| Main Ref. | Stein, D.L., 1978 |
| 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 |
Pectoral fin deeply notched; disk minute, almost on symphysis of lower pectoral lobes, no evidence of any bony structure (Ref. 26773). Skin colorless, with scattered melanophores posteriorly; body pale, with melanophores absent on head, denser on dorsal and anal fin bases; mouth pale; branchial cavity, peritoneum, and stomach black; pyloric caeca pale; branchial and peritoneal color plainly visible through sides of body (Ref. 26773). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| 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 | 55 - 60 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 49 - 55 |
| Adipose fin | absent |
| Attributes | other (see remark) |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 45 - 50 |
| Pectoral | Attributes other (see diagnosis) |
| Spines 0 | |
| Soft-rays 27 - 29 | |
| Pelvics | Attributes part of sucker-disc |
| Position | |
| Spines 0 | |
| Soft-rays 0 - 0 |