Protosphaeridium |
Protosphaeridium rigidulum
sp. nov. |
USSR(Ukrainian SSR) |
Proterozoic |
|
Lophosphaeridium |
Lophosphaeridium plicatum
|
USSR(Vologda) |
Early Ordovician |
|
Tasmanites |
Tasmanites sp
|
USSR(Vologda) |
Early Ordovician |
|
Trematosphaeridium |
Trematosphaeridium sp
|
USSR(Vologda) |
Early Ordovician |
|
Baltisphaeridium |
Baltisphaeridium sp
|
USSR(Vologda) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rjabininii
|
USSR(Vologda) |
Early Ordovician |
|
Ooidium |
Ooidium sablincaense
|
USSR(Vologda) |
Middle Cambrian |
|
Trachyrytidodiacrodium |
Trachyrytidodiacrodium involutivum
|
USSR(Vologda) |
Middle Cambrian |
|
Lophodiacrodium |
Lophodiacrodium gracile
|
USSR(Vologda) |
Middle Cambrian |
|
Lophorytidodiacrodium |
Lophorytidodiacrodium gibbosum
|
USSR(Vologda) |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium plenum
|
USSR(Vologda) |
Middle Cambrian |
|
Acanthorytidodiacrodium |
Acanthorytidodiacrodium lentiforme
|
USSR(Vologda) |
Middle Cambrian |
|
Trachydiacrodium |
Trachydiacrodium maximum
|
USSR(Vologda) |
Tremadocian |
|
Dasydiacrodium |
Dasydiacrodium prominens
|
USSR(Vologda) |
Tremadocian |
|
Dasyrytidodiacrodium |
Dasyrytidodiacrodium asymmetricum
|
USSR(Vologda) |
Tremadocian |
|
Trachysphaeridium |
Trachysphaeridium sp. Timo.,1966
sp. nov. |
USSR(Vologda) |
Early Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium sp
|
USSR(Vologda) |
Early Cambrian |
|