| Main Ref. | Stein, D.L., N.V. Chernova and A.P. Andriashev, 2001 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | more or less normal |
| Type of mouth/snout | |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
Caudal-fin rays 8; pectoral girdle with 4 round radials; lateral profile of chin right-angled; chin with thick gelatinous layer, pores protected by anterior skin fold; upper lip wide posteriorly, entirely covering lower lip fold; eye comparatively small, 21% HL, interorbital broad, 44%; lower end of gill opening and uppermost pectoral ray level with lower margin of eye; pectoral rudimentary rays absent; HL 19.3% SL; preanal 35% SL; vertical fins overlapping caudal fin slightly more than half; females with prominent genital papilla; color dark blackish-brown, peritoneum black, tongue grey-dotted (Ref. 42734). |
| 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 | 66 - 66 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 59 - 59 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 53 - 53 |
| Pectoral | Attributes other (see remarks) |
| Spines 0 | |
| Soft-rays 21 - 21 | |
| Pelvics | Attributes suppressed/absent |
| Position absent | |
| Spines 0 | |
| Soft-rays 0 - 0 |