| Main Ref. | Wang, S. (ed.), 1998 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | more or less normal |
| Type of mouth/snout | tube-like |
| Position of mouth | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Posterior nostril barbels reaching rear edge of eyes, maxillary one nearly reaching pectoral fin, posterior barbels on chin reaching branchial membrane and anterior one short; gill opening large and branchial membrane free; skin naked. Last simple ray of pectoral fin hard and strongly serrated on hind margin; ventral fin nearly reaching anal fin and end of caudal fin lightly concave or truncate. |
| 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 | |
| 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 | 1 - 1 |
| Soft-rays total | 6 - 7 |
| Adipose fin |
| Attributes | other (see remark); more or less normal |
| Fins number | |
| Spines total | |
| Soft-rays total | 13 - 17 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |