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 "Jumenta" nom. inval.] see Class Mammalia Linnaeus, 1758 [Genus "Hippopotamus" nom. inval.] see Genus Hippopotamus Linnaeus, 1758 1 ["Equus marinus" nom. inval.]