Imperium naturae C. Linnaeus, 1758 - nature Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758 Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758 Order Apodes Linnaeus, 1758 see Order Anguilliformes Rafinesque, 1810 Genus Xiphias Linnaeus, 1758