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Grypoceras
Taxonomy
Grypoceras was named by Hyatt (1883) [Sepkoski's age data: Tr Olen Tr Nori Sepkoski's reference number: 2,524,995].
It was reranked as Nautilus (Grypoceras) by Diener (1903).
It was assigned to Nautilus by Diener (1903); to Nautilida by Sepkoski (2002); and to Grypoceratidae by Teichert et al. (1964), Parnes (1986), Pérez-Valera et al. (2017).
It was reranked as Nautilus (Grypoceras) by Diener (1903).
It was assigned to Nautilus by Diener (1903); to Nautilida by Sepkoski (2002); and to Grypoceratidae by Teichert et al. (1964), Parnes (1986), Pérez-Valera et al. (2017).
Species
Species lacking formal opinion data