Bungona (Chopralla) fusina (Tong & Dudgeon, 2003)

Shi, Weifang & Tong, Xiaoli, 2019, Genus Bungona Harker, 1957 (Ephemeroptera: Baetidae) from China, with descriptions of three new species and a key to Oriental species, Zootaxa 4586 (3), pp. 571-585 : 581

Bungona (Chopralla) fusina (Tong & Dudgeon, 2003)

( Figs. 50–59 )

Chopralla fusina: Tong & Dudgeon, 2003: 17 .

Bungona (Centroptella) fusina: Salles, Gattolliat & Sartori, 2016: 104 .

Material examined (deposited in ethanol unless otherwise stated). Besides the material examined by Tong & Dudgeon (2003), the following additional specimens have been studied: CHINA. Guangdong: 1 nymph on slides and 1 nymph, Shixing County, Chebaling National Nature Reserve (21.70°N, 114.25°E, alt. 370m), 21.iv.2002, coll. Xiaoli Tong. Hainan: 9 nymphs, Changjiang County, Bawangling National Nature Reserve, Dongliu (19.12°N, 109.09°E, alt. 220m), 12.ix.2003, coll. Wenli Wang ; 10 nymphs, Baisha County, Yinggeling National Nature Reserve, Nandanxi Stream , 25.xi.2005, coll. Haiyuan Yao ; 1 nymph on slides and 13 nymphs, Baisha County, Yinggeling National Nature Reserve, Daoyin Protection Station (19.01°N, 109.36°E, alt. 640m), 5.xii.2005, coll. Haiyuan Yao ; 1 nymph on slides and 14 nymphs, Ledong County, Jianfengling National Nature Reserve (18.76°N, 108.89°E, alt. 800m), 28.xi.2011, coll. Weifang Shi.

Distribution and biology. China (Guangdong, Hainan, Hong Kong). This species is widespread in southern China in association with the stone surfaces in slow-flowing or lentic habitat of streams.

Comments. Described originally based on nymph and imago from Hong Kong in the genus Chopralla (Tong and Dudgeon 2003) , this species was moved to the subgenus Chopralla of Bungona by Salles et al. (2016). Bungona (Ch.) fusina appears to be closely related to B. (Ch.) colorata from Vietnam based on structure, however, the body colour pattern, in particular of pro- and mesonotum ( Figs 52, 59 ), is distinctly different from the latter. Furthermore, the following combination of characteristics also can be useful to distinguish them: (1) the prostheca of right mandible bifurcated and plumose ( Fig. 51 ) (vs. the right prostheca plumose but not bifurcated in B. colorata ); (2) tergites V–X with acute triangular spines on posterior margins ( Fig. 54 ) (vs. tergites IV–X with such spines in B. colorata ); (3) gill I less than 4 times as long as wide, and other gills relatively broad, much less than 2.5 times as long as wide) ( Figs 55–58 ) (vs. in B. colorata , gill I more than 5 times as long as wide and other gills narrow-elongate and at least 2.5 times as long as wide).

Figures

FIGURES 50–59. Nymph of Bungona (Chopralla) fusina Tong & Dudgeon (50) left mandible; (51) right mandible; (52) pro- and mesonotum; (53) claw; (54) abdominal terga V–X; (55–58) gills 1, 3, 5, 7; (59) habitus of female nymph (dorsal view).