Archaeodiscina |
Archaeodiscina granulata
|
USSR(Estonian SSR) |
Early Cambrian |
|
Archaeoperisaccus |
Archaeoperisaccus balticus
|
USSR(Estonian SSR) |
Early Cambrian |
|
Granomarginata |
Granomarginata prima
|
USSR(Estonian SSR) |
Early Cambrian |
|
Leiomarginata |
Leiomarginata simplex
|
USSR(Estonian SSR) |
Early Cambrian |
|
Angularia |
Angularia viridula
|
USSR(Siberia) |
Late Cretaceous |
|
Membranosphaera |
Membranosphaera maastrichtica
|
USSR(Siberia) |
Late Cretaceous |
|
Membranolimbus |
Membranolimbus triangulatus
|
USSR(Siberia) |
Late Jurassic |
|
Polyedrosphaeridium |
Polyedrosphaeridium hidusense
|
USSR(Siberia) |
Early Cambrian |
|