Acanthodiacrodium |
Acanthodiacrodium ambiguum
|
Nd |
Nd |
|
Acanthodiacrodium |
Acanthodiacrodium amplium
|
Nd |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium anceps
|
Nd |
Middle Cambrian |
Late Cambrian |
Acanthodiacrodium |
Acanthodiacrodium anfractum
|
Nd |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium angustizonale
|
Nd |
Late Llanvirnian |
|
Acanthodiacrodium |
Acanthodiacrodium angustum
|
Nd |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium apertum
|
Nd |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium arburense
|
Nd |
Late Tremadocian |
Early Arenigian |
Acanthodiacrodium |
Acanthodiacrodium augustum
|
Nd |
Nd |
|
Acanthodiacrodium |
Acanthodiacrodium barbullatum
|
Nd |
Middle Cambrian |
|
Acanthodiacrodium |
Acanthodiacrodium bicoronatum
|
Nd |
Early Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium bimorphispinae
|
Nd |
Middle Ordovician |
|
Acanthodiacrodium |
Acanthodiacrodium biplicatum
|
Nd |
Middle Cambrian |
Late Cambrian |
Acanthodiacrodium |
Acanthodiacrodium brevispinum
|
Nd |
Early Gothlandian |
|
Acanthodiacrodium |
Acanthodiacrodium bucerum
|
Nd |
Early Ordovician |
|
Acanthodiacrodium |
Acanthodiacrodium bucerum
|
Nd |
Early Ordovician |
|
Acanthodiacrodium |
Acanthodiacrodium bucerum
|
Nd |
Early Ordovician |
|