| Main Ref. | Stehmann, M. and D.L. Bürkel, 1984 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | claspers (m) |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | other |
| Cross section | flattened |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | sub-terminal/inferior |
| Type of scales | placoid scales |
| Diagnosis |
Snout pronounced, rather pointed; disc rhomboid, with angled outer corners upper surface entirely spinulose, underside prickly on large areas; about 8 thorns usually in a complete row around inner margin of eye, small thorns on scapular, generally a row of about 50 thorns on each side of midline from shoulder to first dorsal fin; upper surface plain ashy-grey, underside white (Ref. 3167). |
| 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) | present |
| 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 | 0 - 0 |
| Soft-rays total | |
| Adipose fin | absent |
| Attributes |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 0 - 0 |
| Pectoral | Attributes transformed to 'aerofoils' |
| Spines 0 | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines 0 | |
| Soft-rays |