Ordovicidium |
Ordovicidium elegantulum
|
Nd |
Llandeilian |
|
Ordovicidium |
Ordovicidium fissum
|
Nd |
Late Caradocian |
|
Ordovicidium |
Ordovicidium gracile
|
Nd |
Late Ordovician |
|
Ordovicidium |
Ordovicidium groetlingboense
|
Nd |
Middle Ordovician |
|
Ordovicidium |
Ordovicidium heteromorphicum
|
Nd |
Middle Ordovician |
|
Ordovicidium |
Ordovicidium heteromorphicum
|
Finland |
Ordovician |
|
Ordovicidium |
Ordovicidium heteromorphicum
|
Nd |
Middle Ordovician |
|
Ordovicidium |
Ordovicidium majorfurcatum
|
Nd |
Middle Ordovician |
|
Ordovicidium |
Ordovicidium majorvesiculum
|
Sweden |
Middle Ordovician |
|
Ordovicidium |
Ordovicidium nudum
|
Nd |
Middle Ordovician |
|
Ornatasphaera |
Ornatasphaera
|
Nd |
Nd |
|
Ornatasphaera |
Ornatasphaera elliptica
|
Nd |
Late Quaternary |
|
Ornatasphaera |
Ornatasphaera globata
|
Nd |
Late Quaternary |
|
Ornatasphaera |
Ornatasphaera reticulata
|
Nd |
Late Quaternary |
|
Orthosphaeridium |
Orthosphaeridium
|
Nd |
Nd |
|
Orthosphaeridium |
Orthosphaeridium abbreviatum
|
Nd |
Late Llanvirnian |
|
Orthosphaeridium |
Orthosphaeridium bispinosum
|
Nd |
Onnian |
|