Acanthodiacrodium |
Acanthodiacrodium commune
|
USSR(Russian Platform) |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium convexum
|
USSR(Russian Platform) |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium enodum
|
USSR(Russian Platform) |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium punctulatum
|
USSR(Russian Platform) |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium sukatschevii
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthosphaeridium |
Acanthosphaeridium aciculare
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthosphaeridium |
Acanthosphaeridium corrugativum
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthosphaeridium |
Acanthosphaeridium gdowia
|
USSR(Russian Platform) |
Early Ordovician |
Late Ordovician |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium
|
USSR(Russian Platform) |
Late Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium acanthaceum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium angulosum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium arenigum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cinctum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium ellipsoideum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium flexile
|
USSR(Russian Platform) |
Middle Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium impalpabile
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium imperfectum
|
USSR(Russian Platform) |
Tremadocian |
|