Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies ["Animale Regnum" nom. inval. - animal kingdom] see Kingdom Animalia Linnaeus, 1758 [Class "Qvadrupedia" nom. inval.] see Class Mammalia Linnaeus, 1758 [Order "Ferae" nom. inval.] see Order Ferae Linnaeus, 1758 [Genus "Ursus" nom. inval.] see Genus Ursus Linnaeus, 1758 ["Wickhead" Angl., nom. inval.]