Arbusculidium |
Arbusculidium filamentosum
|
Sweden |
Late Cambrian |
Tremadocian |
Arbusculidium |
Arbusculidium filamentosum
|
China |
Arenigian |
|
Arbusculidium |
Arbusculidium filamentosum
|
Czechoslovakia(Bohemia) |
Arenigian |
|
Arbusculidium |
Arbusculidium filamentosum
|
Belgium |
Llanvirnian |
|
Arkonia |
Arkonia
|
England |
Early Llanvirnian |
|
Arkonia |
Arkonia
|
Wales |
Early Llanvirnian |
|
Arkonia |
Arkonia
|
Nd |
Late Arenigian |
|
Arkonia |
Arkonia
|
Morocco |
Late Arenigian |
|
Arkonia |
Arkonia
|
Czechoslovakia(Bohemia) |
Late Arenigian |
|
Aureotesta |
Aureotesta
|
China |
Early Ordovician |
|
Aureotesta |
Aureotesta clathrata
|
Morocco |
Arenigian |
|
Aureotesta |
Aureotesta clathrata
|
Czechoslovakia(Bohemia) |
Arenigian |
|
Aureotesta |
Aureotesta clathrata
|
Belgium |
Arenigian |
|
Aureotesta |
Aureotesta clathrata
|
China |
Arenigian |
|
Coryphidium |
Coryphidium
|
England(Cumberland) |
Late Tremadocian |
Early Arenigian |
Dicrodiacrodium |
Dicrodiacrodium ancoriforme
|
Morocco |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium ancoriforme
|
Belgium |
Arenigian |
Llanvirnian |