| Main Ref. | Conand, C., 1998 |
| Appearance refers to |
| specialized organs | |
| different appearance | |
| different colors | |
| remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Diagnosis | Mean live weight, 300 to 800 g; body thickness 0.4 cm. Body cylindrical, flattened ventrally (trivium). Bivium smooth and rigid. Podia on bivium long, slender, conical, and irregularly arranged; podia on trivium more numerous, shorter and irregularly arranged on the radii and interradii; calcareous disc of podia around 400 micrometer in diameter. Mouth ventral, surrounded by 20 short tentacles. Anus nearly dorsal, surrounded by 5 groups of radial papillae. Calcareous ring with large radial pieces and narrow interradials having sharp tops. Cuvierian tubules long and large. Variable color among specimens and localities; bivium beige to light brown, showing characteristic brown spots; trivium lighter, yellowish. Spicules on ventral tegument with simple nodules with or without holes and sparse rods giving rise to rosettes; dorsal tegument with rosettes and small biscuit-like plates; ventral podia with variable rods; dorsal podia with x-shaped rods; tops of tentacles with spiny rods. |
| 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 | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes |
| spines | |
| soft-rays | |
| Pelvics | Attributes |
| Position | |
| spines | |
| soft-rays |