Micrhystridium |
Micrhystridium varians
|
USSR(Yaroslav) |
Ordovician |
|
Microconcentrica |
Microconcentrica atava
|
USSR(Yaroslav) |
Ordovician |
|
Microconcentrica |
Microconcentrica typica
|
USSR(Yaroslav) |
Ordovician |
|
Priscogalea |
Priscogalea perlucida
sp. nov. |
USSR(Yaroslav) |
Ordovician |
|
Schismatosphaeridium |
Schismatosphaeridium mutnum
|
USSR(Russian Platform) |
Ordovician |
Early Devonian |
Schismatosphaeridium |
Schismatosphaeridium mutnum
sp. nov. |
USSR(Yaroslav) |
Middle Ordovician |
|
Schismatosphaeridium |
Schismatosphaeridium perforatum
|
USSR(Yaroslav) |
Middle Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium
|
USSR(Yaroslav) |
Middle Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium incomptum
|
USSR(Russian Platform) |
Ordovician |
Early Devonian |
Sulcatosphaeridium |
Sulcatosphaeridium incomptum
sp. nov. |
USSR(Yaroslav) |
Middle Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium marginatum
|
USSR(Russian Platform) |
Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium marginatum
sp. nov. |
USSR(Yaroslav) |
Middle Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium ovale
|
USSR(Russian Platform) |
Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium ovale
sp. nov. |
USSR(Yaroslav) |
Middle Ordovician |
|
Sulcatosphaeridium |
Sulcatosphaeridium tenuirugosum
sp. nov. |
USSR(Yaroslav) |
Ordovician |
|
Trachymarginata |
Trachymarginata delicata
|
USSR(Russian Platform) |
Cambrian |
Ordovician |
Trachymarginata |
Trachymarginata delicata
sp. nov. |
USSR(Kalinin) |
Middle Ordovician |
|