Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Insecta nom. inval. - insects see Class Insecta Linnaeus, 1758
           Order Angioptera nom. inval. see Class Insecta Linnaeus, 1758
             Genus Ephemera nom. inval. see Genus Ephemera Linnaeus, 1758
               Musca Ephemera nom. inval.