Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium vermium
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium vermium
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium vermium
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha insolita
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha pileiformis
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha sp
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Pterospermopsimorpha |
Pterospermopsimorpha sp
|
USSR(Siberia) |
Riphean |
|
Rhabdochitina |
Rhabdochitina sp
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata crassa
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata formosa
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata gigantea
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata mirabilis
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata ovalis
|
USSR(Vologda) |
Middle Ordovician |
|
Rifeniata |
Rifeniata prima
|
USSR(Vologda) |
Middle Ordovician |
|