Oocyclus dinghu Short & Jia

Short, Andrew Edward Z. & Jia, Feng-Long, 2011, Two new species of Oocyclus Sharp from China with a revised key to the genus for mainland Southeast Asia (Coleoptera: Hydrophilidae), Zootaxa 3012, pp. 64-68 : 66-67

Oocyclus dinghu Short & Jia sp. n.

( Fig. 2 B)

Type material. Holotype (male): “ CHINA: Guandong Prov./ Dinghu Nat. Res./ 30.10.2001, ca. 50-150m / Jäch & Komarek ( CWBS 454)” ( NMW). Paratypes (56): CHINA: Guangdong Province: Same data as holotype (7: NMW, USNM); Danxia Mount, 4.xi.2010, leg. F.L. Jia (6 exs.: SYSU), Fengkai/Heishiding Nature Reserve, 2.v.2011, leg. F.L. Jia (38 exs.: SYSU); W. of Qixing, Heishiding Nature Reserve, 190-260m, 1-3.v.2011, on wet rocks, leg. Fikáček & Hajek (5 exs.: NMPC, USNM).

Diagnosis. See diagnosis of O. fikaceki .

Description. Size and Form. Total body length = 3.9–4.2 mm. This species is very similar to O. fikaceki , but differs in the following characters: Maxillary palps uniformly yellow, apex not darkened. Ground punctuation on pronotum smaller and more finely impressed, such that the systematic punctures are more distinct. Aedeagus ( Fig. 2 B) with outer margin of parameres nearly straight, with apex of slightly swollen on the inner margin; apex of median lobe weakly sinuate, with gonopore situated less than half its length below it.

Etymology. Named for the type locality, Dinghu Mountain Nature Reserve. Distribution. Known from two localities in Guangdong Province, China. Biology. Found in hygropetric habitats such as wet rock faces.

Figures

FIGURE 2. Dorsal view of the aedeagus of Oocyclus spp., A) O. fikaceki sp. n., paratype, B) O. dinghu sp. n., holotype (scale bar = 0.25 mm).