Polysphaeridium |
Polysphaeridium subtile
|
Canada(Saskatchewan) |
Middle Campanian |
Maastrichtian |
Polysphaeridium |
Polysphaeridium subtile
|
Canada(Manitoba) |
Middle Campanian |
Maastrichtian |
Polysphaeridium |
Polysphaeridium subtile
|
Texas |
Late Austinian |
Tayloran |
Polysphaeridium |
Polysphaeridium subtile
|
Wyoming |
Campanian |
|
Pterodinium |
Pterodinium agadirense
|
Canada(Saskatchewan) |
Middle Campanian |
|
Pterodinium |
Pterodinium agadirense
|
Canada(Manitoba) |
Middle Campanian |
|
Pterodinium |
Pterodinium cingulatum
|
Canada(Saskatchewan) |
Middle Santonian |
Middle Campanian |
Pterodinium |
Pterodinium cingulatum
|
Canada(Manitoba) |
Middle Campanian |
Late Campanian |
Pterodinium |
Pterodinium cingulatum
|
Texas |
Late Austinian |
Tayloran |
Pterospermopsis |
Pterospermopsis australiensis
|
Canada(Saskatchewan) |
Middle Campanian |
|
Pterospermopsis |
Pterospermopsis australiensis
|
Texas |
Late Austinian |
|
Pterospermopsis |
Pterospermopsis australiensis
|
Wyoming |
Campanian |
|
Schizocystia |
Schizocystia laevigata
|
Canada(Saskatchewan) |
Middle Campanian |
|
Schizocystia |
Schizocystia laevigata
|
Canada(Manitoba) |
Middle Campanian |
|
Scuticabolus |
Scuticabolus lapidaris
|
Nd |
Nd |
|
Senoniasphaera |
Senoniasphaera protrusa
|
Texas |
Late Tayloran |
|
Senoniasphaera |
Senoniasphaera rotundata
|
Texas |
Late Austinian |
Tayloran |