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 Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825 Order Nantes Linnaeus, 1758 Genus Squalus Linnaeus, 1758 - spiny dogfishes Squalus galeus Linnaeus, 1758 see Galeorhinus galeus (C. Linnaeus, 1758)