Cybister chinensis Motschulsky, 1854

Jiang, Zhuo-Yin, Zhao, Shuang, Mai, Zu-Qi, Jia, Feng-Long & Hendrich, Lars, 2023, Review of the genus Cybister in China, with description of a new species from Guangdong (Coleoptera: Dytiscidae), Acta Entomologica Musei Nationalis Pragae 63 (1), pp. 75-102 : 77-79

publication ID	https://doi.org/10.37520/aemnp.2023.003
publication LSID	lsid:zoobank.org:pub:937DF12A-BC2F-4406-802F-63838312B0C1
persistent identifier	https://treatment.plazi.org/id/03975B72-FFC1-760D-95B2-CD6D55C7FF2F
treatment provided by	Felipe (2023-05-02 17:27:15, last updated 2023-05-02 17:36:15)
scientific name	Cybister chinensis Motschulsky, 1854
status

Treatment

Cybister chinensis Motschulsky, 1854 View in CoL View at ENA

( Figs 2A–E View Fig ; 18A–C View Fig ; 19A View Fig ; 20A View Fig )

Cybister chinensis Motschulsky, 1854: 44 View in CoL (orig. descr.).

Cybister japonicus Sharp, 1873: 45 View in CoL (orig. descr.), synonymy by ZAITZEV (1915): 284 and confirmed by NILSSON & PETROV (2007): 43; SHARP (1882):748 (Manchuria, Shandong, Taiwan);RḖGIMBART (1899): 348

(Manchuria, Taiwan); FENG (1932): 36 (Beijing, Fujian: Fuzhou and Xiamen, Guangdong, Hainan, Manchuria, Shandong:Yantai, Taiwan); FALKENSTRÖM (1936): 244 (Sichuan); FENG (1936): 13 (Liaoning: Shenyang, Shaanxi); GSCHWENDTNER (1938): 76 (Manchuria, Taiwan); BRINCK (1946): 151 (Heilongjiang, Liaoning); ZAITZEV (1972): 360 (Taiwan); ZHAO (1981): 110 (Fujian); ZENG (1989): 90 (NE China, Fujian, Guangdong, Hainan, Hebei, Ningxia: Yinchuan, Shandong, Taiwan); LI (1992): 36 (Jilin, Liaoning); MORI & KITAYAMA (1993): 145 (Taiwan).

Material examined. CHINA: GUANGDONG: 3 JJ, Canton, 1.–21.

iii.2001, L. Hojný leg. ( NMPC). NINGXIA: 1 ♀, Yinchuan, under light,

6.vi.1960 ( SYSU); 1 J, Yinchuan, under light, 15.vii.1962 ( SYSU); 1

J, Yinchuan, Gujiaqiao, 23.vi.2011 ( SYSU); 2 ♀♀, Yinchuan ( SYSU). TIANJIN: 1 ♀, Tsing tou, 17.viii.1933 ( SYSU); 1 J, Tientsin, 10.iv.1935 ( SYSU); 1♀, Tianjin, Balitai, 4.v.1955,Y.Y.Liu leg. ( SYSU). WITHOUT ඉRECISE DATA: 15 spec., donated by Xing-min Wang, purchased from market, without data ( SYSU); 1 J, China ( LHCM).

Diagnosis. TL 35–40 mm, elongate, oblong-oval ( Fig. 2A View Fig ). Head dark green, clypeus yellow. Pronotum and elytra dark green to black, with distinct yellow margins laterally. Ventral surface yellow; prosternal process, middle of metaventrite and metacoxae dark green; metacoxae and abdominal ventrites narrowly margined ( Fig. 2B View Fig ). Dorsal surface dimorphic: smooth with sparse fine punctures in male; in female with isolated short, irregular striae on pronotum, and with dense longitudinal striae of various lengths on elytra except at its apex. Prosternal process lanceolate, with distinct lateral bead, surface flat, apex pointed; lateral parts of metaventrite (ʻmetasternal wingsʼ) tongue-shaped, slender, not reaching lateral margins; metacoxal lines distinct, well impressed, nearly parallel medially, divergent anteriorly, along metacoxal lines with a row of punctures. Forelegs yellow, midlegs and hindlegs yellow to brown; protarsomeres 1–3 of male broadly expanded into a palette, with four rows of adhesive setae on their ventral side; metatarsal claws single in both sexes. Median lobe of aedeagus ʻCʼ- shaped in lateral view, moderately curved ( Fig. 2C View Fig ); ridged in middle in ventral view, lateral margin strongly curved near apex, apex obtuse-angled ( Fig. 2D View Fig ). Parameres moderately broad, strap-like apically ( Fig. 2E View Fig ).

Habitat. This species inhabits ponds, paddy fields and wetlands with aquatic plants ( MORI & KITAYAMA 1993); specimens from Shanxi were found in a natural lake ( Figs 18A–C View Fig ).

Distribution. China (Beijing, Fujian, Guangdong, Hainan, Hebei, Heilongjiang, Jilin, Liaoning, Ningxia, Sichuan, Shaanxi, Shandong, Shanxi, Taiwan, Tianjin) ( Fig. 20A View Fig ), Japan, North Korea, Russia, South Korea (RḖGIMBART 1899; ZIMMERMANN 1920; FENG 1932, 1933b;

GSCHWENDTNER 1938; ZAITZEV 1972; ZENG 1989; MORI & KITAYAMA 1993; NILSSON 1995; NILSSON & HáJEK 2022b).

