Classification of the species Polyrhizodus digitatus

Polyrhizodus digitatus Leidy 1857
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Invalid names: Polyrhizodus amplus St. John and Worthen 1875 [synonym], Polyrhizodus excavatus Saint John and Worthen 1866 [synonym], Polyrhizodus littoni Newberry and Worthen 1870 [synonym], Polyrhizodus lobatus Newberry and Worthen 1866 [synonym], Polyrhizodus princeps Newberry and Worthen 1866 [synonym], Polyrhizodus williamsi St. John and Worthen 1875 [synonym]