Lophodiacrodium |
Lophodiacrodium gracile
|
USSR(Estonian SSR) |
Middle Cambrian |
|
Acanthorytidodiacrodium |
Acanthorytidodiacrodium prolongatum
|
USSR(Estonian SSR) |
Middle Cambrian |
|
Ooidium |
Ooidium rossicum
|
USSR(Estonian SSR) |
Middle Cambrian |
|
Protosphaeridium |
Protosphaeridium
|
USSR(Kalinin) |
Late Ordovician |
|
Protosphaeridium |
Protosphaeridium papyraceum
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Protosphaeridium |
Protosphaeridium densum
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Protosphaeridium |
Protosphaeridium asaphum
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Stictosphaeridium |
Stictosphaeridium tortulosum
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium ianischewskyi
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cellulare
|
USSR(Latvian SSR) |
Middle Cambrian |
|
Protosphaeridium |
Protosphaeridium asaphum
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Kildinella |
Kildinella
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Leiosphaeridia |
Leiosphaeridia
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Trachysphaeridium |
Trachysphaeridium attenuatum
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Lophosphaeridium |
Lophosphaeridium rarum
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Turuchanica |
Turuchanica ternata
|
USSR(Lithuanian SSR) |
Late Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium pungens
|
USSR(Lithuanian SSR) |
Late Ordovician |
|