References

AUBE C. 1838: Species general des hydrocanthares et gyriniens; pour faire suite au species general des coleopteres de la collection de M. le comte Dejean. Mequignon Pere et Fils, Paris, xvi + 804 pp.

BRINCK P. 1946: Waterbeetles from Manchuria. With some zoogeographical remarks. Opuscula Entomologica (Lund) 11: 146 - 156.

FALKENSTROM G. 1936: Halipliden, Dytisciden und Gyriniden aus West- und Zentral-China (Coleoptera). Lingnan Science Journal 15: 225 - 248.

FENG H. T. 1932: Aquatic insects of China. Article II. Catalogue of Chinese Dytiscidae. Peking Natural History Bulletin 7 (1932 - 1933): 17 - 37.

FENG H. T. 1933 b: Classification of Chinese Dytiscidae. Peking Natural History Bulletin 8 (1933 - 1934): 81 - 146 + 2 pls.

FENG H. T. 1936: Notes on some Dytiscidae from Musee Hoang Ho Pai Ho, Tientsin with descriptions of eleven new species. Peking Natural History Bulletin 11 (1936 - 37): 1 - 15.

GSCHWENDTNER L. 1938: Monographie der palaarktischen Dytisciden. IX. Dytiscinae. Koleopterologische Rundschau 24: 33 - 76.

LI J. 1992: The Coleoptera Fauna of Northeast China. Jilin Education Publishing House, Jilin, 205 pp.

MORI M. & KITAYAMA A. 1993: Dytiscoidea of Japan. Kankyo Kagaku, Toyonaka, 217 pp (in Japanese, with English book title).

MOTSCHULSKY V. DE 1854: Diagnoses de coleopteres nouveaux, trouves par M. M. Tatarinoff et Gaschkewitsch aux environs de Pekin. Etudes Entomologiques 2 (1853): 44 - 51.

NILSSON A. N. 1995: Noteridae and Dytiscidae: Annotated check list of the Noteridae and Dytiscidae of China (Coleoptera). Pp. 35 - 96. In: JACH M. A. & JI L. (eds): Water beetles of China, Vol. I. Zoologisch-Botanische Gesellschaft in Osterreich and Wiener Coleopterologenverein, Wien, 410 pp.

NILSSON A. N. & PETROV P. N. 2007: On the identity of Cybister chinensis Motschulsky, 1854 (Coleoptera: Dytiscidae). Koleopterologische Rundschau 77: 43 - 48.

NILSSON A. N. & HAJEK J. 2022 b: Catalogue of Palearctic Dytiscidae (Coleoptera). Version 1. I. 2022. Distributed as a PDF file via Internet. Available from: http: // www. waterbeetles. eu (accessed January 20, 2022)

SHARP D. 1873: The water beetles of Japan. Transactions of the Entomological Society of London 1873: 45 - 67.

SHARP D. 1882: On aquatic carnivorous Coleoptera or Dytiscidae. Scientific Transactions of the Royal Dublin Society, Series II 2: 179 - 1003 + pls 7 - 18.

ZAITZEV F. A. [Ph.] 1915: Les coleopteres aquatiques de la collection Motschulsky. I. Haliplidae, Dytiscidae, Gyrinidae. Ezegodnik Zoologich eskago Muzeya Akademii Nauk 20: 239 - 295.

ZAITZEV F. A. [Ph.] 1972: Fauna of the USSR. Coleoptera. Families: Amphizoidae, Hygrobiidae, Haliplidae, Dytiscidae, Gyrinidae. Israel Program for Scientific Translations, Jerusalem, 401 pp.

ZENG H. 1989: Classification of Dytiscidae (Insecta: Coleoptera) - A study of the collections of Dytiscidae from major museums in China. Unpublished PhD Thesis, Department of Biology, University of Sun Yat-sen University, Guangzhou, 152 pp (in Chinese with English abstract).

ZHAO X. 1981: An annotated checklist of insects heretofore recorded from Fujian Province. Fujian Science and Technology Press, Fuzhou, 2 + 2 + 658 pp (in Chinese with English summary).

ZIMMERMANN A. 1920: Pars 71. Dytiscidae, Haliplidae, Hygrobiidae, Amphizoidae. In: SCHENKLING S. (ed.): Coleopterorum Catalogus, Volumen IV. Junk, Berlin, 326 pp.

Figures

Fig. 2. Cybister chinensis Motschulsky, 1854 (J, Heihe, Heilongjiang). A – habitus in dorsal view; B – habitus in ventral view; C – median lobe of aedeagus in lateral view; D – median lobe of aedeagus in ventral view; E – paramere. Scale bars: 5.0 mm (A, B), 1.0 mm (C–E).

Fig. 18. Habitats of Cybister in China. A–C – lake, Shanxi (C. chinensis); D–E – lowland marsh, Shenzhen, Guangdong (C. rugosus, C. tripunctatus lateralis and C. sugillatus); F – temporary pond in a valley, Danxiashan Mt., Guangdong (C. tripunctatus lateralis and C. limbatus); G – natural pond, Lankeshan Mt., Zhejiang (C. rugosus and C. brevis); H – terraced fields pools, Lvchun County, Yunnan (C. convexus and C. sugillatus).

Fig. 19. Live specimens of Chinese Cybister. A – C. chinensis Motschulsky, 1854 (mating couple); B – C. lateralimarginalis torquatus (Fischer von Waldheim, 1829); C – C. rugosus (W. S. Macleay, 1825); D – C. tripunctatus lateralis (Fabricius, 1798); E – C. convexus Sharp, 1882; F – C. sugillatus Erichson, 1834.