[=Helikodiadema Gregory, 1896, p. 121 (objective) ]
Diagnostic Features |
|
---|---|
Distribution | Late Cretaceous (Santonian) of the UK ?Maastrichtian and Danian of western Europe. |
Name gender | neuter |
Type | Pseudodiadema fragile Wiltshire, in Wright, 1882, by original designation. |
Species Included |
|
Classification and/or Status |
|
Remarks |
|