| Main Ref. | Meyer, M.K., 1993 |
| 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 |
Diagnosis: relatively deep-bodied species with a steep, straight forehead (Ref. 42983, 52307) and short snout (Ref. 52307). Very flat gibbosity, most pronounced in adult males; lower pharyngeal bone with 151 teeth (mean value); usually 5 broad gill rakers on lower limb of first arch (Ref. 42983). Description: sexes differ only in a somewhat larger adult male with more elongated rays in dorsal and anal fin and no (or only slightly developed) hump on its head (Ref. 52307). Coloration: both sexes dark gray, with 2 blackish stripes on body that join at caudal peduncle (Ref. 52307). |
| Ease of Identification |
| Lateral Lines | 2 Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 29 - 30 |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 12 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 4 - 6 |
| on upper limb | 0 - 0 |
| total | 4 - 6 |
| Vertebrae | |
| preanal | |
| total | 28 - 29 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 20 - 21 |
| Soft-rays total | 7 - 8 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 6 - 7 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 13 - 15 | |
| Pelvics | Attributes more or less normal |
| Position | |
| Spines 1 | |
| Soft-rays 5 - 5 |