Crenitis (Crenitis) lianggeqiui, Jia, Fenglong, Tang, Yudan & Minoshima, Yûsuke N., 2016

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), Zootaxa 4208 (6), pp. 561-576 : 563-565

publication ID

https://doi.org/ 10.11646/zootaxa.4208.6.4

publication LSID

lsid:zoobank.org:pub:9ED97579-934D-4156-9EDF-5465ED302326

DOI

https://doi.org/10.5281/zenodo.6084163

persistent identifier

https://treatment.plazi.org/id/03E7878B-FFD2-FFA4-D9A1-3968FD75BC36

treatment provided by

Plazi

scientific name

Crenitis (Crenitis) lianggeqiui
status

sp. nov.

Crenitis (Crenitis) lianggeqiui View in CoL sp. nov.

( Figs. 10–17 View FIGURES 10 – 17 , 51 View FIGURES 50 – 55 , 60–62 View FIGURES 56 – 62 , 74 View FIGURES 73 – 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 GoogleMaps : 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 View FIGURES 10 – 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 View FIGURES 10 – 17 ). Mesoventrite flat. Meso- and metafemora pubescent on basal four-fifths ( Fig. 60 View FIGURES 56 – 62 ). 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 View FIGURES 50 – 55 ).

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 View FIGURES 50 – 55 ), whereas that of C. obovata is situated in apical fourth ( Fig. 23 View FIGURES 18 – 23 ).

Description. Length 3.5–3.9 mm, width 2.1–2.4 mm. Body obovate, attenuating posteriorly, convex ( Fig. 10 View FIGURES 10 – 17 ). Color. Dorsal surface black to dark reddish brown, pronotum somewhat reddish brown, lateral margins of pronotum yellowish brown ( Fig. 13 View FIGURES 10 – 17 ). Maxillary and labial palps and antennae uniformly yellowish brown, with infuscate antennal club. Ventral surface dark reddish brown, legs usually dark brown ( Fig. 11 View FIGURES 10 – 17 ).

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 View FIGURES 10 – 17 ) 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 View FIGURES 56 – 62 ). 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 View FIGURES 56 – 62 ). Gula narrow, subparallel, gular suture slightly curved medially.

Thorax. Pronotum evenly convex, without impressions and systematic punctures ( Fig. 13 View FIGURES 10 – 17 ); 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 View FIGURES 10 – 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 View FIGURES 10 – 17 ), lateral two rows strongly impressed, reaching anterior quarter ( Fig. 12 View FIGURES 10 – 17 ). Sutural stria almost reaching anterior quarter, deeply impressed ( Fig. 10 View FIGURES 10 – 17 ). Prosternum flat ( Fig. 14 View FIGURES 10 – 17 ), anterior margin broadly protruding. Mesoventrite flat. Metaventrite covered with distinctly pubescence, bulging medially, with a small glabrous area ( Fig. 15 View FIGURES 10 – 17 ). Meso- and metafemoral pubescence on basal four-fifth ( Figs. 11, 15, 16 View FIGURES 10 – 17 , 60 View FIGURES 56 – 62 ).

Abdomen. Abdominal ventrites densely pubescent. First ventrite not carinate. Apical margin of fifth ventrite rounded ( Fig. 16 View FIGURES 10 – 17 ). 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 View FIGURES 50 – 55 ). 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 View FIGURES 73 – 74 ).

Distribution. China (Yunnan, Sichuan).

SYSU

National Sun Yat-Sen University, Department of Biological Sciences

KMNH

Kitakyushu Museum and Institute of Natural History

NMPC

National Museum Prague

NMW

Naturhistorisches Museum, Wien

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrophilidae

Genus

Crenitis

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