Micrhystridium |
Micrhystridium stellatum
|
USSR(Orenburg) |
Silurian |
|
Multiplicisphaeridium |
Multiplicisphaeridium orbusculiferum
|
USSR(Orenburg) |
Late Ordovician |
|
Peteinosphaeridium |
Peteinosphaeridium nudum
|
USSR(Orenburg) |
Late Ordovician |
|
Retusotriletes |
Retusotriletes absurdus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes absurdus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes aculeatus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes clandestinus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes divulgatus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes insperatus
|
USSR(Orenburg) |
Early Eifelian |
|
Retusotriletes |
Retusotriletes naumovae
|
USSR(Orenburg) |
Early Eifelian |
|
Rhabdochitina |
Rhabdochitina turgida
|
USSR(Orenburg) |
Late Ordovician |
|
Siphonochitina |
Siphonochitina clavata
|
USSR(Orenburg) |
Middle Ordovician |
|
Tanuchitina |
Tanuchitina bergstroemi
|
USSR(Orenburg) |
Late Ordovician |
|
Tasmanites |
Tasmanites sp
|
USSR(Orenburg) |
Silurian |
|
Veryhachium |
Veryhachium horridum
|
USSR(Orenburg) |
Late Ordovician |
|
Veryhachium |
Veryhachium pulvillum
|
USSR(Orenburg) |
Late Ordovician |
|