| Main Ref. | Iwamoto, T. and Y.I. Sazonov, 1988 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | more or less straight |
| Type of eyes | |
| Type of mouth/snout | more or less normal |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Broad snout, rounded, naked but for 2 spiny tubercular scales at lateral angles; small coarse scales in a series along the posterior part of the median nasal ridge; a wedge of small scales intruding forward from the interorbital region on each side of median ridge. Prominent naked margins on head bones. Reduced spinules on scales, absent along the outer margins, about 8-12 subparallel ridges, few with sharp spinules. Internasal width about 5 in head, interorbital about 4, slightly greater than orbit diameter; small barbel, about 0.5 or less into orbit; upper jaw 36-39% head length. 1D. II,8-10 (Ref. 11650). |
| 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 | 2 - 2 |
| Soft-rays total | 8 - 10 |
| Adipose fin | absent |
| Attributes | pointed; confluent |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes used for locomotion |
| Spines 0 | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position thoracic behind origin of D1 | |
| Spines 0 | |
| Soft-rays 9 - 10 |