Nomuraius vietnamicus Hlavac 2003
Creators: name: Yin, Zi-Wei
name: Li, Lizhen
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Nomuraius
Nomuraius vietnamicus

description: 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).
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).
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.
description: Published as part of Yin, Zi-Wei & Li, Lizhen, 2013, Taxonomic notes on the genus Nomuraius Hlaváč (Staphylinidae: Pselaphinae), pp. 563-573 in Revue suisse de Zoologie 120 (4) on pages 569-572, DOI: 10.5281/zenodo.7560404