Protosphaeridium |
Protosphaeridium densum
|
Nd |
Vendian |
|
Protosphaeridium |
Protosphaeridium flexuosum
|
Nd |
Vendian |
|
Protosphaeridium |
Protosphaeridium fuscipetiolatum
|
Morocco |
Early Arenigian |
|
Protosphaeridium |
Protosphaeridium gibberosum
|
Nd |
Late Precambrian |
|
Protosphaeridium |
Protosphaeridium gracile
|
USSR(Baltic) |
Early Gothlandian |
|
Protosphaeridium |
Protosphaeridium granuliferum
|
India(Karnataka) |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium intertextum
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium kerianum
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium laccatum
|
Norway |
Vendian |
|
Protosphaeridium |
Protosphaeridium muirii
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium paleaceum
|
Nd |
Vendian |
|
Protosphaeridium |
Protosphaeridium papyraceum
|
Nd |
Late Precambrian |
|
Protosphaeridium |
Protosphaeridium parvulum
|
Nd |
Late Cambrian |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR(Ukrainian SSR) |
Sinian |
|
Protosphaeridium |
Protosphaeridium petaliferum
|
Spain |
Middle Cambrian |
Late Cambrian |
Protosphaeridium |
Protosphaeridium petigenosum
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium punctatum
|
India(Karnataka) |
Middle Riphean |
Early Cambrian |