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Cyclonema

An Illustration by Mary Williams of a Silurian cyclonema gastropod based on several  specimens from theSilurian reef fossils of the Chicago area collection
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An Illustration by Mary Williams of a Silurian cyclonema gastropod based on several specimens from theSilurian reef fossils of the Chicago area collection .
Taxon Name: Platyceratidae Cyclonema
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Euomphalina
Family: Platyceratidae
Genus: Cyclonema

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