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 Macrouri Linnaeus, 1758 Macrouri thorace aculeato 50 Cancer pilosus Linnaeus, 1758 51 Cancer norvegicus Linnaeus, 1758