Hystrichosphaeridium |
Hystrichosphaeridium deanei
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium complex
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium siphoniphorum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium recurvatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium ancoriferum
|
Nd |
Nd |
|
Chlamydophorella |
Chlamydophorella nyei
|
Nd |
Nd |
|
Cleistosphaeridium |
Cleistosphaeridium ancoriferum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium pseudohystrichodinium
|
Nd |
Nd |
|
Hystrichosphaera |
Hystrichosphaera furcata
|
Nd |
Nd |
|
Hystrichosphaera |
Hystrichosphaera cingulata
|
Nd |
Nd |
|
Hystrichosphaera |
Hystrichosphaera cingulata
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera reticulata
|
Nd |
Nd |
|
Litosphaeridium |
Litosphaeridium siphoniphorum
|
Texas |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium armatum
|
Texas |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium polypes
|
Texas |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium huguoniotii
|
Texas |
Cenomanian |
|
Surculosphaeridium |
Surculosphaeridium longifurcatum
|
Texas |
Cenomanian |
|