Peteinosphaeridium |
Peteinosphaeridium
|
Nd |
Nd |
|
Poikilofusa |
Poikilofusa
|
Nd |
Nd |
|
Polyancistrodorus |
Polyancistrodorus
|
Nd |
Nd |
|
Polyedryxium |
Polyedryxium
|
Nd |
Nd |
|
Polyedryxium |
Polyedryxium ambitum
|
Ohio |
Givetian |
|
Priscogalea |
Priscogalea
|
Nd |
Nd |
|
Protoleiosphaeridium |
Protoleiosphaeridium
|
Nd |
Nd |
|
Pterosperma |
Pterosperma
|
Nd |
Nd |
|
Pterospermella |
Pterospermella
|
Canada(Nova Scotia) |
Llandoverian |
|
Pterospermopsimorpha |
Pterospermopsimorpha
|
Nd |
Nd |
|
Rhopaliophora |
Rhopaliophora
|
Nd |
Nd |
|
Salopidium |
Salopidium
|
Nd |
Nd |
|
Salopidium |
Salopidium granuliferum
|
Sweden(Gotland) |
Silurian |
|
Schismatosphaeridium |
Schismatosphaeridium algerense
|
Nd |
Nd |
|
Schismatosphaeridium |
Schismatosphaeridium perforatum
|
Nd |
Nd |
|
Schroederia |
Schroederia
|
Nd |
Nd |
|
Solisphaeridium |
Solisphaeridium
|
Nd |
Nd |
|