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Geology
Mollusca
Gastropoda
Sorbeoconcha
Acanthonematidae
Acanthonematidae
Phylum:
Mollusca
Class:
Gastropoda
Order:
Sorbeoconcha
Family:
Acanthonematidae
Genera of Acanthonematidae present in the Pennsylvanian of the American Midcontinent
Callispira
