Allonautilus
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| iAllonautilus | ||||||||||||
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| Image:Allonautilus scrobiculatus.png Allonautilus scrobiculatus shell with periostracum removed
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Data deficient (DD)
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The genus Allonautilus contains two species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Nautilus. Allonautilus is now thought to be a descendant of Nautilus and the latter paraphyletic.
