| Main Ref. | Stevenson, D.E. and M.E. Anderson, 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | eel-like |
| 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 | |
| Diagnosi |
Diagnosis: Vertebrae 17 - 19 + 90 - 98 = 108 - 116. Pectoral fin rays 12 - 15. Vomerine teeth 0 - 3. Gill rakers moderately long, 23 - 27. Short snout, less than eye-diameter. Median occipital pore present. Lateral line is not visible on the body. Interior of mouth darkly pigmented (Ref. 56148). |
| 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 | 17 - 21 |
| on upper limb | 5 - 7 |
| totale | 23 - 27 |
| Vertebre | |
| preanal | 17 - 19 |
| totale | 108 - 116 |
| Attributes | continuous with caudal fin |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 103 - 112 |
| Adipose fin |
| Attributes | pointed; confluent |
| Fins number | |
| Spines total | |
| Soft-rays total | 89 - 99 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 12 - 15 |