| Main Ref. | Chen, X.Y. and J.X. Yang, 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | sub-terminal/inferior |
| Type of scales | scales embedded or partly/completely absent |
| Diagnosis |
Distinguished from other members of the genus by having the following combination of characters: eyes vestigial; dorsal-fin with 9 branched rays; pectoral fin with 12 branched rays; pelvic fin with 7 branched rays; anal fin with 6 branched rays; caudal fin with 7+7 branched rays; distal margin of dorsal fin concave; tip of pelvic fin surpasses vertical level of anus; caudal fin deeply forked; whole body scaleless and colorless (Ref. 57680). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | 6 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 12 - 12 |
| Adipose fin |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 9 - 9 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 13 - 13 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 8 - 8 |