| Main Ref. | Rainboth, W.J., 1996 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | more or less normal |
| Type of mouth/snout | other (see remarks) |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
No dorsal fin; deep body (3.8-4.0 times in SL); head 5.8-6.0 times in SL; jaws equal-sized; a single patch of vomerine teeth (Ref. 12693). Head depressed; snout bluntly rounded; eyes small, covered with sebaceous membrane; barbels 2 pairs (Ref. 45563). |
| 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 | 0 - 0 |
| Soft-rays total | 0 - 0 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | |
| Spines total | |
| Soft-rays total | 66 - 68 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal | |
| Spines | |
| Soft-rays 8 - 8 |