Nannoceratopsis |
Nannoceratopsis spiculata
|
Nd |
Bajocian |
Bathonian |
Netrelytron |
Netrelytron par
|
Nd |
Middle Kimmeridgian |
Late Kimmeridgian |
Netrelytron |
Netrelytron stegastum
|
Nd |
Oxfordian |
Early Kimmeridgian |
Occisucysta |
Occisucysta balios
|
Nd |
Early Kimmeridgian |
Middle Kimmeridgian |
Occisucysta |
Occisucysta evittii
|
Nd |
Middle Kimmeridgian |
Portlandian |
Occisucysta |
Occisucysta monoheuriskos
|
Nd |
Early Kimmeridgian |
Middle Kimmeridgian |
Oligosphaeridium |
Oligosphaeridium pulcherrimum
|
Nd |
Nd |
|
Omatia |
Omatia montgomeryi
|
Nd |
Late Portlandian |
Cretaceous |
Opaeopsomus |
Opaeopsomus wapellensis
|
Nd |
Callovian |
|
Palaeosphaerium |
Palaeosphaerium infrequens
|
Nd |
Nd |
|
Palhistiodinia |
Palhistiodinia arcana
|
Nd |
Nd |
|
Paragonyaulacysta |
Paragonyaulacysta calloviensis
|
Nd |
Early Callovian |
|
Paranetrelytron |
Paranetrelytron
|
Nd |
Cretaceous |
|
Pareodinia |
Pareodinia alaskensis
|
Nd |
Callovian |
Middle Kimmeridgian |
Pareodinia |
Pareodinia antennata
|
Nd |
Kimmeridgian |
|
Pareodinia |
Pareodinia apotomocerastes
|
Nd |
Middle Bathonian |
|
Pareodinia |
Pareodinia apotomocerastes
|
Nd |
Callovian |
|