Coelostoma (Lachnocoelostoma) wui 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 : 369

Coelostoma (Lachnocoelostoma) wui Orchymont, 1940

( Fig. 29 )

Coelostoma wui Orchymont, 1935: 197 (nomen nudum). Coelostoma wui Orchymont, 1940: 160 .

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

Additional material examined. JIANGXI: 95 spec., Longnan, Jiulianshan, 06-vii.2008, Fenglong Jia leg.; 1 male, Sanqingshan Mount, 15.viii.2006, Fenglong Jia leg.; 12 spec. ( NMPC, KSEM): Jinggangshan Mts., Xiangzhou, forested valley S of the village, 26°35.5ʼN 114°16.0ʼE, 374 m, under the stones and among sand at the bak of a stony river below the bridge [MF08], 26.iv.2011, Fikáček & Hájek leg. HUBEI: 1 male, Zigui, Maoping, 80m, 28.iv.1994, Wenzhu Li leg. HUNAN: 1 male, Qianjiang, Anjiang, 20.vi.1965, Zhenyao Chen leg.; 2 spec., Huaihua, Yushuwan, 17.vi.1965, Zhenyao Chen leg. SHANDONG: 1 male, Tai’an, with a label “ Coelostoma fabriciusi ?” and another label “ stultum ”. SHAANXI: 1 male, 1 spec., Xi’an, Dayu, 12.v.2011, Fenglong Jia leg.

Diagnosis. Body size 5.2–5.8 mm. Prosternum moderately convex medially, not carinate, with a distinct anteromedian tooth. Head, pronotum and elytra with similar punctures; elytra with lateral portion more or less strongly punctate, without traces of series punctures laterally. Mesofemora densely pubescent, except at extreme apex. First abdominal ventrite distinctly carinate basally, fifth ventrite emarginate and with a row of stout setae apically. Aedeagus ( Fig. 29 ): 1.8 mm long. Median lobe slightly widening from base to apex, apex widely rounded; gonopore small, narrow, situated subapically; parameres much longer than median lobe, strongly bent inwards in apical third, truncate apically.

Biology. Hygropetric. Part of the specimens was collected from under stones at the bank of a stony mountain river, and from wet rock with some algae.

Distribution. China (Hubei, Hunan, Jiangxi, Shaanxi, Shandong), Korea. ( Hansen 1999). The record from Xinjiang of China ( Orchymont 1940) needs reconfirmation.

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).