Archaeodiscina |
Archaeodiscina umbonulata
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Baltisphaeridium |
Baltisphaeridium cerinum
|
USSR(Latvian SSR) |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium ciliosum
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Baltisphaeridium |
Baltisphaeridium compressum
|
USSR(Latvian SSR) |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium dubium
|
USSR(Latvian SSR) |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium orbiculare
|
USSR(Latvian SSR) |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium varium
|
USSR(Latvian SSR) |
Early Cambrian |
|
Cymatiosphaera |
Cymatiosphaera sp
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Deunffia |
Deunffia dentifera
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Estiastra |
Estiastra minima
|
USSR(Latvian SSR) |
Early Cambrian |
|
Granomarginata |
Granomarginata squamacea
|
USSR(Latvian SSR) |
Early Cambrian |
|
Leiomarginata |
Leiomarginata simplex
|
USSR(Latvian SSR) |
Early Cambrian |
|
Leiosphaeridia |
Leiosphaeridia type B
sp. nov. |
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Micrhystridium |
Micrhystridium dissimilare
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Micrhystridium |
Micrhystridium lanatum
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Micrhystridium |
Micrhystridium notatum
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |
Micrhystridium |
Micrhystridium obscurum
|
USSR(Latvian SSR) |
Early Cambrian |
Middle Cambrian |