| Main Ref. | Zuanon, J. and I. Sazima, 2002 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | oval |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | cycloid and ctenoid scales |
| Diagnosis |
Slender-bodied (body depth 10.5-13.9% SL), with continuous lateral line and 113-129 longitudinal scales. Compared to other congeners, orbital diameter smaller (5.7-7.6%SL versus 7.3-10.6); caudal peduncle depth lower (7.2-8.2% SL versus 8.8-10.4). Ctenoid scales restricted to posterior quarter of the body. Caudal fin rounded. Pectoral fin nearly symmetrical, 8th ray longest, with lower edge slightly thickened (Ref. 46528). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 38 - 41 |
| Pored lateral line scales | |
| Scales in lateral series | 113 - 129 |
| 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 | 16 - 16 |
| total | 33 - 33 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 18 - 20 |
| Soft-rays total | 9 - 11 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 3 - 3 |
| Soft-rays total | 8 - 9 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes other (see remarks) |
| Position thoracic behind origin of D1 | |
| Spines | |
| Soft-rays |