Oligosphaeridium |
Oligosphaeridium complex
|
Nd |
Early Oxfordian |
|
Perisseiasphaeridium |
Perisseiasphaeridium ingegerdiae
|
Nd |
Late Callovian |
Kimmeridgian |
Polystephanephorus |
Polystephanephorus
|
England(Yorkshire) |
Early Oxfordian |
|
Polystephanephorus |
Polystephanephorus calathus
|
Nd |
Early Oxfordian |
|
Polystephanephorus |
Polystephanephorus caulleryi
|
Nd |
Nd |
|
Polystephanephorus |
Polystephanephorus caulleryi
|
Nd |
Nd |
|
Polystephanephorus |
Polystephanephorus euryanthus
|
Nd |
Nd |
|
Polystephanephorus |
Polystephanephorus paracalathus
|
Nd |
Middle Callovian |
Middle Oxfordian |
Polystephanephorus |
Polystephanephorus paracalathus
|
Nd |
Nd |
|
Polystephanephorus |
Polystephanephorus sp. Conw.,1978
sp. nov. |
Nd |
Nd |
|
Polystephanephorus |
Polystephanephorus speciosus
|
Nd |
Nd |
|
Rigaudella |
Rigaudella aemula
|
Nd |
Callovian |
Kimmeridgian |
Rigaudella |
Rigaudella aemula
|
Nd |
Nd |
|
Rigaudella |
Rigaudella filamentosa
|
Nd |
Callovian |
Kimmeridgian |
Surculosphaeridium |
Surculosphaeridium
|
Nd |
Nd |
|
Surculosphaeridium |
Surculosphaeridium cribrotubiferum
|
Nd |
Callovian |
|
Surculosphaeridium |
Surculosphaeridium vestitum
|
Nd |
Middle Callovian |
Oxfordian |