Cryptopleurum subtile Sharp, 1884

Jia, Fenglong & Zhang, Ruijuan, 2017, A review of the genus Cryptopleurum from China (Coleoptera: Hydrophilidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 577-592 : 581-582

Cryptopleurum subtile Sharp, 1884

( Figs 9‒16 )

Cryptopleurum subtile Sharp, 1884: 461 . Cryptopleurum subtile: HANSEN (1999: 310) : catalogue, complete synonymy.

Type locality. Japan: Hokkaido Is., Otaru.

Material examined. CHINA: NEI MONGOL: 2 spec. ( SYSU): Hailar City , 49º12′36ʺN, 119º44′24ʺE, 23‒26. vii.2003, Fenglong Jia lgt . QINGHAI: 1 spec. ( SHNU): Beishan, Huzhu Co., Xining City , alt. 2450 m, 36º50′24ʺN, 101º57′36ʺE, 28.vii.2004, Tang & Hu & Zhu lgt. (transcribed from Chinese) . BEIJING: 1 spec. ( BMHM): CHINA, b.m. 1980‒491, P.M. Hammond, PEIKING, Badaling , 40º21′36ʺN, 116º01′12ʺE, 9.ix.[19]80, Cryptopleurum subtile Sharp , det. Ryndevich S.K., 2007 . HEBEI: 96 spec. ( SYSU): Handan, City, Piancheng , County , 36º4′02ʺN, 113º39′30ʺE, 1109 m, 1.viii.2013, Xie & Lin lgt. (with English and Chinese labels) . SHANXI: 20 spec. ( SYSU): Lishan, Nature Reserve , Yicheng County, Douduo village , 35º26′22ʺN, 112º00′36ʺE, 1558 m, 25.vii.2013, Jia, Xie & Lin lgt. (with English and Chinese labels) . SHAANXI: 6 spec. ( SYSU, SHNU): China, Shaanxi Prov. , Ankang City , Ningshaan County, Houditang , Foresty Centre , 33º26′N, 108º27′E, alt. 1500‒1700 m, 12.vii.2012, Li Li-zhen lgt . HUBEI: 39 spec. ( SYSU): Dabieshan Mts, Wujianshan , 31º7.6′N, 115º45.1′E, 29.vi.2009, light trap, Zhenhua Liu lgt. (transcribed from Chinese) . HUNAN: 5 spec. ( SYSU): Zhuzhou, Yanling County, Taoyuandong , Xihua village , 26º31′23ʺN, 114º05′75ʺE, 25.v.2014, Xiaolin Liu, Renchao Lin & Chang Pan lgt. (transcribed from Chinese) ; 5 spec. ( SYSU): Yanling County, Taoyuandong scenic area, service centre, 26º30′06ʺN, 114º00′53ʺE, 25.v.2014, Xiaolin Liu, Chang Pan & Weicai Xie lgt. (transcribed from Chinese) ; 1 male ( SYSU): Hunan, Qianban, Anjiang , 27º18′36ʺN, 110º08′24ʺE, 17.vi.1965, Zhenyao Chen lgt. (transcribed from Chinese) . GUIZHOU: 1 spec. ( SYSU): Guizhou Prov. Weng’ang, Town, Maolan Nature , Reserve. 814 m, 25º15′08ʺN, 107º53′56ʺE, 24.vii.2015, Renchao Lin & Yudan Tang lgt . SICHUAN: 7 spec. ( SYSU): Ya’an, Liziping Natural Reserve, Gongyihai Station , 2065 m, 29º01′32.14ʺN, 102º23′03.87ʺE, 24‒25.vii.2016, Yudan Tang & Ruijuan Zhang lgt. (transcribed from Chinese) ; 26 spec. ( SYSU): Ya’an, Liziping Natural Reserve, Menghuocheng , 2644m, 28º53′16.5ʺN, 102º21′21.26ʺE, 26.vii.2016, Yudan Tang & Ruijuan Zhang lgt.(transcribed from Chinese) . ZHEJIANG: 1 spec ( SHNU): Longwangshan N. R., Anji County, alt. 250 m, 30º24′36ʺN, 119º25′12ʺE, 26.iv.2006, Zhuling lgt .; 6 spec. ( SYSU): Tianmushan , 30º19′12ʺN, 119º25′48ʺE, 27.vii‒10.viii.2009, Fenglong Jia lgt. (transcribed from Chinese) . SHANGHAI: 2 spec. ( SHNU): Botanic Garden, Shanghai City , 31º23′48ʺN, 121º28′12ʺE, 16.iv.2006, Hu & Tang lgt . JIANGXI: 3 spec. ( SYSU): Jinggangshan, Jingzhushan scenic area, 26.54ºN 114.12ºE, 04.x.2010, Fenglong Jia lgt. (transcribed from Chinese) ; 8 spec. ( SYSU): CHINA: Jiangxi Prov., Jinggangshan Mts., Baiyinhu env., 26º36.8′N, 114º11.1′E, 800 m, Fenglong Jia lgt. (with English and Chinese labels) ; 14 spec. ( SYSU): Jinggangshan, Xiangzhou , 349 m, 26º36.0′N, 114º16.0′E, Lijun Yang lgt. (with English and Chinese labels) ; 3 spec. ( SYSU): same data as the former but collected by Fenglong Jia ; 1 spec. ( SYSU): Jinggangshan, Xiaoxidong , 26.48ºN 114.19ºE, 02.viii.2011, Lijun Yang lgt .; 1 spec. ( SYSU): Jiangxi, Shangrao, Sanqingshan , 28º54′36ʺN, 118º04′12ʺE, 15‒20.iv.2007, Fenglong Jia lgt. (transcribed from Chinese) ; 1 spec. ( SYSU): China, Jiangxi, Sanqingshan , 28.93ºN 118.05ºE, Living lgt .; 3 spec. ( SYSU): Jiangxi Prov. Ji’an City, Anfu, County , Wugongshan , 27.19ºN 114.13ºE, 400 m, 5.viii.2015, Renchao Lin & Yudan Tang lgt .; 2 male, 11 spec. ( NMPC): Jinggangshan Mts., Xiangzhou (forest valley S of the village), 26.58ºN 114.27ºE, 374 m, 26. iv. 2011, Fikáček & Hájek lgt . FUJIAN: 1 male ( SYSU): Fujian, Nanjing, Hexi town , (cow dung), 24.65ºN 117.05ºE, 13.vii.2010, Fenglong Jia lgt. (transcribed from Chinese) . GUANGDONG: 5 spec. ( SYSU): Guangdong, Xingning, Luofu-Huangmaozhang Nature Reserve , 23.25ºN 114.03ºE, 02.vii.2004, Fenglong Jia lgt. (transcribed from Chinese) ; 1 spec. ( SYSU): Guangzhou, Shipai , 23.13ºN 113.26ºE, 18.x.1964, Zhaojian Liang lgt. (transcribed from Chinese) ; 4 spec. ( SYSU): Guangdong, Fengkai, Heishiding , 23.46ºN 111.90ºE, 05.x.2011, Living lgt. (transcribed from Chinese) ; 2 spec. ( SYSU), Guangdong, Gaoming, Yangmei town , 23.62ºN 113.42ºE, 23‒26.iv.2006, Fenglong Jia lgt. (transcribed from Chinese) ; 1 spec. ( SYSU), Guangdong, Puning , 23.30ºN 116.16ºE, 3.i.1959, Zhelong Pu lgt. (transcribed from Chinese) ; 1 spec. ( SYSU), Guangdong, Dadongshan , 24.84ºN 112.52ºE, 28.vi.2011, Living lgt . GUANGXI: 1 spec. ( SYSU): Guangxi, Yangshuo , 24.82ºN 111.26ºE, 1958, Shoujian Chen lgt. (transcribed from Chinese) . YUNNAN: 1 spec. ( SYSU): Yingjiang County, Tongbiguan, Kaibangya lake , 24.58ºN 97.67ºE, 1289m, 25.v.2016, Yudan Tang & Ruijuan Zhang lgt. (transcribed from Chinese) ; 1 spec. ( NMPC): Gaoligong Mts. NNR. Baihualing , 25.26ºN 98.80ºE, at light 1535 m, 6‒8.vi.2016, Hájek & Růžička lgt . JAPAN: 1 spec. ( SYSU): Japan, Hokkaido, Hokodate , 41.77ºN 140.73ºE, viii.2003, F.L. Jia lgt .; 1 male ( SYSU): Naga-Numa, Shika-Numa, Atsuma , Hokkaido Japan , 42.72ºN 141.88ºE, 12.vi.1994, M. Ohara, (decaying vegetable) ; 2 spec. ( SYSU): Ishigaki-jima, Nansei, Iss. , Japan. 42.83ºN 143.36ºE, 4.ii.1996, K. Tokahashi, collected by Track trap ; 1 spec. ( SYSU): Otaru (Osyoro), Hokkaido , Japan , 43.22ºN 142.86ºE, 3.ix.1991, M. Ohara lgt .

