Protosphaeridium |
Protosphaeridium discum
|
France |
Late Riphean |
|
Protosphaeridium |
Protosphaeridium discum
|
Spain |
Early Riphean |
|
Protosphaeridium |
Protosphaeridium flexuosum
|
Morocco |
Early Riphean |
Middle Riphean |
Protosphaeridium |
Protosphaeridium flexuosum
|
France |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium flexuosum
|
England |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium laccatum
|
Morocco |
Middle Riphean |
Late Riphean |
Protosphaeridium |
Protosphaeridium laccatum
|
Canada(Newfoundland) |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium laccatum
|
England |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium planum
|
Morocco |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium pusillum
|
Morocco |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium rigidulum
|
France |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium rigidulum
|
England |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium scabridum
|
Morocco |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium scabridum
|
England |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium sp
|
France |
Early Riphean |
Middle Riphean |
Protosphaeridium |
Protosphaeridium sp
|
England |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium sp
|
Spain |
Middle Riphean |
|