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 (s. str.) madli Schönmann, 1995 ( Figs. 3–4 , 6 , 7 ) Pelthydrus madli Schönmann 1995 : 124 –125. Material Examined : 4exs. (IAECAS): CHINA : Yunnan Province , Ruili City, Dayingjiang National Scenic Area, Moli Management Office, 24°06'N , 98°00'E , 127 m , 18. 10. 2016 , leg Wang, Peng & Sun. 2exs. (IAECAS): CHINA : Yunnan Province , Ruili City, Moli First Production Team, 24°07'N , 98°00'E , 127 m , 18. 10. 2016 , leg Wang, Peng & Sun. Diagnosis. This species belongs to the Pelthydrus truncatus species group. Habitus as in Figs. 3–4 . BL: 2.90 – 3.05 mm , BW: 1.55 – 1.65 mm . Body elongate oval, dorsally nearly flat, apex of elytra (combined) truncated, surface shiny black. Head rather rectangular; anterior margin of clypeus straight; pronotum trapezoidal, with lateral margins nearly straight. Elytra almost parallel sided along basal 0.35, and then gradually narrowed posteriorly; small ground punctures sparsely distributed. Mesoventrite with apically acute triangular plate and median longitudinal carina; metaventrite with aposterior flask-shaped, flat and smooth glabrous area, whose bottleneck a little short; first sternite with a medial longitudinal carina not reaching posterior margin. Aedeagus ( Fig. 6 ). 0.50 mm long, nearly parallel sided, parameres about 1.1 times as long as phallobase; median lobe wide, gradually narrowing towards rounded apex, gonopore sinuated at distal 1/4; parameres somewhat exceeding median lobe, apical portion slightly pointing towards midline. Distribution. China : Yunnan (it is recorded from China for the first time), Thailand . Remarks . A newly generated partial sequences of cytochrome oxidase subunit I (COI) is deposited in GenBank under accession number MG554386 .