Published records. CHINA: BEIJING, JIANGXI, TAIWAN, ZHEJIANG (without specified localities; FIKÁČEK et al. 2015a).

Redescription. Length 1.6–2.3 mm. Yellowish red to reddish brown with black head and sternites; head, pronotum, and metaventral elevation with distinct longitudinal microsculptural lines ( Fig. 16 ). Punctures on pronotum and elytral intervals fine and sparse. Elytral striae seven and eight more or less fused but series of punctures distinctly separated ( Fig. 12 ), intervals flat basally but somewhat convex apically and laterally ( Figs 9, 11 ). Paramere ( Figs 13, 14 ) ca. 1.25× as long as phallobase, gradually narrowed from base to middle, almost parallel from middle to subapex, distinctly expanded outwards, with membrane and setae subapically inwards. Median lobe broad, almost parallel at basal four-fifth, abruptly narrowed at apical fifth and gradually narrowed apicad, gonopore situated subapically.

Differential diagnosis. This species is similar to C. minutum , but it can be easily distinguished from the latter by its light color, and the pronotum, elytra and metaventrite with finer and moderately dense punctures. The head, and disc of the pronotum and metaventrite have distinct short longitudinal microsculpture between punctures.

Biology. Living in decaying organic material, particularly in compost heaps, barn manure, excrements of mammals (e.g. horse and cattle dung), among various plant debris, also in nests of birds ( RYNDEVICH & LUNDYSHEV 2005). This species can be easily collected at light from April to November in South China.

Distribution. Widespread in Eastern Palearctic and China, in early 20th century introduced to North America, and in 1960ʼs to Europe ( SMETANA 1978, HANSEN 1999). In China previously recorded from Beijing, Jiangxi, Taiwan and Zhejiang. Newly recorded for Fujian, Guangdong, Guangxi, Guizhou, Hebei, Hubei, Hunan, Nei Mongol, Qinghai, Shaanxi, Shanghai, Shanxi, Sichuan, Yunnan.

Figures

Figs 9–16. Cryptopleurum subtile Sharp, 1844. 9–11 – habitus (9 – dorsal; 10 – ventral; 11 – lateral view). 12 – dorsolateral part of left elytron (A – eighth stria; B – seventh stria). 13–14 – aedeagus (13 – dorsal; 14 – ventral view). 15 – metaventrite. 16 – pronotal punctation.