Revision of the Oriental genus Horniella Raffray (Coleoptera, Staphylinidae, Pselaphinae) Yin, Zi-Wei Li, Li-Zhen Zootaxa 2014 2014-08-12 3850 1 1 83 3MPY7 Yin and Li Yin and Li [180,561,1806,1832] Insecta Staphylinidae Horniella Animalia Coleoptera 27 28 Arthropoda species simplaria sp. nov.   Figs 16A, 17; Map 1    Typematerial( 1 ♂).  Holotype, ♂, labeled ‘ CHINA, Guangxi, Dawangling[ca. 23°44’N, 106°17’ E],  1190 m,  6.viii.1999, J. R. Fellowes/ Rougemont collection / Holotype [red], ♂,  Horniella simplaria  sp. n., det. Yin& Li, 2014, pcPH’.   Description.Male ( Fig. 16A). Length 3.23 mm. Head longer than wide, HL 0.70 mm, HW 0.61 mm; anterolateral genal projections ( Fig. 17C) weakly indicated, anterior margins oblique; median sulcus between antennal tubercles short; scapes ( Fig. 17B) lacking expansion at basolateral margins; clubs ( Fig. 17A) loosely formed by apical three moderately enlarged antennomeres; venter lacking lateral spines ( Fig. 17D). Maxillary palpomeres II slightly broadened from base toward apex. Each eye composed of about 36 facets. Pronotum slightly longer than wide, PL 0.75 mm, PW 0.70 mm. Elytra wider than long, EL 0.89 mm, EW 1.24 mm; discal striae reaching apical 5/6 of elytral length. Protrochanters ( Fig. 17E) lacking ventral spine, profemora with one short and one much longer ventral spine near base, ventral margin broadly expanded at basal 1/3, protibiae ( Fig. 17F) each with one triangular projection at mesal margin near apical 1/3, and one small apical spur; mesotrochanters, mesofemora ( Fig. 17G) and mesotibiae ( Fig. 17H) simple; tarsomeres II normal, not extending to beneath tarsomeres III. Abdomen large, AL 0.89 mm, AW 1.31 mm, tergite IV (first visible tergite) with median carina extending to half tergal length, lacking lateral discal carinae, tergite V lacking median carina. Sternite IX ( Fig. 17I) with well-defined apical section, apical half well-sclerotized and basal half membranous. AeL 0.61 mm; aedeagus ( Figs 17J–L) with nearly symmetric median lobe except for strongly pointed margin on right side; endophallus composed of one broad, semi-membranous sclerite with angular apex, and one elongate, securiform sclerite.   FIGURE 17.Male diagnostic features of  Horniella simplaria  sp. n.A.Antenna. B.Scape. C.Right half of head, in dorsal view. D.Head, in lateral view. E.Protrochanter and profemur. F.Protibia. G.Mesotrochanter and mesofemur. H.Mesotibia. I.Sternite IX. J.Aedeagus, in dorsal view. K.Same, in lateral view. L.Same, in ventral view. Scales: 0.3 mm, except B, I = 0.1 mm. Female. Unknown.   Differential diagnosis.This is a distinctive species placed as a member of the  H. hirtellagroup. The male is similar to those of  H. hirtellaby sharing the presence of one short and one much longer spine on ventral margin of the protibiae, and a similar form of the aedeagus.  Horniella simplariais the only member of the group that has a distinctive triangular projection on the mesal margin of the protibia at its apical 1/3. The endophallus of this species consists of two sclerites, but lacks small denticles on the membranous part, which are commonly present in other species of the group.   Distribution.South China: Guangxi ( Map 1).   Collection notes.Unknown.   Etymology.The specific name indicates a simple aedeagal form of the new species. 3699163305 1999-08-06 pcPH J. R. Fellowes China Yin & Li 1190 23.733334 Dawangling 1254 106.28333 Guangxi 27 28 1 1 holotype