Crenitis (Crenitis) lianggeqiui Jia, Tang & Minoshima, 2016, sp. nov.
Creators: name: Jia, Fenglong
name: Tang, Yudan
name: Minoshima, Yûsuke N.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydrophilidae
Crenitis
Crenitis lianggeqiui

description: 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.
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).
description: Published as part of Jia, Fenglong, Tang, Yudan & Minoshima, Yûsuke N., 2016, Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae), pp. 561-576 in Zootaxa 4208 (6) on pages 563-565, DOI: 10.11646/zootaxa.4208.6.4, http://zenodo.org/record/215062