Horniella jinggangshana Yin & Li

Yin, Zi-Wei & Li, Li-Zhen, 2015, Revision of the Oriental genus Horniella Raffray (Coleoptera, Staphylinidae, Pselaphinae) - Supplementum 1, ZooKeys 506, pp. 109-118 : 111-114

Taxon classification Animalia Coleoptera Staphylinidae

Horniella jinggangshana Yin & Li sp. n. Figs 1B, 3, 5 B–C

Type material

(1 ♂, 2 ♀♀). Holotype: China: ♂, labeled 'China: W. Jiangxi, Ji’an City, Jinggang Shan N. R. {井冈山自然保护区}, Shuikou {水口}, 26°32'42"N, 114°06'03"E, mixed leaf litter, sifted, 790-900 m, 30.vii.2014, J.Y. Hu / HOLOTYPE {red} ♂, Horniella jinggangshana sp. n., det. Yin & Li, 2015, SNUC’ (SNUC). Paratypes: China: 2 ♀♀, same label data as holotype (SNUC). Each paratype bears a following label: 'PARATYPE {yellow} ♀, Horniella jinggangshana sp. n., det. Yin & Li, 2015, SNUC’.

Description.

Male (Fig. 1B). Length 3.67 mm. Head as long wide, HL 0.75 mm, HW 0.75 mm; anterolateral genal projections (Fig. 3C) distinct, anterior margins slightly concave; median sulcus between antennal tubercles short and moderately deep; scapes (Fig. 3B) angularly expanded at basolateral margins; clubs (Fig. 3A) loosely formed by apical three moderately enlarged antennomeres; venter with pair of markedly long, curved lateral spines (Fig. 3D). Maxillary palpomeres II stout, broadened at middle. Each eye composed of about 35 facets. Pronotum slightly longer than wide, PL 0.76 mm, PW 0.72 mm. Elytra wider than long, EL 0.94 mm, EW 1.46 mm; discal striae reaching more than apical 2/3 of elytral length. Protrochanters and profemora (Fig. 3E) each with one distinct ventral spine, protibiae (Fig. 3F) each with short apical protuberance; mesotrochanters (Fig. 3G) each with one big ventral spine, mesofemora simple, mesotibiae (Fig. 3H) with small preapical denticles and short apical projection; tarsomeres II normal, not extending to beneath tarsomeres III. Abdomen large, AL 1.22 mm, AW 1.41 mm; tergite IV (first visible tergite) with short median carina, lacking lateral discal carinae; tergite V lacking median carina. Sternite IX (Fig. 3I) nearly oval, with well-sclerotized apical half and membranous basal half. AeL 0.82 mm; aedeagus (Fig. 3 J–L) with left half of median lobe greatly protruding in dorso-ventral view; endophallus composed of three long, curved sclerites.

Female. Similar to male in general appearance; scapes not expanded at basolateral margins; each eye composed of about 35 facets; profemora each with two subequal ventral spines near base, protibiae lacking preapical protuberance; mesotrochanters lacking ventral spine, mesotibiae lacking apical projection; tergite VII with posterior margin protruding at middle. BL 3.53-3.58 mm, HL 0.65-0.69 mm, HW 0.66-0.72 mm, PL 0.66-0.70 mm, PW 0.65-0.66 mm, EL 0.92-0.93 mm, EW 1.30-1.37, AL 1.26 -1.30 mm, AW 1.33-1.34 mm. Genital complex (Fig. 5 B–C) 0.43 mm wide, with broad apical portion, and coil-shaped basal portion.

Differential diagnosis.

The new species is placed as a member of the Horniella centralis group. Its closest congener is probably Horniella falcis Yin & Li, which is known from a single female. The females of these two species share a similar habitus, the protruding posterior margin of tergite VII, and a similar form of the genital complex. They can be tentatively separated by the less protruding posterior margin of tergite VII, the broader genital complex in dorsal-ventral view in Horniella jinggangshana , and their distributions (straight line distance of separation measures ca. 710 km). The males of Horniella jinggangshana can be readily separated from all other congeners by the unique form of the aedeagus and structure of the endophallus.

Distribution.

Eastern China: Jiangxi.

Etymology.

The new species is named after its type locality, the Jinggang Shan Nature Reserve.