Labiobaetis atrebatinus orientalis ( Kluge, 1983 )

Shi, Weifang & Tong, Xiaoli, 2014, The genus Labiobaetis (Ephemeroptera: Baetidae) in China, with description of a new species, Zootaxa 3815 (3), pp. 397-408 : 401

Labiobaetis atrebatinus orientalis ( Kluge, 1983)

Baetis atrebatinus orientalis: Kluge, 1983: 62 ;

Baetis (Mullerbaetis) morus: Kang et al., 1994: 33 ;

Labiobaetis atrebatinus orientalis: Fujitani et al., 2005: 142

Specimens examined (in ethanol). CHINA, Shanxi Province: 41 nymphs, Jiaocheng City, Xihe Town (37.55°N, 111.97°E, alt. 866m), 5-viii-2004, coll. Han Cuixiang; Henan Province: 16 nymphs, Ruyang County, Baishuxincun (34.13°N, 112.41°E, alt. 324m), 17-xi-2006, coll. Tong Xiaoli & Li Binfeng; Hubei Province: 13 nymphs, Yunxian County, Lijiawan, Taohe River (33.05°N, 111.01°E, alt. 263m), 22-xi-2006, coll. Tong Xiaoli & Li Binfeng; 2 nymphs, Danjiangkou City, Liuliping, Guanshanhe River (32.53°N, 110.98°E, alt. 187m), 24-xi- 2006, coll. Tong Xiaoli & Li Binfeng; Hunan Province: Dongan County, Wujiaqiao Town, Wujiaqiao River, 27-i- 2002, coll. Wang Wenli; Zhejiang Province: 10 nymphs, Jinghua City, Caozai Town, Dafo Temple (29.25°N, 119.74°E, alt. 379m), 10-ii-2002, coll. Tong Xiaoli; Guizhou Province: 1 nymph on slide and 5 nymphs, Suiyang County, the Kuankuoshui National Nature Reserve (28.30°N, 107.28°E, alt. 937m), 26-iii-2012, coll. Shi Weifang; 12 nymphs, Daozhen County, Sanqiao Town, Chatianping (29.11°N, 107.45°E, alt. 1183m), 20-viii-2004, coll. Wang Jun; Guangdong Province: 38 nymphs, Guangzhou, Zengcheng, Paitan Bridge (23.51°N, 113.78°E, alt. 38m), 9-i-2008, coll. Wang Beixin & Zhang Bin; 2 nymphs on slides and 31 nymphs, Wengyuan County, Hengshishui River (24.29°N, 113.93°E, alt. 102m), 21-v-2011, coll. Shi Weifang; 6 nymphs, Shixing County, Luoba Town, Luobahe River (24.85°N, 114.22°E), 16-iii-2012, coll. Shi Weifang; 16 nymphs, Shixing County, Mashi (25.03°N, 114.15°E), 16-iii-2012, coll. Shi Weifang; Guangxi: 3 nymphs, Guilin City, the Lijiang River (25.09°N, 110.43°E, alt. 150m), 24-vii-2003, coll. Tong Xiaoli; 10 nymphs, Lechang City, Jiufeng Town, 2-viii- 2011, coll. Huimin Zhong; 1 nymph on slides and 2 nymphs, Jinxiu County, Dayaoshan National Nature Reserve (24.12°N, 110.21°E, alt. 779m), 26-xi-2011, coll. Shi Weifang; Hong Kong: 40 nymphs, Lam Tsuen River, near Tong Min Tsuen (22.45°N, 114.14°E, 43m), 21-v-1998, coll. Tong Xiaoli.

Distribution. China (Henan, Shanxi, Zhejiang, Hubei, Hunan, Guangxi, Guangdong, Guizhou, Hainan, Hong Kong, Taiwan), Japan, Korea, Russian Far East.

Remarks. L. atrebatinus orientalis was erected by Kluge (1983) from the Russian Far East based on imago specimens with abdominal terga II–VI white and transparent which can be distinguished from the European subspecies Labiobaetis atrebatinus atrebatinus . Fujitani et al. (2005) confirmed the distribution of this subspecies in Japan according to imagoes reared from nymphs, and synonymized the Taiwanese species L. morus (Kang & Chang) with L. atrebatinus orientalis . Unlike other Chinese Labiobaetis species, this species has a wider distribution range in China, and is very common in the streams with emergent or trailing marginal vegetation in moderately swift to fast-flowing current, but seldom found in large rivers.