Linan geneolatus, 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 : 121-125

Linan geneolatus sp. n. Figs 4B, 6, 11A

Type material.

(1 ♂). Holotype: CHINA: ♂: 'China: N. Guizhou, Daozhen County, Dashahe N. R., 29°10'12"N, 107°33'36"E, mixed leaf litter, sifted, 1730 m, 07.VII.2015, Jiang, Peng, Tu, & Zhou leg.' (SNUC).

Diagnosis of male.

Length 3.06 mm; postgenae broadly expanded laterally; antennomeres IX–X strongly modified, IX strongly projecting at anterolateral corner, X broadly concave at basal half; metaventral processes short; metatrochanter with short, blunt ventral projection.

Description.

Male (Figure 4B). Length 3.06 mm. Head slightly longer than wide, HL 0.69 mm, HW 0.66 mm; postgenae expanded laterally; eyes prominent, each composed of about 22 facets. Antenna with scape about 3.8 times as long as wide, antennomeres II–IV and VIII similar, each about as long as wide, V–VII each slightly longer than wide, antennomere IX (Figure 6A) broad, strongly projecting at anterolateral corner, antennomere X transverse, broadly concave at basal half. Pronotum (Figure 6B) about as long as wide, PL 0.60 mm, PW 0.59 mm. Elytra much wider than long, EL 0.69 mm, EW 0.98 mm. Metaventral processes (Figure 6C) short, narrowing at apex in lateral view. Protrochanter and profemur (Figure 6D), and mesotrochanter and mesofemur (Figure 6E) simple; metatrochanter (Figure 6F) with short, blunt ventral projection. Abdomen slightly wider than elytra, AL 0.99 mm, AW 1.06 mm; tergite IV about twice as long as tergite V; sternite IX as in Figure 6G. Length of aedeagus (Figure 6 H–J) 0.44 mm; median lobe nearly symmetric, strongly constricted at middle of apex.

Female. Unknown.

Distribution.

China: Guizhou (Figure 11A).

Etymology.

The new specific epithet refers to the strongly expanded postocular margins.

Comparative notes.

The new species is placed as a member of the L. cardialis -group based on the strongly modified antennomere IX in the male, and is most similar to L. huapingensis in the shape of antennomere IX and spinose metatrochanter in the male. These two species can be separated by antennomere X being strongly excavate at the basal half, and the short metaventral processes in males of the new species, while in L. huapingensis the antennomere X lacks an excavation, and the metaventral processes are much longer and thinner. Otherwise, Linan geneolatus is the only member of the genus that exhibits broadened postgenae, which makes it readily separable from all other congeners.