| Main Ref. | Kullander, S.O., R. Britz and F. Fang, 2000 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | eel-like |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | scales embedded or partly/completely absent |
| Diagnosis |
Single bony element representing the premaxilla and maxilla in the upper jaw; dorsal fin rays 43-44; anal fin rays 45-46; and total vertebrae 73-74 |
| 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 | 73 - 74 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 43 - 44 |
| Adipose fin |
| Attributes | more or less truncate; confluent |
| Fins number | |
| Spines total | |
| Soft-rays total | 45 - 46 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 10 - 11 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |