Claim: Nautilus praepompilius is a member of the kingdom Animalia under the family Nautilidae of order Nautilida, a large and diverse order of generally coiled nautiloid cephalopods.
Evidence: Kingdom: Animalia Family: Nautilidae Order: Nautilida The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, Nautilus and Allonautilus, with six species.