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Spirodentalium Walcott, 1890, was originally described as a scaphopod. A reinterpretation of the type lot suggests that its overall shape is that of an open-coiled gastropod. If so, this is probably the earliest known open-coiled form and it is sinistral in coiling direction. -Author
Additional Publication Details
Redescription of Spirodentalium Walcott ( Gastropoda: Late Cambrian) from Wisconsin ( USA).