Hystrichosphaeridium |
Hystrichosphaeridium salpingophorum
|
Nd |
Jurassic |
Senonian |
Hystrichosphaeridium |
Hystrichosphaeridium sp
|
Nd |
Tertiary |
|
Micrhystridium |
Micrhystridium
|
Nd |
Silurian |
Cretaceous |
Leiosphaera |
Leiosphaera
|
Nd |
Silurian |
Cretaceous |
Micrhystridium |
Micrhystridium bigotii
|
Nd |
Bajocian |
|
Membranilarnax |
Membranilarnax ovulum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium inconspicuum
|
Nd |
Bajocian |
Senonian |
Micrhystridium |
Micrhystridium bacilliferum
|
Nd |
Visean |
|
Cannosphaeropsis |
Cannosphaeropsis
|
Nd |
Jurassic |
Cretaceous |
Areoligera |
Areoligera
|
Nd |
Jurassic |
Cretaceous |
Membranilarnax |
Membranilarnax
|
Nd |
Jurassic |
Cretaceous |
Cannosphaeropsis |
Cannosphaeropsis aemula
|
Nd |
Oxfordian |
|
Disphaerogena |
Disphaerogena
|
Nd |
Cretaceous |
|
Triblastula |
Triblastula
|
Nd |
Cretaceous |
|
Lagenochitina |
Lagenochitina
|
Nd |
Ordovician |
Silurian |
Conochitina |
Conochitina claviformis
|
Nd |
Ordovician |
Silurian |
Rhabdochitina |
Rhabdochitina
|
Nd |
Ordovician |
Silurian |