A new species and a new record of Pelthydrus Orchymont, 1919 from Yunnan, China (Coleoptera: Hydrophilidae: Hydrophilinae) Author Zhu, Bingyue Author Ji, Lanzhu Author Bian, Dongju text Zootaxa 2018 2018-06-20 4438 1 189 194 journal article 29846 10.11646/zootaxa.4438.1.12 21b9288c-7301-4b31-9fe1-6397eef9709f 1175-5326 1294265 5914EBFF-4C15-47B8-8866-50AD03D7E297 Pelthydrus sculpturatus group Diagnosis. (Modified from Schönmann 1995 ): median size ( 2–3 mm ), body oval to broadly oval, slightly convex, with complete surface shiny; color dark brown to black. Eyes small; surface of head and pronotum microreticulate. Lateral margins of pronotum slightly converging towards anterior angles; posterior corners rounded; surface densely covered with ground punctures; Elytral surface smooth, irregular median-sized punctures rough, evenly distributed, forming striae on both sides of elytra. Mesoventrite elevated posteriorly producing a triangular plate which with a median longitudinal carina; metaventrite progressively elevated towards posterior part of plate, with a cordiform, shiny, and glabrous area posteriorly. Distribution. China , Thailand , Malaysia , Indonesia .