Palaeostomocystis |
Palaeostomocystis cylindrica
|
Australia(W.Australia) |
Oxfordian |
Early Kimmeridgian |
Palaeostomocystis |
Palaeostomocystis cylindrica
|
Australia(W.Australia) |
Tithonian |
|
Palaeostomocystis |
Palaeostomocystis sinuosa
|
Australia(W.Australia) |
Tithonian |
|
Palaeostomocystis |
Palaeostomocystis fragilis
|
Australia(W.Australia) |
Aptian |
Cenomanian |
Pterospermella |
Pterospermella aureolata
|
Australia(W.Australia) |
Late Neocomian |
Early Turonian |
Pterospermella |
Pterospermella centrata
|
Australia(W.Australia) |
Middle Cretaceous |
|
Pterospermella |
Pterospermella pastielsii
|
Australia(W.Australia) |
Middle Cretaceous |
|
Pterospermella |
Pterospermella eurypteris
|
Australia(W.Australia) |
Late Neocomian |
Cenomanian |
Pterospermella |
Pterospermella microptera
|
Australia(W.Australia) |
Middle Miocene |
|
Pterospermella |
Pterospermella microptera
|
Australia(W.Australia) |
Early Tertiary |
|
Multiplicisphaeridium |
Multiplicisphaeridium kahleri
|
Austria |
Middle Gothlandian |
Late Gothlandian |
Aremoricanium |
Aremoricanium cylindrosum
|
Baltic |
Middle Ordovician |
|
Peteinosphaeridium |
Peteinosphaeridium nudum
|
Baltic |
Middle Ordovician |
|
Baltisphaeridium |
Baltisphaeridium calicispinae
|
Baltic |
Silurian |
|
Goniosphaeridium |
Goniosphaeridium polygonale
|
Baltic |
Silurian |
|
Baltisphaeridium |
Baltisphaeridium plicatispinae
|
Baltic |
Silurian |
|
Baltisphaeridium |
Baltisphaeridium diploporum
|
Baltic |
Ordovician |
|