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Cyrtactinoceras
Taxonomy
Cyrtactinoceras was named by Hyatt in Zittel (1900) [Sepkoski's age data: O Llvi S Ludl-u Sepkoski's reference number: 298,524].
It was assigned to Proteoceratidae by Flower (1962), Teichert et al. (1964), Crick (1981).
It was assigned to Proteoceratidae by Flower (1962), Teichert et al. (1964), Crick (1981).
Species