Percultisphaera |
Percultisphaera
|
Nd |
Nd |
|
Percultisphaera |
Percultisphaera ledburica
|
Nd |
Ludlovian |
|
Percultisphaera |
Percultisphaera pilosa
|
Nd |
Wenlockian |
|
Percultisphaera |
Percultisphaera stiphrospinata
|
Nd |
Ludlovian |
Downtonian |
Peregrinixia |
Peregrinixia
|
Nd |
Nd |
|
Peregrinixia |
Peregrinixia radiata
|
Nd |
Vraconian |
|
Perforela |
Perforela
|
Nd |
Nd |
|
Perforela |
Perforela perforata
|
Nd |
Ludlovian |
|
Perisaccus |
Perisaccus
|
Nd |
Nd |
|
Perisaccus |
Perisaccus primigenus
|
Nd |
Ordovician |
|
Perissolagonella |
Perissolagonella
|
Nd |
Nd |
|
Perissolagonella |
Perissolagonella amsdenii
|
Nd |
Late Gedinnian |
|
Pertusisphaeridium |
Pertusisphaeridium
|
Nd |
Nd |
|
Pertusisphaeridium |
Pertusisphaeridium dispar
|
Nd |
Frasnian |
|
Petaloferidium |
Petaloferidium
|
Nd |
Nd |
|
Petaloferidium |
Petaloferidium comptum
|
Nd |
Arenigian |
Llanvirnian |
Petaloferidium |
Petaloferidium florigerum
|
Czechoslovakia |
Early Llanvirnian |
|