Acanthodiacrodium |
Acanthodiacrodium angustum
|
Baltic |
Early Ordovician |
|
Acanthodiacrodium |
Acanthodiacrodium sp.A
sp. nov. |
China(Manchuria,Jilin) |
Cambrian |
Early Ordovician |
Actinotodissus |
Actinotodissus achrasii
|
Canada(Alberta) |
Late Cambrian |
Early Ordovician |
Actinotodissus |
Actinotodissus achrasii
|
England |
Early Ordovician |
|
Actinotodissus |
Actinotodissus achrasii
|
China(Manchuria,Jilin) |
Cambrian |
Early Ordovician |
Actinotodissus |
Actinotodissus sp.A
sp. nov. |
Canada(Alberta) |
Late Cambrian |
Early Ordovician |
Ammonidium |
Ammonidium exoticum
|
Nd |
Late Devonian |
|
Annulum |
Annulum squamaceum
|
Europe(E.Europe) |
Early Cambrian |
|
Annulum |
Annulum squamaceum
|
Wales(Flintshire) |
Middle Cambrian |
|
Arbusculidium |
Arbusculidium destombesii
|
Baltic |
Early Ordovician |
|
Arbusculidium |
Arbusculidium frondiferum
|
Baltic |
Early Ordovician |
|
Arbusculidium |
Arbusculidium ornatum
|
Baltic |
Early Ordovician |
|
Arbusculidium |
Arbusculidium ramusculosum
|
Baltic |
Early Ordovician |
|
Archaeodiscina |
Archaeodiscina umbonulata
|
Nd |
Nd |
|
Aryballomorpha |
Aryballomorpha
|
Nd |
Nd |
|
Aryballomorpha |
Aryballomorpha grootaertii
|
China(Liaoning) |
Tremadocian |
|
Ascostomocystis |
Ascostomocystis granosa
|
Nd |
Nd |
|