Classification of Sowerby 1816
G. Nautilus Linnaeus 1758
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†Nautilus comptoni Sowerby 1816
†Nautilus simplex Sowerby 1816
G. †Ammonites Bruguière 1789
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†Ammonites auritus Sowerby 1816
†Ammonites giganteus Sowerby 1816
†Ammonites greenoughi Sowerby 1816