Visbysphaera |
Visbysphaera brevifurcata
|
Baltic |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevifurcatum
|
Baltic |
Late Llandoverian |
|
Visbysphaera |
Visbysphaera oligofurcata
|
Baltic |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligofurcatum
|
Baltic |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium microspinosum
|
Baltic |
Late Llandoverian |
|
Visbysphaera |
Visbysphaera microspinosa
|
Baltic |
Late Llandoverian |
|
Ammonidium |
Ammonidium hydraferum
|
Belgium |
Frasnian |
|
Ammonidium |
Ammonidium paleozoicum
|
Belgium |
Tournaisian |
|
Baltisphaeridium |
Baltisphaeridium hydraferum
|
Belgium |
Frasnian |
|
Baltisphaeridium |
Baltisphaeridium paleozoicum
|
Belgium |
Tournaisian |
|
Veryhachium |
Veryhachium remotum
|
Canada |
Silurian |
Devonian |
Evittia |
Evittia remota
|
Canada |
Silurian |
Devonian |
Ammonidium |
Ammonidium sprucegrovense
|
Canada(Alberta) |
Late Devonian |
|
Multiplicisphaeridium |
Multiplicisphaeridium sprucegrovense
|
Canada(Alberta) |
Late Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium eoplanctonicum
|
E.Germany(Rostock) |
Late Ludlovian |
|
Multiplicisphaeridium |
Multiplicisphaeridium eoplanktonicum
|
E.Germany(Rostock) |
Late Ludlovian |
|
Hystrichosphaeridium |
Hystrichosphaeridium meson
|
E.Germany(Rostock) |
Late Ludlovian |
|