Leiosphaeridia |
Leiosphaeridia microcystis
|
USSR(Baltic) |
Ludlovian |
|
Leiosphaeridia |
Leiosphaeridia reticulata
|
USSR(Baltic) |
Silurian |
|
Leiosphaeridia |
Leiosphaeridia sp
|
Nd |
Nd |
|
Leiosphaeridia |
Leiosphaeridia sp
|
Nd |
Nd |
|
Leiosphaeridia |
Leiosphaeridia sp
|
Nd |
Nd |
|
Leiosphaeridia |
Leiosphaeridia sp
|
Nd |
Nd |
|
Leiosphaeridia |
Leiosphaeridia tenuissima
|
USSR(Pre-Baltic) |
Ordovician |
|
Leiosphaeridia |
Leiosphaeridia voigtii
|
USSR(Baltic) |
Ordovician |
|
Tasmanites |
Tasmanites huronensis
|
USSR(Baltic) |
Middle Devonian |
|
Tasmanites |
Tasmanites huronensis
|
USSR(Baltic) |
Arenigian |
|
Tasmanites |
Tasmanites huronensis
|
USSR(Baltic) |
Ashgillian |
|
Tasmanites |
Tasmanites huronensis
|
USSR(Baltic) |
Early Ludlovian |
|
Tasmanites |
Tasmanites martinssonii
sp. nov. |
E.Germany(Potsdam) |
Ordovician |
|
Tasmanites |
Tasmanites martinssonii
sp. nov. |
Finland |
Ordovician |
|
Tasmanites |
Tasmanites martinssonii
sp. nov. |
Poland |
Ordovician |
|
Tasmanites |
Tasmanites medius
|
USSR(Baltic) |
Silurian |
|
Tasmanites |
Tasmanites sp
|
Nd |
Nd |
|