Dorsennidium |
Dorsennidium irregulare
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium irregulare
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium irregulare
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium kufferathi
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium longispiniferum
|
China |
Early Cambrian |
|
Dorsennidium |
Dorsennidium mametii
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium mamillatum
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium metum
|
England(Isle of Wight) |
Cenomanian |
|
Dorsennidium |
Dorsennidium micropolygonale
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium minor
|
Canada(Alberta) |
Late Devonian |
|
Dorsennidium |
Dorsennidium minutum
|
England(Northampton) |
Tremadocian |
|
Dorsennidium |
Dorsennidium multiangulare
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium mutabile
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium nervosum
sp. nov. |
England |
Early Jurassic |
|
Dorsennidium |
Dorsennidium novum
|
Nd |
Nd |
|
Dorsennidium |
Dorsennidium octospinosum
|
Canada(Alberta) |
Late Devonian |
|
Dorsennidium |
Dorsennidium oligospinoides
|
Nd |
Nd |
|