Acanthotriletes |
Acanthotriletes longispinosus
sp. nov. |
USSR(Siberia) |
Jurassic |
|
Adiantum |
Adiantum glaber
sp. nov. |
USSR(Siberia) |
Early Jurassic |
Middle Jurassic |
Adiantum |
Adiantum mollis
sp. nov. |
USSR(Siberia) |
Late Jurassic |
Cretaceous |
Aggerella |
Aggerella bullulinaeformis
|
USSR(Siberia) |
Late Jurassic |
|
Aggerella |
Aggerella bullulinaeformis
|
USSR(Ukrainian SSR) |
Early Jurassic |
Middle Jurassic |
Aliferina |
Aliferina falcata
|
USSR(Siberia) |
Late Jurassic |
Early Cretaceous |
Aliferina |
Aliferina variabiliformus
|
USSR(Siberia) |
Middle Jurassic |
Early Cretaceous |
Aliferina |
Aliferina variabilis
|
USSR(Siberia) |
Early Jurassic |
|
Aliferina |
Aliferina variabilis
|
USSR(Urals) |
Early Bajocian |
|
Alsophila |
Alsophila arcuata
|
USSR(Siberia) |
Middle Jurassic |
Albian |
Alsophila |
Alsophila asperata
|
USSR(Siberia) |
Middle Jurassic |
Early Cretaceous |
Alsophila |
Alsophila asperata
sp. nov. |
USSR(Siberia) |
Late Jurassic |
Early Cretaceous |
Alsophila |
Alsophila chetaensis
|
USSR(Siberia) |
Middle Jurassic |
|
Alsophila |
Alsophila parvispinosa
sp. nov. |
USSR(Siberia) |
Jurassic |
|
Anagramma |
Anagramma imperfecta
|
USSR(Siberia) |
Early Cretaceous |
|
Anagrammites |
Anagrammites imperfectus
|
USSR(Siberia) |
Early Cretaceous |
|
Anemia |
Anemia dorsostriata
sp. nov. |
USSR(Siberia) |
Middle Jurassic |
Early Cretaceous |