Acanthodiacrodium |
Acanthodiacrodium barbullatum
|
Nd |
Cambrian |
|
Ancyrochitina |
Ancyrochitina fragilis
|
Nd |
Devonian |
|
Angochitina |
Angochitina bifurcata
|
Nd |
Devonian |
|
Areoligera |
Areoligera senonensis
|
Nd |
Late Cretaceous |
|
Baltisphaeridium |
Baltisphaeridium brevispinosum
|
Nd |
Silurian |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
Nd |
Silurian |
|
Cannosphaeropsis |
Cannosphaeropsis utinensis
|
Nd |
Late Cretaceous |
|
Chlamydophorella |
Chlamydophorella nyei
|
Nd |
Late Cretaceous |
|
Cirrifera |
Cirrifera unilateralis
|
Nd |
Cretaceous |
|
Clathrochitina |
Clathrochitina retifera
|
Nd |
Ordovician |
|
Conochitina |
Conochitina minnesotensis
|
Nd |
Silurian |
|
Cordosphaeridium |
Cordosphaeridium filosum
|
Nd |
Eocene |
|
Coronifera |
Coronifera sp
|
Nd |
Late Cretaceous |
|
Cyathochitina |
Cyathochitina kuckersiana
|
Nd |
Silurian |
|
Cymatiosphaera |
Cymatiosphaera sp
|
Nd |
Eocene |
|
Dapcodinium |
Dapcodinium priscus
|
Nd |
Early Jurassic |
|
Deflandrea |
Deflandrea diebelii
|
Nd |
Late Cretaceous |
|