| Name | From | To | Age range |
|---|---|---|---|
| Xenascus | Hauterivian | Maastrichtian |
|
| Xenascus asperatus | Cretaceous | Turonian |
|
| Xenascus australensis | Hauterivian | Early Maastrichtian |
|
| Xenascus blastema | Cenomanian | Early Turonian |
|
| Xenascus ceratioides | Bathonian | Late Eocene |
|
| Xenascus dubius | Senonian | Senonian |
|
| Xenascus esbeckianus | Early Cenomanian | Early Campanian |
|
| Xenascus ghanaensis | Maestrichtian | Maestrichtian |
|
| Xenascus gochtii | Turonian | Maestrichtian |
|
| Xenascus perforatus | Cenomanian | Late Campanian |
|
| Xenascus plotei | Barremian | Maastrichtian |
|
| Xenascus sarjeantii | Late Albian | Late Eocene |
|
| Xenascus serpaglii | Senonian | Senonian |
|
| Xenascus sp | Middle Hauterivian | Late Eocene |
|
| Xenascus sp.A | Campanian | Early Danian |
|
| Xenascus sp.A Schi.,1992 | Early Coniacian | Middle Coniacian |
|
| Xenascus velimensis | Late Cenomanian | Early Turonian |
|