| Main Ref. | Mecklenburg, C.W., T.A. Mecklenburg and L.K. Thorsteinson, 2002 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
No bony conical tubercles or spiny plates; skin with low bumps and leathery tubercles lacking subdermal bony plates on head and body, including top of head, chin, throat, pectoral fin base. First dorsal fin overgrown with skin (Ref. 43939). |
| 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 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 6 - 6 |
| Soft-rays total | 12 - 12 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 10 - 10 |
| Pectoral | Attributes very large , lobe-like |
| Spines 0 | |
| Soft-rays 27 - 27 | |
| Pelvics | Attributes part of sucker-disc |
| Position | |
| Spines | |
| Soft-rays |