Labomimus minshanus, Zhang & Li & Yin, 2019

Zhang, Yu-Qing, Li, Li-Zhen & Yin, Zi-Wei, 2019, Fifteen new species and a new country record of Labomimus Sharp from China, with a checklist of world species (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4554 (2), pp. 497-531 : 517

Labomimus minshanus sp. nov.

( Figs. 16A , 17 )

Type material (4 ♂♂, 2 ♀♀). Holotype: CHINA: ♂: ‘ CHINA: [16] – S-Gansu, S Longnan , Min Shan (岷山), 33°03′13′′N, 104°40′57′′E, 2200 m, 6.VIII.2012, V Assing’ (pcVB) . Paratypes: CHINA: 1 ♀ : same label data as the holotype, (pcVB); 3 ♂♂, 1 ♀: ‘ CHINA: S-Gansu [GH 12-16], Min Shan , 45 km SW Longnan, 33°03′13′′N, 104°40′57′′E, 2200 m, secondary pine forest with hazelnut, moist litter and roots sifted, 6.VIII.2012, leg. M. Schülke’ (pcMS) .

Diagnosis of male. Length over 3.0 mm; antennomeres IX–XI enlarged, X transverse; pronotum with round lateral margins; elytra in contrast to abdomen relatively small; long metaventral processes slightly bifurcate at apex; protibia with small apical spine; mesotrochanter with tiny ventral spine; metacoxa with blunt ventral projection; aedeagus slightly asymmetric, with median lobe narrowed at apex.

Description. Male ( Fig. 16A ). Length 3.16–3.27 mm. Head slightly longer than wide, HL 0.63–0.64 mm, HW 0.58–0.62 mm; eyes small, each composed of about 20 facets. Antenna with scape about 3.8 times as long as wide, antennomeres II–VIII each strongly to slightly elongate, antennomeres IX and XI ( Fig. 17A ) simple, X transverse. Pronotum ( Fig. 17B ) slightly longer than wide, PL 0.61–0.62 mm, PW 0.58–0.59 mm, with round lateral margins. Elytra small, much broader than long, EL 0.69–0.71 mm, EW 0.98–1.02 mm. Metathoracic wings reduced. Metaventral processes ( Fig. 17C ) long, slightly bifurcate at apex in lateral view. Protrochanter and profemur ( Fig. 17D ) simple; protibia ( Fig. 17E ) with small but distinct spine at apex; mesotrochanter ( Fig. 17F ) with tiny ventral spine, mesofemur simple; metacoxa ( Fig. 17G ) with short, apically rounded ventral projection. Abdomen broad at base and narrowed posteriorly, AL 1.23–1.30 mm, AW 1.03–1.07 mm; tergite IV longest, more than twice as long as tergite V; sternite IX as in Fig. 17H . Length of aedeagus ( Fig. 17 I–K) 0.44 mm; median lobe asymmetric, narrowing apically; elongate parameres expanded dorso-ventrally, apex flattened.

Female. Similar to male in general morphology; eyes each composed of about 23 facets; antennae and legs simple, lacking metaventral processes. Measurements: BL 3.14–3.17 mm, HL 0.63–0.66 mm, HW 0.57–0.58 mm, PL 0.59–0.61 mm, PW 0.61–0.62 mm, EL 0.71–0.72 mm, EW 1.02–1.03 mm, AL 1.19–1.20 mm, AW 1.10–1.11 mm.

Distribution. China: Gansu.

Etymology. The new species is named after the type locality, i.e., Minshan.

Comparative notes. The new species is most similar to Labomimus assingi sp. nov. described above by sharing a similar general appearance, the rounded pronotal lateral margins, and the relatively small elytra. They can be readily separated by the much shorter projection of the metacoxa in the male of L. minshanus sp. nov., the different form of the apex of the aedeagal median lobe, and their distributions.

Figures

FIGURE 16. Dorsal habitus of Labomimus males. A. L. minshanus. B. L. niger. Scale bar: 1 mm.

FIGURE 17. Diagnostic features of Labomimus minshanus, male. A. Antennal club. B. Pronotum. C. Metaventral process, in lateral view. D. Protrochanter and profemur. E. Apex of protibia. F. Mesotrochanter and mesofemur. G. Metatrochanter and metafemur. H. Sternite IX. I–K. Aedeagus, in dorsal (I), lateral (J), and ventral (K) view. Scale bar: A, B, D, F, G = 0.3 mm; C, I, J, K = 0.2 mm; H = 0.1 mm; E = 0.05 mm.