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 Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758 Branchiostegi Linnaeus, 1758 Ostracion Linnaeus, 1758 Ostracion tricornis Linnaeus, 1758 see Acanthostracion quadricornis (C. Linnaeus, 1758)