| Main Ref. | Myers, R.F., 1991 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Characterized by uniform black color of head, body and fins; ctenoid scales except cycloid on abdomen; head and nape without scales, presence of bristle-like papillae; complete pelvic fin frenum and basal membrane; longitudinal scale series 22-27; depth of body at level of pelvic fins 3.0-3.1 in SL (Ref. 90102). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 23 - 24 |
| 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 | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 7 - 7 |
| Soft-rays total | 8 - 9 |
| Adipose fin | absent |
| Attributes |
| Fins number | 1 |
| Spines total | 1 - 1 |
| Soft-rays total | 8 - 9 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 20 - 21 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |