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 Aptera nom. inval. see Order Aptera Linnaeus, 1758
             Genus Monoculus nom. inval. see Genus Monoculus Linnaeus, 1758, nom. oblit.
               1 Pulex arborescens Swam., nom. inval.
               1.0.1 Monoculus Bradl., nom. inval. see Pulex arborescens Swam., nom. inval.
               1.0.2 Apus Frisch, nom. inval. see Pulex arborescens Swam., nom. inval.