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 Insecta Linnaeus, 1758 - insects
           Order Diptera Linnaeus, 1758 - true flies, mosquitoes, gnats
             Genus Oestrus Linnaeus, 1758
               1 Oestrus bovis Linnaeus, 1758 see Hypoderma bovis (C. Linnaeus, 1758)
               2 Oestrus tarandi Linnaeus, 1758
               3 Oestrus nasalis Linnaeus, 1758
               4 Oestrus haemorrhoidalis Linnaeus, 1758
               5 Oestrus ovis Linnaeus, 1758 - sheep bot fly