Pseudozonosphaeridium |
Pseudozonosphaeridium sp
|
USSR(Russian Platform) |
Early Gothlandian |
|
Pseudozonosphaeridium |
Pseudozonosphaeridium compositum
|
USSR(Russian Platform) |
Early Gothlandian |
|
Lophosphaeridium |
Lophosphaeridium rarum
|
USSR(Russian Platform) |
Early Ordovician |
Late Ordovician |
Acanthosphaeridium |
Acanthosphaeridium gdowia
|
USSR(Russian Platform) |
Early Ordovician |
Late Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium sp
|
USSR(Russian Platform) |
Early Ordovician |
Late Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium bimarginatum
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium polyradiatum
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Leiofusa |
Leiofusa striatifera
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium solitare
|
USSR(Russian Platform) |
Middle Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium flexile
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevispinosum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rjabininii
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium ordovicum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadriradiatum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Veryhachium |
Veryhachium licidulum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Veryhachium |
Veryhachium rabiosum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Veryhachium |
Veryhachium convexum
|
USSR(Russian Platform) |
Middle Ordovician |
|