Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae) Author Jia, Fenglong Author Tang, Yudan Author Minoshima, Yûsuke N. text Zootaxa 2016 4208 6 561 576 journal article 37381 10.11646/zootaxa.4208.6.4 f06747dd-fe3e-4ca0-934a-8302dfbfe6e1 1175-5326 215062 9ED97579-934D-4156-9EDF-5465ED302326 Crenitis ( Crenitis ) lianggeqiui sp. nov. ( Figs. 10–17 , 51 , 60–62 , 74 ) Type material: Holotype : CHINA Yunnan : male ( SYSU ), CHINA : Yunnan Prov., Jingdong / County , Ailaoshan Nature / Reserve , 24°32′N 101°01′E / 2484m , 12-14.iv.2015 / Renchao Lin & Yudan / Tang leg [transcribed from Chinese]. Paratypes (17 specs., KMNH , NMPC , NMW , SUSU , APC ): CHINA : Yunnan : 7 specs, same data as holotype . Sichuan : 10 specs, CHINA : W-Sichuan / Ya’an Pref., Shimian Co. / Xiaoxiang Ling , Pass betw. / Shimian-Ganluo , 27km SE / Shimian , 2450m , springfed- / swamp, 29.02.75 N, 102.31.48E/ 8.VII.1999 , leg. A. Pütz . FIGURES 10–17. Crenitis lianggeqiui sp. nov. 10–12: Habitus (10: dorsal view, 11: ventral view, 12: lateral view); 13: head and pronotum, dorsal view; 14: head and prosternum, ventral view; 15: meso- and metaventrite, ventral view; 16: abdomen, ventral view; 17: pronotum, lateral view. Diagnosis. Body obovate. Head and pronotum without impression and microsculpture ( Figs. 13, 17 ). Anterior margin of labrum bearing a transverse row of setae. Pronotal punctures uneven, denser laterally than mesally. Ground punctures on elytra rather coarse, ten rows of large punctures present on posterior half of elytra ( Figs. 10, 12 ). Mesoventrite flat. Meso- and metafemora pubescent on basal four-fifths ( Fig. 60 ). Parameres with lateral incisions subbasally and subapically, widening in midlength, apex weakly projecting laterally. Apex of median lobe situated ca. apical ninth of paramere in length ( Fig. 51 ). This species is very similar to C. aduncata and C. obovata . Ground punctures on elytra of C. lianggeqiui are generally coarser than C. aduncata and C. obovata ; reliable identification requires a careful examination of the male genitalia. Genital morphology is similar to that of C. obovata : apex of median lobe is situated subapically in the species ( Fig. 51 ), whereas that of C. obovata is situated in apical fourth ( Fig. 23 ). Description. Length 3.5–3.9 mm, width 2.1–2.4 mm. Body obovate, attenuating posteriorly, convex ( Fig. 10 ). Color. Dorsal surface black to dark reddish brown, pronotum somewhat reddish brown, lateral margins of pronotum yellowish brown ( Fig. 13 ). Maxillary and labial palps and antennae uniformly yellowish brown, with infuscate antennal club. Ventral surface dark reddish brown, legs usually dark brown ( Fig. 11 ). Head. Labrum densely punctate, with broadly emarginate anterior margin; anterior margin of labrum bearing a row of setae densely distributed. Clypeus truncate anteriorly, with dense punctures ( Fig. 13 ) coarser than those on labrum. Frontoclypeal suture indistinct. Punctures slightly denser on frons than on clypeus. Eyes slightly protruding. Mentum transverse, ca. 2 × as wide as long, with fine punctures, shagreened, without impression; anterior margin of mentum as wide as posterior margin, truncate ( Fig. 61 ). Labial palpomere 3 asymmetrical, as long as the penultimate. Maxillary palpomere 4 ca. 2 × as long as palpomere 3. Antenna with nine antennomeres, club almost as long as antennomeres 2 to 6 combined ( Fig. 62 ). Gula narrow, subparallel, gular suture slightly curved medially. Thorax. Pronotum evenly convex, without impressions and systematic punctures ( Fig. 13 ); ground punctures on pronotum sparser than those on frons mesally, denser and coarser laterally than mesally; intervals smooth, microsculpture absent. Lateral and anterior margins of pronotum weakly beaded ( Fig. 12, 17 ), anterior margin clearly bisinuate, posterior margin weakly bisinuate, lateral margin evenly curved. Elytra attenuating posteriorly, systematic punctures absent. Ground punctures on elytra rather coarse; ten rows of large serial punctures present posteriorly ( Fig. 10 ), lateral two rows strongly impressed, reaching anterior quarter ( Fig. 12 ). Sutural stria almost reaching anterior quarter, deeply impressed ( Fig. 10 ). Prosternum flat ( Fig. 14 ), anterior margin broadly protruding. Mesoventrite flat. Metaventrite covered with distinctly pubescence, bulging medially, with a small glabrous area ( Fig. 15 ). Meso- and metafemoral pubescence on basal four-fifth ( Figs. 11, 15, 16 , 60 ). Abdomen. Abdominal ventrites densely pubescent. First ventrite not carinate. Apical margin of fifth ventrite rounded ( Fig. 16 ). Aedeagus. Paramere with outer margin deeply incised subbasally, then inflated apical to incision; apex weakly projecting laterally. Median lobe rounded apically, apex situated in ca. apical ninth of paramere ( Fig. 51 ). Manubrium long, apex rounded. Etymology. This species is named after professor Ge-qiu Liang, a retired orthopterist at Sun Yat-sen University. He was the first author’s (FJ) supervisor when FJ worked for his Master’s degree twenty-five years ago. Biology. Aquatic. The type locality is a small pond with some grass in it and covered with some bamboo leaves; the pond is surrounded by bamboo ( Fig. 74 ). Distribution. China ( Yunnan , Sichuan ).