Dasydiacrodium |
Dasydiacrodium tricorne
sp. nov. |
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium tener
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium operculatum
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium solitare
|
USSR(Leningrad) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cellulare
|
USSR(Leningrad) |
Middle Cambrian |
|
Lophorytidodiacrodium |
Lophorytidodiacrodium sp
|
USSR(Leningrad) |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium abortivum
|
USSR(Leningrad) |
Middle Cambrian |
|
Ooidium |
Ooidium sablincaense
|
USSR(Leningrad) |
Middle Cambrian |
|
Leiosphaeridia |
Leiosphaeridia
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Trachysphaeridium |
Trachysphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Favososphaeridium |
Favososphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Zonosphaeridium |
Zonosphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Orygmatosphaeridium |
Orygmatosphaeridium sp
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Baltisphaeridium |
Baltisphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Micrhystridium |
Micrhystridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium
|
USSR(Pre-Baltic) |
Early Ordovician |
|