Scaphidium yinziweii, Tang & Li, 2012

Tang, Liang & Li, Li-Zhen, 2012, Two new species of the genus Scaphidium from China (Coleoptera: Staphylinidae: Scaphidiinae), Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 185-192 : 186-189

Scaphidium yinziweii sp. nov.

( Figs. 1, 2 , 9–12 )

Type locality. China, Yunnan Province, Nabanhe National Reserve, Benggang Hani, 22°08.383′N, 100°34.126′E, 1700 m a.s.l.

Type material. HOLOTYPE: J, China, Yunnan Prov., Nabanhe N. R., Benggang Hani, alt. 1700m, 29.IV.2009, J.-Y. HU & Z.-W. YIN leg. ( SHNU).

Description. Body black; elytra yellow, yellow area narrowly surrounded by black band, latter broadened and spot-like on humeral area. Elytral disc with two oval black spots: large spot joint to black band along the suture, small spot joint to black band along the lateral margin; antennal segments I–VI reddish brown, segments VII–XI black with last segment yellowish brown on apical third ( Fig. 12 ).

Body measurements: BL: 6.1 mm, ED: 0.29 mm, PL: 1.98 mm, PW: 2.85 mm, EW: 3.18 mm.

Head with punctation on frons small and moderately dense. Pronotum slightly raised above elytra, antebasal puncture row impressed, disc with punctation slightly larger than that of frons. Elytra with punctation of black portion similar to that of pronotum, punctation of yellow portion faint to obsolete. Prohypomera uneven without punctures and microsculpture. Mesepisterna sparsely punctated. Exposed abdominal tergites with coarse punctures and microsculpture consisting of very fine punctures. Ventrite I with most of centre coarsely and moderately densely punctate and lateral portion sparsely punctate. Entire sternite I with microsculpture consisting of very fine punctures.

Male. Metaventrite with long pubescence covering about 3/4 of median portion. Profemur ( Fig. 11 ) with ventral side slightly expanded. Protibiae ( Fig. 11 ) slightly sinuate, inconspicuously prominent on about apical 1/5 of ventral side and forming indistinct ridge. Aedeagus ( Fig. 9 ) with internal sac ( Fig. 10 ) comprising large triangular apical sclerite and basal sclerites complex which consists of three pairs of small sclerites.

Differential diagnosis. Scaphidium yinziweii sp. nov. can be distinguished by its color pattern, in which the new species resembles S. zhoushuni He, Tang & Li, 2009 ( Figs. 3, 4 ) from Shaanxi Province and S. incrassatum Achard, 1920 ( LÖBL 1992: Fig. 12 ) from Burma and India. It differs from them by the elytron lacking an inner basal black spot near the scutellum and having a large black spot entirely connected to the black band along the suture. In addition, the male protibia is less expanded subapically and the shape of the sclerites of the internal sac are different: in S. zhoushuni , the apical sclerite is very short and the basal sclerites complex is very small. The male of S. incrassatum is unknown.

Etymology. The species is named in honor of Dr. Zi-Wei Yin (Shanghai), who collected the holotype.

Habitat. Collected in flight in a broadleaved forest.

Distribution. China (Yunnan). Known only from the type locality.

Figures

Figs. 1–4. Male habitus of Scaphidium Olivier, 1790. 1–2 – S. yinziweii sp. nov., holotype; 3–4 – S. zhoushuni He, Tang & Li, 2009, paratype. Scale bars: 1 mm.

Figs. 9–12. Scaphidium yinziweii sp. nov. 9 – aedeagus; 10 – internal sac; 11 – male front leg; 12 – antenna. Scale bars: 0.25 mm (9–10); 1 mm (11–12).