Margominuscula |
Margominuscula rugosa
|
USSR |
Precambriam |
|
Margominuscula |
Margominuscula rugosa
|
China |
Precambriam |
|
Megasacculina |
Megasacculina atava
|
USSR |
Precambriam |
|
Membranilarnacia |
Membranilarnacia leptoderma
|
New Guinea |
Early Cretaceous |
|
Membranilarnax |
Membranilarnax pterospermoides
|
Baltic |
Cretaceous |
|
Membranolimbus |
Membranolimbus triangulatus
|
USSR(Siberia) |
Late Jurassic |
|
Membranophoridium |
Membranophoridium aspinatum
|
Germany |
Middle Oligocene |
|
Membranosphaera |
Membranosphaera maastrichtica
|
USSR(Siberia) |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium inconspicuum
|
France |
Cretaceous |
|
Microconcentrica |
Microconcentrica atava
|
USSR |
Precambriam |
|
Microdinium |
Microdinium ornatum
|
Australia(W.Australia) |
Late Albian |
Cenomanian |
Microrugosina |
Microrugosina sp
|
USSR |
Early Cambrian |
|
Muderongia |
Muderongia mcwhaei
|
Australia(S.Australia) |
Aptian |
|
Muiriella |
Muiriella plioplax
|
Australia |
Flandrian |
|
Multiplicisphaeridium |
Multiplicisphaeridium ramispinosum
|
Canada(Alberta) |
Late Devonian |
|
Nannoceratopsiella |
Nannoceratopsiella permiana
|
Kansas |
Permian |
|
Nannoceratopsis |
Nannoceratopsis pellucida
|
France |
Late Jurassic |
|