Parachironomus gracilior (Kieffer)

Yan, Chun-Cai, Yan, Jiao, Jiang, Li, Guo, Qin, Liu, Ting, Ge, Xin-yu, Wang, Xin-Hua & Pan, Bao-ping, 2015, Parachironomus Lenz from China and Japan (Diptera, Chironomidae), ZooKeys 494, pp. 31-50 : 34-36

Taxon classification Animalia Diptera Chironomidae

Parachironomus gracilior (Kieffer) Figs 5-7

Chironomus gracilior Kieffer, 1918: 49. - Goetghebuer (1921a: 42, 163).

Cryptochironomus arcuatus Goetghebuer, 1919: 66. - Wang et al. (1977: 230).

Tendipes (Parachironomus) monotomus (Kieffer). - Kruseman (1933: 193).

Tendipes (Parachironomus) arcuatus (Goetghebuer). - Kruseman (1933: 194).

Tendipes (Cryptochironomus) arcuatus (Goetghebuer). - Goetghebuer (1937 in 1937-1954: 43).

Parachironomus gracilior (Kieffer). - Lenz (1938: 711).

Parachironomus arcuatus (Goetghebuer). - Brundin (1947: 56); Lehmann (1970: 135); Pinder (1978: 132); Sasa (1985: 108); Sasa and Kawai (1987: 20); Sasa (1988: 56; 1989: 23, 849); Sasa and Kikuchi (1995: 102); Sasa (1996: 95; 1998: 30); Wang (2000: 645); Özkan (2002: 186); Wang and Ji (2003: 61); Makarchenko et al. (2005: 410).

Material examined.

CHINA: 9 males, Tianjin City, Campus of Nankai University, 9 males, 12, 16. iv. 1985; 15. v. 1985; 20. iv. 1986, X. Wang; 1 male, Tianjin City, Shuanglin Farm, 20. vi. 1985, X. Wang; 1 male, Hebei Province, Qinhuangdao City, 1 male, vi. 1985, X. Wang; Hebei Province, Chicheng County, Yunzhou Reservoir, 21. vii. 2001, sweep net, Y. Guo and Y. Du. 1 male, Neimenggu Autonomous Region, Wuliangsuhai Lake, v. 1982, X. Wang; 1 male, Neimenggu Autonomous Region, Alashan League, Bayin, 30. vii. 1987, X. Wang; 1 male, Liaoning Province, Shenyang City, 27. viii. 1990, J. Wang; 1 male, Jiangxi Province, Poyanghu Lake, Nanjishan, 12. vi. 2004, Sweep net, C. Yan. 1 male, Yunnan Province, Kunming City, Dianchi Lake, 23. v. 1986, X. Wang; 1 male, Yunnan Province, Lijiang City, School of Agriculture Reservoir, 2400 m a.s.l., 28. v. 1996, X. Wang.

Diagnostic characters.

The species can be identified by the following combination of characters: anal point moderately narrow; frontal tubercles present; superior volsella bearing two apical setae, short cylindrical, often appearing more or less contracted, and with folds on inner margin; gonostylus with constriction at approximately mid-length.

Distribution.

The species is widely distributed in the Palaearctic and extends into the Oriental Region ( Sæther and Spies 2013). It occurs in China and Japan.

Remarks.

The synonymy between Parachironomus gracilior and Parachironomus arcuatus was accepted in the past already (e.g. by Goetghebuer 1921a, Lenz 1938); thus we do not present it as a 'new synonymy’ here. The holotype of Chironomus gracilior Kieffer (at SDEI) and non-type specimens identified as Tendipes monotomus by Kruseman (1933) have been examined by M. Spies, and found to be conspecific beyond any doubt (M. Spies, pers. comm.).