Tytthodiscus |
Tytthodiscus californiensis
|
Louisiana |
Eocene |
Late Neogene |
Tytthodiscus |
Tytthodiscus chondrotus
|
California |
Miocene |
|
Umbellasphaeridium |
Umbellasphaeridium saharicum
|
Algeria |
Famennian |
Strunian |
Umbellasphaeridium |
Umbellasphaeridium saharicum
|
Brazil |
Middle Devonian |
|
Veryhachium |
Veryhachium bacifer
|
Baltic |
Middle Ordovician |
Silurian |
Veryhachium |
Veryhachium carminae
|
Tunisia |
Silurian |
Devonian |
Veryhachium |
Veryhachium carminae
|
North America |
Silurian |
Devonian |
Veryhachium |
Veryhachium carminae
|
Spain |
Silurian |
Devonian |
Veryhachium |
Veryhachium carminae
|
Saudi Arabia |
Silurian |
|
Veryhachium |
Veryhachium carminae
|
France |
Silurian |
|
Veryhachium |
Veryhachium carminae
|
Libya |
Silurian |
|
Veryhachium |
Veryhachium carminae
|
Belgium |
Llandoverian |
|
Veryhachium |
Veryhachium carminae
|
Portuguese Guinea |
Wenlockian |
|
Veryhachium |
Veryhachium carminae
|
Morocco |
Late Arenigian |
|
Veryhachium |
Veryhachium carminae
|
France |
Caradocian |
|
Veryhachium |
Veryhachium carminae
|
Africa(Sahara) |
Middle Llandoverian |
Early Budnanian |
Veryhachium |
Veryhachium carminae
|
Africa(Sahara) |
Silurian |
Devonian |