Linan denticulatus, Zhang, Yu-Qing, Li, Li-Zhen & Yin, Zi-Wei, 2018

Zhang, Yu-Qing, Li, Li-Zhen & Yin, Zi-Wei, 2018, Six new species and a new record of Linan Hlavac in China, with a key to species (Coleoptera, Staphylinidae, Pselaphinae), ZooKeys 793, pp. 115-133 : 118-120

Linan denticulatus sp. n. Figs 1B, 3, 11B

Type material.

(1 ♂, 1 ♀). Holotype: CHINA: ♂: 'China: N. Guizhou, Daozhen County (道真县), Dashahe N. R. (大沙河自然保护区), 29°10'12"N, 107°33'36"E, mixed leaf litter, sifted, 1730 m, 07.VII.2015, Jiang, Peng, Tu, & Zhou leg.'(SNUC). Paratype: CHINA: 1 ♀, same label data as the holotype, (SNUC).

Diagnosis of male.

Length 2.61mm; antennomeres IX–XI enlarged, lacking obvious modification; short metaventral processes narrowing toward apex, area above metacoxae projecting; protibia with distinct apical spine; metatrochanter with blunt, apically curved ventral projection.

Description.

Male (Figure 1B). Length 2.61mm. Head longer than wide, HL 0.57 mm, HW 0.51 mm; eyes each composed of about 18 facets. Antenna with scape about 2.8 times as long as wide, antennomeres II–VIII similar, each about as long as wide, antennomeres IX–XI enlarged, simple (Figure 3A). Pronotum (Figure 3B) about as long as wide, PL 0.53 mm, PW 0.52 mm. Elytra much wider than long, EL 0.64 mm, EW 0.90 mm. Metaventral processes (Figure 3C) short, pointed apically. Protrochanter and profemur (Figure 3D) simple, protibia with large, triangular spine at apex (Figure 3E); mesotrochanter and mesofemur simple (Figure 3F); metatrochanter (Figure 3G) with blunt, apically curved ventral projection. Abdomen slightly wider than elytra, AL 0.93 mm, AW 1.00 mm; tergite IV about twice as long as tergite V; sternite IX as in Figure 3H. Length of aedeagus (Figure 3 I–J) 0.48 mm; median lobe asymmetric, narrowing apically; elongate parameres expanded dorso-ventrally, slightly curved ventrally at basal 2/5 in lateral view.

Female. Similar to male in general morphology; eyes each composed of about 18 facets; antennae and legs simple; lacking metaventral processes. Measurements: HL 0.57 mm, HW 0.51 mm, PL 0.52 mm, PW 0.51 mm, EL 0.58 mm, EW 0.94 mm, AL 0.93 mm, AW 1.00 mm.

Distribution.

China: Guizhou (Figure 11B).

Etymology.

The specific epithet refers to the large apical spine of the protibia.

Comparative notes.

Linan denticulatus is placed as a member of the L. chinensis -group based on the unmodified male antennomeres IX–X, and externally resembles L. hujiayaoi Yin & Li from Guangxi. These two species share a similar form of the antennal club, short metaventral processes, and the blunt, apically curved ventral projection of the metatrochanter. They can be best separated by the much more distinct apical projection of the protibia, and median lobe of the aedeagus with a strongly narrowed apical part and much broader parameres in the new species.