Genus Form x
- Species total:
- 3
- Age range:
- 100 - 82 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Form x sp.1 Marh.,1992 | Maastrichtian | Maastrichtian |
|
| Form x sp.1 Thom.,1969 | Cenomanian | Coniacian |
|
| Form x sp.2 Marh.,1992 | Maastrichtian | Maastrichtian |
|