Main Ref. | Poutiers, J.M., 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 | Shell medium sized, solid, elongateovate in outline, not shouldered. Spire apex blunt, often corroded in mature specimens. Sculpture of numerous axial grooves and fine spiral lines, causing a finely latticed pattern throughout the surface of shell, though it is somewhat stronger on posterior half of body whorl than on anterior half. Periostracum tough, closely applied to shell. Outer lip of the aperture thick and smooth inside, with a low swelling at about the middle. Inner lip glazed, with 3 folds; posterior fold tooth-like, centre fold oblique, large and angular, anterior fold weak and almost axial in direction. Colour: outside of shell whitish under the dark brown periostracum. Aperture porcelaneous white. |
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 |