Cerochusa cilioceps Yin and Nomura

Yin, Zi-Wei, Nomura, Shûhei & Li, Li-Zhen, 2012, Redescription of Ceroderma asperata Raffray, and description of Cerochusa cilioceps gen. et sp. n. from Hainan, South China (Coleoptera, Staphylinidae, Pselaphinae), Zootaxa 3355, pp. 62-68 : 68

Cerochusa cilioceps Yin and Nomura , new species

( Figs. 2 , 12–18 )

Type material ( SNUC). Holotype: CHINA: 3, labeled ‘ China: Hainan Prov. / Ledong County / Jianfengling N. R. / 19.v.2011, alt. 1,000 m / Wen-Xuan BI leg.’; Paratype: CHINA: Ƥ, same label data as holotype, except ‘Jianfengling N. R. / core area No. V, 978 m / 3.xii.2009 / 18.73236° N / 108.87023° E / Mei-Ying Lin leg.’.

Diagnosis. Head triangular; vertex convex medially, U-shaped sulcus connecting well-defined foveae; postocular margins expanded laterally to form thick triangular tubercles; triangular pronotum broadly and deeply incised at level of lateral antebasal foveae; elytra barely constricted at base, with two large basal foveae; tergite IV about twice length of V.

Description. Male. BL 2.39. Body ( Fig. 2 ) reddish brown, maxillary palpi and tarsi lighter; head, pronotum and elytra covered with dense setae, microtuberculate where setae arise. Head ( Fig. 12 ) much wider than long, HL 0.36, HW 0.64; vertex with tuft of setae anterior to transverse arched median carina, vertexal foveae connected by U-shaped sulcus, sulcus broken at anterior margin; eyes well-developed, each composed of about 65 facets; antennomeres II–VIII ( Fig. 13 ) of similar width, VIII–X distinctly transverse; clubs formed by enlarged antennomeres IX–XI. Pronotum much wider than long, PL 0.50, PW 0.83; with distinct longitudinal median and lateral sulci;with discal carinae at middle; lateral and antebasal spines large. Elytra wider than long, EL 0.76, EW 0.98; barely constricted at basal half. Metaventrite concave medially. Legs with thick femora; mesotibiae ( Fig. 14 ) with tiny membranous apical projections; metatrochanters lack projection at ventral margin. Abdomen wider than long, AL 0.77, AW 0.89; tergites IV–VI with thick triangular lateral ridges; tergite VI ( Fig. 15 ) with short discal carinae close, reaching one-fifth tergal length; tergite VII with small lateral protuberances. Sternite IV twice length of V at midline, with inner pair of basolateral foveae close to mediobasal foveae; sternites V–VII lacking foveae. Aedeagus ( Figs. 16–18 ) well-sclerotized, length 0.33; basal bulb with large foramen, elongate median lobe sharpened apically.

Female. Similar to male in general. Measurements: BL 2.39, HL 0.36, HW 0.63, PL 0.49, PW 0.82, EL 0.74, EW 0.97, AL 0.80, AW 0.92. Vertex lacking transverse carina and tufted setae. Each eye composed of about 60 facets. Mesotibiae lacking apical tubercle.

Distribution. South China: Hainan Island.

Host ant. Vollenhovia Mayr sp. (det. A. Radchenko).

Figures

FIGURE 1 – 2. Dorsal habitus of Ceroderma asperata (1) and Cerochusa cilioceps (2). Scales: 0.5 mm.

FIGURE 12 – 18. Cerochusa cilioceps. 12. Head and pronotum. 13. Antenna. 14. Apex of mesotibia. 15. Left half of tergite IV. 16. Aedeagus, in dorsal view. 17. Same, in lateral view. 18. Same, in ventral view. Scales: a, b = 0.5 mm; c = 0.05 mm; d – g = 0.2 mm.