Leiomarginata |
Leiomarginata simplex
|
USSR |
Late Precambrian |
Early Cambrian |
Granomarginata |
Granomarginata prima
|
USSR |
Late Precambrian |
Early Cambrian |
Acanthosphaera |
Acanthosphaera cambriensis
|
USSR |
Late Precambrian |
Early Cambrian |
Micrhystridium |
Micrhystridium parva
|
USSR |
Late Precambrian |
Early Cambrian |
Archaeosacculina |
Archaeosacculina baltica
|
USSR |
Late Precambrian |
Early Cambrian |
Hystrichosphaeridium |
Hystrichosphaeridium atavum
|
USSR |
Late Precambrian |
Early Cambrian |
Granomarginata |
Granomarginata vulgaris
|
USSR |
Late Precambrian |
Early Cambrian |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium zalesskyi
|
USSR |
Late Precambrian |
Early Cambrian |
Archaeopsophosphaera |
Archaeopsophosphaera tenner
|
USSR |
Late Precambrian |
Early Cambrian |
Micrhystridium |
Micrhystridium sp
|
USSR |
Late Precambrian |
Early Cambrian |
Margoporina |
Margoporina sp
|
USSR |
Late Precambrian |
Early Cambrian |
Leiopsophosphaera |
Leiopsophosphaera sp
|
USSR |
Late Precambrian |
Early Cambrian |
Concentrica |
Concentrica solida
|
USSR |
Silurian |
|
Concentrica |
Concentrica manifesta
|
USSR |
Silurian |
|
Concentrica |
Concentrica miranda
|
USSR |
Silurian |
|
Archaeofavosina |
Archaeofavosina minuta
|
USSR |
Cambrian |
|
Favosina |
Favosina typica
|
USSR |
Silurian |
|