Oreonectes

Huang, Jin-Qing, Yang, Jian, Wu, Zhi-Qiang & Zhao, Ya-Hui, 2020, Oreonectes guilinensis (Teleostei, Cypriniformes, Nemacheilidae), a new loach species from Guangxi, China, Journal of Fish Biology 96 (1), pp. 111-119 : 118

4.1 | Key to species of Oreonectes

1. Eyes absent, branched pelvic-fin rays 4. ................... O. anophthalmus Eyes present, branched pelvic-fin rays 6 – 7..........................................2

2. Body pigment absent, caudal fin truncated.............. O. luochengensis

3. Body with pigments, caudal fin rounded.............................................. 4

4. Posterior chamber of air-bladder degenerated, dorsal fin placed far backwards, at some distance behind the root of ventrals...................................................................................... O. platycephalus

Posterior chamber of air-bladder developed, dorsal-fin origin vertical to the root of pelvic fin........................................................................5

5. Body without obvious speckles, hyaline on all fins.......................................................................................... O. guananensis

Body with many obviously speckles, dorsal fin and caudal fin with irregular black strips....................................................................................6

6. Maxillary barbel reaching the vertical of the pectoral-fin origin, W B 6.5% – 12.6% L S .................................................................... O. polystigmus

Maxillary barbel not reaching the vertical of the pectoral-fin origin, W B 14.0% – 16.7% L S .............................................. O. guilinensis sp. nov.