Dorsennidium |
Dorsennidium radiosum
|
Canada(Ontario) |
Early Devonian |
|
Dorsennidium |
Dorsennidium rhombispinosum
|
England |
Silurian |
|
Dorsennidium |
Dorsennidium rhomboidium
|
England |
Silurian |
|
Dorsennidium |
Dorsennidium riburgense
|
Switzerland |
Middle Triassic |
|
Dorsennidium |
Dorsennidium sedecimispinosum
|
Canada(Alberta) |
Late Devonian |
|
Dorsennidium |
Dorsennidium signum
|
France |
Middle Devonian |
|
Dorsennidium |
Dorsennidium simplex
|
Ohio |
Early Carboniferous |
|
Dorsennidium |
Dorsennidium singulare
|
France |
Late Cretaceous |
|
Dorsennidium |
Dorsennidium sortehatense
|
Greenland |
Middle Jurassic |
|
Dorsennidium |
Dorsennidium splendens
|
France(Ille-et-Vilaine) |
Llanvirnian |
|
Dorsennidium |
Dorsennidium stelligerum
|
Canada |
Middle Devonian |
|
Dorsennidium |
Dorsennidium stelligerum
|
Spain |
Late Silesian |
|
Dorsennidium |
Dorsennidium stelligerum
|
France |
Middle Ordovician |
|
Dorsennidium |
Dorsennidium stelligerum
|
Canada |
Middle Devonian |
|
Dorsennidium |
Dorsennidium sufflatum
|
Norway |
Tremadocian |
|
Dorsennidium |
Dorsennidium symmetricum
|
China |
Early Ordovician |
|
Dorsennidium |
Dorsennidium tetraxis
|
England(Yorkshire) |
Late Oxfordian |
|