Poikilofusa |
Poikilofusa spinata
|
Nd |
Middle Ordovician |
|
Poikilofusa |
Poikilofusa squama
|
Nd |
Devonian |
|
Poikilofusa |
Poikilofusa striata
|
Canada(Quebec) |
Caradocian |
|
Poikilofusa |
Poikilofusa striatifera
|
Nd |
Early Gedinnian |
|
Poikilofusa |
Poikilofusa striatogranulata
|
Nd |
Late Ordovician |
|
Poikilofusa |
Poikilofusa syrdenospermatella
|
Nd |
Ashgillian |
|
Polonosphaeridium |
Polonosphaeridium
|
Nd |
Nd |
|
Polonosphaeridium |
Polonosphaeridium francinae
|
Nd |
Late Llanvirnian |
|
Polonosphaeridium |
Polonosphaeridium ordovicum
|
Nd |
Middle Ordovician |
|
Polyancistrodorus |
Polyancistrodorus
|
Nd |
Nd |
|
Polyancistrodorus |
Polyancistrodorus columbariferus
|
Nd |
Llandeilian |
|
Polyancistrodorus |
Polyancistrodorus intricatus
|
Nd |
Late Ordovician |
|
Polyancistrodorus |
Polyancistrodorus radiosus
|
Nd |
Arenigian |
|
Polyancistrodorus |
Polyancistrodorus taleatus
|
Nd |
Arenigian |
|
Polycavita |
Polycavita
|
Nd |
Nd |
|
Polycavita |
Polycavita concentrica
|
Nd |
Late Precambrian |
|
Polydeunffia |
Polydeunffia
|
Nd |
Nd |
|