Acanthodiacrodium |
Acanthodiacrodium dentiferum
|
W.Germany |
Cambrian |
|
Anthatractus |
Anthatractus insolitus
|
Canada |
Devonian |
|
Archaeodiscina |
Archaeodiscina granulata
|
USSR(Estonian SSR) |
Early Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium sp
|
Nd |
Cambrian |
Ordovician |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium vologdense
|
USSR |
Cambrian |
|
Archaeoperisaccus |
Archaeoperisaccus balticus
|
USSR(Estonian SSR) |
Early Cambrian |
|
Aremoricanium |
Aremoricanium rigaudiae
|
France |
Ordovician |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
Baltic |
Ordovician |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
Baltic |
Silurian |
|
Buedingiisphaeridium |
Buedingiisphaeridium permicum
|
W.Germany |
Late Permian |
|
Cepillum |
Cepillum puercoespinoide
|
Spain |
Silurian |
|
Cymatiogalea |
Cymatiogalea margaritata
|
Africa |
Tremadocian |
|
Cymatiosphaera |
Cymatiosphaera nebulosa
|
Belgium |
Devonian |
|
Cymatiosphaera |
Cymatiosphaera radiata
|
Baltic |
Cretaceous |
|
Dasydiacrodium |
Dasydiacrodium eichwaldii
|
USSR |
Cambrian |
|
Deunffia |
Deunffia monospinosa
|
England |
Silurian |
|
Dictyotidium |
Dictyotidium dictyotum
|
Canada |
Devonian |
|