Acanthodiacrodium |
Acanthodiacrodium abortivum
|
USSR(Leningrad) |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium ordinarium
|
USSR(Leningrad) |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium selectum
|
USSR(Leningrad) |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium sp
|
USSR(Ukrainian SSR) |
Precambriam |
|
Annulatopsophosphaera |
Annulatopsophosphaera interrupta
|
USSR(Vologda) |
Middle Ordovician |
|
Annulatopsophosphaera |
Annulatopsophosphaera sp
|
USSR(Vologda) |
Middle Ordovician |
|
Annulatopsophosphaera |
Annulatopsophosphaera spinosa
|
USSR(Vologda) |
Middle Ordovician |
|
Annulatopsophosphaera |
Annulatopsophosphaera tuberculata
|
USSR(Vologda) |
Middle Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cellulare
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium operculatum
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium solitare
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium sp
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium tener
|
USSR(Leningrad) |
Middle Cambrian |
|
Arctacellularia |
Arctacellularia
|
USSR(Khabarovsk Kray) |
Late Riphean |
|
Arctacellularia |
Arctacellularia doliiformis
sp. nov. |
USSR(Krasnoyarsk Kray) |
Late Riphean |
|
Arctacellularia |
Arctacellularia ellipsoidea
sp. nov. |
USSR(Krasnoyarsk Kray) |
Late Riphean |
|