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 Insecta Linnaeus, 1758 - insects Order Coleoptera Linnaeus, 1758 - beetles Genus Gryllus Linnaeus, 1758 - field and house crickets Tettigonia Linnaeus, 1758 see Genus Tettigonia Linnaeus, 1758 Gryllus verrucivorus Linnaeus, 1758