Coelostoma

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 : 358-359

Coelostoma (s. str.) vividum Orchymont, 1936

( Figs 17–18 )

Coelostoma (s.str.) vividum Orchymont, 1936: 28 .

Type material examined: 1 male ( IRSNB): “♂ // Bengealis / Maindron 1885 // Cyclonotum / sp. X …. / Régimbart vid. 1895 // Para- / type // A. dʼOrchymont det. / Coelostoma / vividum m.”

Additional material examined. GUANGDONG: 2 males and 1 female, China, Guangdong, Fengkai, Heishiding Natrual Reserve, in light trap, 3.vi.2011, Fenglong Jia leg.

Diagnosis. Body size 4.1–4.2 mm. Prosternum weakly convex medially, not carinate, with a tiny tooth anteriorly. Head, pronotum and elytra with similar punctation; elytra with lateral portion slightly more strongly punctate, without traces of series of punctures laterally. Mesofemora without dense pubescence. First abdominal ventrite not carinate, last abdominal ventrite not emarginate or truncate apically. Aedeagus ( Figs. 17-18 ): 0.6 mm long. Median lobe narrow and almost parallel-sided, abruptly broadened basally, gonopore situating basally; parameres ca. 1.5× as wide as median lobe medially, not narrowed apically, slightly curved outside on apical third, inner margin straight, with sparse long setae (visible under compound microscope only).

Biology. Specimens examined by us were collected at light.

Distribution. China (Guangdong), Indonesia. ( Hansen 1999, Orchymont 1936). First record from China.

Figures

FIGURES 15 – 23. Aedeagus of Chinese Coelostoma. 15: C. fallaciosum, 16: C. vitalisi, 17 – 18: C. vividum (17: specimen from Guangdong: Heishiding; 18: paratype from Sumatra: Bengealis), 19: C. orbiculare, 20: C. bifidum sp. nov., 21: C. turnai (specimen from Hunan), 22: C. hajeki sp. nov., 23: C. hongkongene sp. nov.