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 Vermes Linnaeus, 1758 - worms see Phylum Vermes (C. Linnaeus, 1758) Order Testacea Linnaeus, 1758 Genus Arca Linnaeus, 1758 Margine crenato; Natibus recurvatis Arca lactea Linnaeus, 1758 see Striarca lactea (C. Linnaeus, 1758)