| Main Ref. | De Vos, L., 2003 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Diagnosis |
Diagnosis: dorsal fin absent; adipose fin always present; pectoral-fin spine variably denticulate; 60-78 soft rays in anal fin (Ref. 57127). Coloration: in life: body translucent, sometimes covered with small black dots (Ref. 57127). Preserved specimens: body whitish-beige, sometimes with small spots of pigment along lateral line and anal-fin base, as well as on head and back (Ref. 57127). |
| 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 | 8 |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 22 - 26 |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | greatly reduced or absent |
| Fins number | |
| Finlets No. | Dorsal 0 |
| Ventral 0 | |
| Spines total | 0 |
| Soft-rays total | 0 |
| Adipose fin | present |
| Attributes | forked; more or less normal |
| Fins number | 1 |
| Spines total | 0 |
| Soft-rays total | 60 - 78 |
| Pectoral | Attributes more or less normal |
| Spines 1 | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal | |
| Spines | |
| Soft-rays |