Imperium naturæ C. Linnaeus, 1758 - nature Mundus Plinius - physical world naturalia - natural bodies 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 Anarhichas Linnaeus, 1758 1 Anarhichas lupus Linnaeus, 1758 - Atlantic wolffish