Megistaspis |
Megistaspis estonica
|
USSR(Estonian SSR) |
Tremadocian |
|
Micrhystridium |
Micrhystridium bacilliferum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium incertum
|
USSR(Estonian SSR) |
Tremadocian |
|
Micrhystridium |
Micrhystridium nanum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium paraguaferum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium sp
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium stellatum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium varians
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Multiplicisphaeridium |
Multiplicisphaeridium cristatum
|
USSR(Estonian SSR) |
Tremadocian |
|
Oistodus |
Oistodus lanceolatus
|
USSR(Estonian SSR) |
Tremadocian |
|
Orthosphaeridium |
Orthosphaeridium sp
|
USSR(Estonian SSR) |
Tremadocian |
|
Pararaphistoma |
Pararaphistoma qualteriatum
|
USSR(Estonian SSR) |
Tremadocian |
|
Peteinosphaeridium |
Peteinosphaeridium bergstroemii
|
USSR(Estonian SSR) |
Tremadocian |
|
Peteinosphaeridium |
Peteinosphaeridium bergstroemii
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Peteinosphaeridium |
Peteinosphaeridium sp
|
USSR(Estonian SSR) |
Tremadocian |
|
Peteinosphaeridium |
Peteinosphaeridium trifurcatum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Platystrophia |
Platystrophia biforata
|
USSR(Estonian SSR) |
Middle Ordovician |
|