Copelatus sociennus J. Balfour-Browne 1952
Creators: name: Jiang, Zhuo-Yin
name: Zhao, Shuang
name: Yang, Zhen-Yu
name: Jia, Feng-Long
name: Hájek, Jiří
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dytiscidae
Copelatus
Copelatus sociennus

description: Copelatus sociennus J. Balfour-Browne, 1952
(Figs 21, 59–60)
Copelatus sociennus J. Balfour-Browne in Guignot, 1952: 26; Jäch & Easton 1998: 44 (Macao: Friendship Monument). Copelatus bangalorensis Vazirani, 1970: 311; Zeng 1989: 98 (Guangxi: Guilin, Yanshan; Shanghai; Yunnan: Xishuangbanna).
Type locality. “ China: (Hong Kong)”.
Type material. Holotype ♂ (BMNH), labelled: “833 [hw, round label] // Hong Kong / [on reverse:] 48 / 60 [hw] // Copelatus / discoideus Shp [hw] // Copelatus / japonicus / ♂ Sharp. / det. J.Balfour-Browne [hw, blue ink] // Copelatus ♂ / chinensis Rég. [hw] / J.Balfour-Browne det. [p] / Det. from Descr. [p] ii.1946 [hw] // HOLOTYPE ♂ / COPELATUS / sociennus / J.Balfour-Browne, 1952 / labelled by J. Hájek 2016 [p, red label]”. Paratypes: 1 ♂ (BMNH), labelled: “Bowring / China [hw] // 457 / 17/8/49 [hw, round label] // Copelatus / japonicus / ♂ Sharp. / det. J.Balfour-Browne [hw, blue ink] // Copelatus ♂ / chinensis Rég. [hw] / J.Balfour-Browne det. [p] / Det.from Descr. [p] ii.1946 [hw]”; 1 ♂ (BMNH), labelled: “Bowring / China [hw] // 457 / 7/8/53 [hw, round label] // Copelatus /? chinensis Rég. [hw] / J.Balfour-Browne det. [p]”; 1 ♀ (BMNH), labelled: “Bowring / China [hw] // 457 / 9/6/52 [hw, round label]”. All paratypes provided with additional label “ PARATYPE ♂ [♀, respectively] / COPELATUS / sociennus / J.Balfour-Browne, 1952 / labelled by J. Hájek 2016 [p, red label]”.
Additional material examined. CHINA: Guangdong: 3 ♂, 3 ♀, Zhuhai, Hengqin Island, 10.vii.2006, F. Jia leg. (SYSU); 4 ♀, Zhuhai, Qi’ao Island, 13.-15.vii.2005, Y. Jia leg. (SYSU); 2 ♂, Zhuhai, back mountain of Sun Yat-Sen University, 5.-8.vii.2011, F. Jia leg. (SYSU). Guangxi: 6 ♂, 9 ♀, Jingxi, Bangliang Nature Reserve, 6.viii.2010, J. Huang leg. (SYSU); 1 ♂, Shiwandashan National Forest Park, 21°54.4′N 107°54.2′E, 300 m, pool, 5.-9.iv.2013, M. Fikáček, J. Hájek & J. Růžička leg. (NMPC); 1 ♂, Du’an County, Sanzhiyang Township, Keli vill., 24.vi.2013, Tian, Lin, Yin, Huang leg. (SYSU). Hainan: 1 ♂, 3 ♀, 6 km W Dongxing, 50 m, 25.i.1996, M. Jäch leg. (NHMW). Macao: 1 ♂, Coloane Isl., Siac Pai Van Agric. Park, 19.iii.1998, E. Easton leg. (NHMW); 1 ♀, Cotai Ecological Zone, 5.vii.2017, F. Jia leg. (SYSU); 1 ♂, Cotai Ecological Zone, 10.x.2020, F. Jia & W. Xie leg. (SYSU). Yunnan: 3 ♀, Xishuangbanna, xii.1985 (SYSU).
Diagnosis. Larger (TL: 5.2–6.1 mm), broadly oblong-oval species. Head dark brown, clypeus and anterior part of frons usually paler, reddish; pronotum dark brown, laterally broadly reddish; elytra dark brown, with broad, comblike shaped, basal orange band not reaching suture, band confluent with orange-brown lateral part of elytra usually laterally from stria 3, apical fifth of elytra orange-brown. Pronotum with short longitudinal strioles laterally. Each elytron with six complete discal striae and one submarginal stria: all striae beginning at base; stria 1 and 4 ending close to elytral apex; striae 2–3 and 5 ending subapically; stria 6 shortest, ending at apical fourth; submarginal stria long, beginning before elytral mid-length and ending at apical fourth (Fig. 21). Median lobe of aedeagus in lateral view sickle-shaped with apex slightly turned dorsally, near mid-length with broad spoon-like process on dorsal side and finger-like process on ventral side (Fig. 59). Parameres broad, ‘D’-shaped; apex short and broad; apical lobes long, club-shaped (Fig. 60). Female similar to male, microreticulation of dorsal side slightly more impressed.
Collection details. The single specimen from Shiwandashan (Guangxi) was collected in a small pool of artificial stream in the resort; specimens from Hainan were found in roadside rainwater ditches and small man-made ground water pool in rubber plantation (Jäch & Ji 1998).
Distribution. A species occurring in the Indian subcontinent (especially in the Himalayan Area), China and continental Southeast Asia. In China, it is recorded from southern and eastern part of the country (Guangxi, Hong Kong, Macao, Shanghai, Taiwan, Yunnan). First records from Guangdong and Hainan (Fig. 83).
description: Published as part of Jiang, Zhuo-Yin, Zhao, Shuang, Yang, Zhen-Yu, Jia, Feng-Long & Hájek, Jiří, 2022, A review of Copelatus Erichson, 1832 of Mainland China, with description of ten new species from the japonicus complex (Coleoptera: Dytiscidae: Copelatinae), pp. 251-295 in Zootaxa 5124 (3) on page 271, DOI: 10.11646/zootaxa.5124.3.1, http://zenodo.org/record/6410696