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 Aptera Linnaeus, 1758 Genus Cancer Linnaeus, 1758 - cancer crab Brachyuri Linnaeus, 1758 Brachyuri thorace inaequali Cancer punctatus Linnaeus, 1758