Florisphaeridium |
Florisphaeridium pequenisimum
|
Nd |
Ludlovian |
Pridolian |
Florisphaeridium |
Florisphaeridium prismaticum
|
Nd |
Ludlovian |
Gedinnian |
Florisphaeridium |
Florisphaeridium toyetae
|
Nd |
Middle Siegenian |
Emsian |
Florisphaeridium |
Florisphaeridium wenlockense
|
Nd |
Wenlockian |
|
Focusphaera |
Focusphaera
|
Nd |
Nd |
|
Focusphaera |
Focusphaera elongata
|
Nd |
Arenigian |
Llanvirnian |
Foliomorpha |
Foliomorpha
|
Nd |
Nd |
|
Foliomorpha |
Foliomorpha disciformis
|
Nd |
Middle Proterozoic |
|
Foliomorpha |
Foliomorpha involuta
|
Nd |
Middle Proterozoic |
|
Foliomorpha |
Foliomorpha platytaenia
|
Nd |
Middle Proterozoic |
|
Foveofusa |
Foveofusa
|
Nd |
Nd |
|
Foveofusa |
Foveofusa attenuata
|
Nd |
Early Permian |
|
Foveofusa |
Foveofusa cylindrica
|
Nd |
Early Permian |
|
Foveofusa |
Foveofusa mutabilis
|
Nd |
Early Permian |
|
Foveofusa |
Foveofusa obesa
|
Nd |
Early Permian |
|
Foveofusa |
Foveofusa perforata
|
Nd |
Early Permian |
|
Foveofusa |
Foveofusa pumila
|
Nd |
Early Permian |
|