| Main Ref. | Meléndez, C., R. and D.F. Markle, 1997 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Body deep; head large; caudal peduncle narrow; lower jaws included (overlapped by) upper jaws when mouth closed; interorbital very wide, 10.3-15.0% SL; barbel on chin very short, 0.3-1.0% SL; lining of mouth dark (Ref. 31160). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 12 - 12 |
| Scale rows below lateral line | 27 - 27 |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 17 - 20 |
| on upper limb | 6 - 8 |
| total | 23 - 28 |
| Vertebrae | |
| preanal | |
| total | 56 - 59 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 75 - 89 |
| Adipose fin | absent |
| Attributes | more or less truncate; asymmetric |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 73 - 84 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 23 - 29 | |
| Pelvics | Attributes rays very elongated |
| Position | |
| Spines 0 | |
| Soft-rays 5 - 5 |