Dicrodiacrodium |
Dicrodiacrodium ancoriforme
|
Germany |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium ancoriforme
|
Czechoslovakia(Bohemia) |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium ancoriforme
|
China |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium normale
|
China |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium normale
|
Morocco |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium normale
|
Belgium |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium normale
|
Germany |
Arenigian |
Llanvirnian |
Dicrodiacrodium |
Dicrodiacrodium normale
|
Czechoslovakia(Bohemia) |
Arenigian |
Llanvirnian |
Frankea |
Frankea
|
England(Cumberland) |
Late Arenigian |
|
Frankea |
Frankea
|
England(Cumberland) |
Late Arenigian |
|
Frankea |
Frankea
|
E.Germany(Rostock) |
Arenigian |
Late Llanvirnian |
Marrocanium |
Marrocanium simplex
|
Morocco |
Arenigian |
|
Marrocanium |
Marrocanium simplex
|
Czechoslovakia(Bohemia) |
Arenigian |
|
Marrocanium |
Marrocanium simplex
|
Belgium |
Arenigian |
|
Marrocanium |
Marrocanium simplex
|
China |
Arenigian |
|
Striatotheca |
Striatotheca
|
England(Cumberland) |
Lancefieldian |
|
Striatotheca |
Striatotheca
|
Libya |
Late Ordovician |
|