66 mm , apical portion covered with sparse setose tufts; punctiform median- and lateral antebasal foveae small. Elytra wider than long, EL 0.81-0.82 mm , EW 1.11-1.12 mm . Long metaventral processes with pointed apices ( Fig. 5C ). Trochanters and femora ( Figs 5D, F, G ) simple; protibiae ( Fig. 5E ) with short apical spur; metatibiae angularly expanded medially near apices ( Fig. 5H ). Abdomen broad at base and narrowed apically, AL 0.81-0.87 mm , AW 1.10-1.11 mm . Tergite VIII ( Fig. 5I ) and sternite VIII ( Fig. 5J ) transverse, sternite IX as in Fig. 5K . Aedeagus length 0.56 mm , with symmetric median lobe apically bent rightwards ( Figs 5 L-N). FIG. 5 Male diagnostic features of Nomuraius vietnamicus Hlaváč, 2003 . (A) Antenna. (B) Pronotum. (C) Metaventral process, in lateral view. (D) Protrochanter and profemur. (E) Apical portion of protibia. (F) Mesotrochanter and mesofemur. (G) metatrochanter and metafemur. (H) Apical portion of metatibia. (I) Tergite VIII. (J) Sternite VIII. (K) Sternite IX. (L) Aedeagus, in dorsal view. (M) Same, in lateral view. (N) Same, in ventral view. Scales [mm]: A, B, D, F, G = 0.3; C, I, J, L, M, N = 0.2; H, K = 0.1, E = 0.05. FIG. 6 Distribution of Nomuraius Hlaváč. (Circle) N. piaoacus sp. n. (Square) N. vietnamicus Hlaváč. (Triangle) N. sinicus sp. n. Female : Measurements: BL 2.97-3.11 mm , HL 0.71-0.72 mm , HW 0.55-0.56 mm , PL 0.63-0.64 mm , PW 0.65-0.68 mm , EL 0.75- 0.7 mm , EW 1.11-1.12 mm , AL 0.87-0.98 mm , AW 1.16-1.20 mm . Eyes each compose of about 22 facets. Head, pronotum, protibiae and metatibiae simple; maxillary palpomeres II shortly projecting laterally. DISTRIBUTION AND NATURAL HISTORY: This species is known from several localities at the Tam Dao Mountain, north Vietnam . Individuals were collected from sifted leaf litter of forest floor. COMPARATIVE NOTES: As discussed above, N. vietnamicus is allied to Nomuraius sinicus , but can be separated by the relatively shorter pronotum and elytra, the more distinctly medially-expanded apical portion of the metatibiae, the transverse male tergite VIII, and the rightwards-curved apical portion of the aedeagal median lobe.