Bulla | |
Lip | |
None | |
Rimmed | |
Umbilical teeth |
Angular | |
Conical | |
Globose | |
Hemispherical | |
Rhomboid | |
Spherical | |
Subglobose | |
Subquadrate |
Left | |
not applicable | |
Right |
Elongate | |
Equatorial | |
Extraumbilical | |
Infralaminal | |
Multiple pores/apertures | |
Spiroumbilical | |
Sutural | |
Umbilical |
Keeled | |
Rounded |
Microperforated | |
Normal perforated |
Circular | |
No | |
Thin | |
Triangular | |
Triradiate |
Planispiral | |
Spherical | |
Streptospiral | |
Trochospiral |
0.000 - 0.239 | |
0.240 - 0.500 | |
0.509 - 0.750 | |
0.759 - 1.000 | |
1.008 - 1.500 | |
1.508 - 5.000 |
Crystaline | |
Finely pustulose | |
Honeycombe | |
Medium | |
Pustulose | |
Rough | |
Smooth | |
Very smooth |