Barathrisphaeridium |
Barathrisphaeridium
|
Nd |
Nd |
|
Barathrisphaeridium |
Barathrisphaeridium chagrinense
|
Nd |
Late Devonian |
|
Barathrisphaeridium |
Barathrisphaeridium paxillum
|
Nd |
Frasnian |
Famennian |
Barathrisphaeridium |
Barathrisphaeridium pumilispinosum
|
Nd |
Late Devonian |
|
Bartenia |
Bartenia
|
Nd |
Nd |
|
Bartenia |
Bartenia communis
|
Nd |
Late Triassic |
|
Bavlinella |
Bavlinella
|
Nd |
Nd |
|
Bavlinella |
Bavlinella faveolata
|
Nd |
Late Proterozoic |
|
Bavlinella |
Bavlinella irishii
|
Nd |
Early Cambrian |
|
Bavlinella |
Bavlinella magna
|
Nd |
Nd |
|
Bavlinella |
Bavlinella minuta
|
Nd |
Nd |
|
Bavlinella |
Bavlinella nagodensis
|
Nd |
Nd |
|
Beringiella |
Beringiella
|
Nd |
Nd |
|
Beringiella |
Beringiella fritilla
|
Nd |
Late Pleistocene |
|
Beromia |
Beromia
|
Nd |
Nd |
|
Beromia |
Beromia clipeata
|
Nd |
Late Ashgillian |
|
Bion |
Bion bacifer
|
Nd |
Late Ordovician |
|