| Main Ref. | Bigorne, R., 1990 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | no special organs |
| Different appearance | males alike females |
| Different colors | males alike females |
| Remarks | Base of anal fin rays in adult males greatly expanded with thin sheets of bone (Ref. 27585). |
| Striking features | none |
| Body shape lateral | fusiform / normal |
| Cross section | compressed |
| Dorsal head profile | clearly convex |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | sub-terminal/inferior |
| Type of scales | cycloid scales |
| Diagnosis |
Body depth 4.2-5.0 x SL. Eye small, 6.4-8.3 x head length. Head length 4.5-5.3 x SL. Dorsal fin base 5.8-7.0 x SL, origin behind origin of anal fin. Dorsal base to anal base ratio 0.7-0.9. Pectoral shorter than head, 1.4-1.7 x pelvic fin length. Clear brown color. |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 58 - 68 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 8 - 10 |
| Scale rows below lateral line | 10 - 12 |
| Scales around caudal peduncle | 12 - 12 |
| Barbels | 0 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 0 - 0 |
| Soft-rays total | 17 - 18 |
| Adipose fin | absent |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 22 - 25 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays |