Coelostoma (Lachnocoelostoma) phallicum Orchymont, 1940

Jia, Fenglong, Aston, Paul & Fikáček, Martin, 2014, Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae), Zootaxa 3887 (3), pp. 354-376 : 367-368

Coelostoma (Lachnocoelostoma) phallicum Orchymont, 1940

( Fig. 26 )

Coelostoma phallicum Orchymont, 1940: 158 .

Type material examined. PARATYPE: 1 male ( IRSNB): ‟♂ // Nordwestl. China / Chinkiang / Col. Reitter // Para / type ” [the specimen lacks identification label, but was placed among other paratypes of C. phallicum in the Orchymont collection and is clearly conspecific with them].

Additional material examined. HAINAN: 5 spec., Tongshi, 19.xii.1957, Cuiying Li leg., each with a label “ C. phallicum ”; 2 spec., same data as the former, but without detected label; 20 spec. ( SYSU, NMPC, SYSU): Bawangling Mts., 2 km SEE of Baotie, 7.v.2011, 19˚6.63′N 109˚6.10′E, 195 m; exposed pool with or without leaves on the horizontal rock shelves at sides of the stony river, night collecting [MF21], M. Fikáček & V. Kubeček leg. GUANGDONG: 1 male, Shaoguan, Danxiashan Mount, 27.v.2010, Fenglong Jia leg.; HUNAN: 1 male, Hengyang, 28.x.1940, Zhelong Pu leg., with a red label “ Holotype, Coelostoma hunanensis sp. nov. det. Wu Wu”; 1 female, same data as the former, but with a label “Allotype, Coelostoma hunanensis sp. nov. det. Wu Wu”. GUANGXI: 1 male, 1 female, outside of gate of Shiwandashan Forest Park, 263 m, in light trap, 7.vii.2011, Keqing Song leg.; 2 males, 2 females ( IZCAS), same data as the former. HONG KONG ( PCPA, 5 spec.): 1 male, 20.i.2009 Mui Wo Waterfall in moss on the waterfall, Paul Aston leg.; 1 female, v.2011 Wang Tong; 1 male, 9.viii.2008, Wang Tong, in light trap, Paul Aston leg.; 1 male, 1 female, 27.xi.2010, Tai Mo Shan in slimy water seepage, circa 800m, Paul Aston leg.

Diagnosis. Body size 5.2–5.5 mm. Prosternum somewhat convex medially, but not carinate, with anterior tooth. Head and pronotum with finer punctures than on elytra; elytra with lateral portion more or less strongly punctate, without traces of series of punctures laterally. Mesofemora densely pubescent, except at extreme apex. First abdominal ventrite not carinate; last ventrite emarginate and with a row of stout setae apically. Aedeagus ( Fig. 26 ): 1.4 mm long. Median lobe trilobed apically, much shorter than parameres, gonopore subapical.

Biology. Hygropetric.

Distribution. China (Guangdong, Hainan, Guangxi), Cambodia, Indonesia, Malaysia, Laos, Vietnam. ( Hansen 1999, Orchymont 1940). The record from Xinjiang of China by Orchymont (1940) needs to be reconfirmed.

Figures

FIGURES 24 – 31. Aedeagus of Chinese Coelostoma and related species. 24: C. coomani, 25: C. gentilii sp. nov., 26: C. phallicum, 27: C. huangi sp. nov., 28: C. martensi (paratype from Nepal), 29: C. wui, 30: C. vagum, 31: C. horni from southern Yunnan: Xishuangbanna).