Linan divaricatus, 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

Linan divaricatus sp. n. Figs 4A, 5, 11A

Type material.

(7 ♂♂). Holotype: CHINA: ♂: 'China: W. Jiangxi Province, Luxi County (芦溪县), Wugong Shan (武功山), 27°27'53"N, 114°10'47"E, mixed forest, leaf litter, wood sifted & beating, ca. 1570 m, 27.x.2013, Peng, Shen & Yan leg.'(SNUC). Paratype: CHINA: 3 ♂♂, same label data as holotype; 1 ♂, Jiangxi, Pingxiang City, Wugong Shan National Park, 27°27'55"N, 114°09'58"E, cableway station to Baoshui Waterfall, broad leaf, sifted, 1000-1350 m, 20.vii.2013, Song, Yin, Yu leg.'; 2 ♂♂, 'China: W. Jiangxi Province, Luxi County, Yangshimu(羊狮幕), 27°33'38"N, 114°14'35"E, mixed forest, leaf litter, wood sifted & beating, ca. 1580m, 25.x.2013, Peng, Shen & Yan leg.' (all in SNUC).

Diagnosis of male.

Length 2.74-2.82 mm; antennomeres IX–X strongly modified, antennomere IX angulate at anterolateral corner, obliquely connecting with strongly transverse antennomere X; broad metaventral processes bifurcate at apex; protibia with small apical spine; mesotrochanter with tiny ventral spine.

Description.

Male (Figure 4A). Length 2.74-2.82 mm. Head longer than wide, HL 0.60-0.64 mm, HW 0.55-0.56 mm; eyes each composed of about 30 facets. Antenna with scape about 4.2 times as long as wide, antennomeres II–III and VIII similar, each about as long as wide, IV–VII each longer than wide, antennomere IX (Figure 5A) strongly expanded, angulate at anterolateral corner, antennomere X strongly transverse, obliquely connecting with IX. Pronotum (Figure 5B) slightly longer than wide, PL 0.56-0.57 mm, PW 0.49-0.51 mm. Elytra much wider than long, EL 0.62-0.64 mm, EW 0.87-0.90 mm. Metaventral processes (Figure 5C) broad, bifurcate at apex in lateral view. Protrochanter and profemur simple (Figure 5D), protibia with indistinct spine (Figure 5E) at apex; mesotrochanter (Figure 5F) with tiny ventral spine, mesofemur simple; metatrochanter and metafemur simple (Figure 5G). Abdomen slightly wider than elytra, AL 0.96-0.97mm, AW 0.89-0.93 mm; tergite IV about twice as long as tergite V; sternite IX as in Figure 5H. Length of aedeagus (Figure 5 I–K) 0.45 mm; median lobe symmetric, pointed apically at middle; parameres strongly curved ventrally and constricted at apices in lateral view.

Female. Unknown.

Distribution.

China: Jiangxi (Figure 11A).

Etymology.

The new specific epithet refers to the long and bifurcate metaventral processes.

Comparative notes.

The new species belongs to the L. cardialis -group based on the strongly modified male antennomere IX. Linan divaricatus is most similar to L. huapingensis and L. geneolatus sp. n. (described below) in sharing both the angulate anterolateral corner of male antennomere IX, and median lobe of aedeagus strongly constricted at middle of the apex. From both latter species the new species differs by the relatively much broader antennomere IX, much broader metaventral processes bifurcate at the apex, and simple metatrochanter. In L. geneolatus sp. n., the male antennomere X is also strongly excavate at basal half.