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 Aptera Linnaeus, 1758
             Genus Acarus Linnaeus, 1758
               01 Acarus elephantinus Linnaeus, 1758
               02 Acarus aegyptius Linnaeus, 1758
               03 Acarus reduvius Linnaeus, 1758
               04 Acarus americanus Linnaeus, 1758
               05 Acarus sanguisugus Linnaeus, 1758
               06 Acarus ricinus Linnaeus, 1758
               07 Acarus cancroides Linnaeus, 1758
               08 Acarus scorpioides Linnaeus, 1758
               09 Acarus crassipes Linnaeus, 1758 see Pergamasus crassipes (Linnaeus, 1758)
               10 Acarus passerinus Linnaeus, 1758
               11 Acarus motatorius Linnaeus, 1758
               12 Acarus aphidioides Linnaeus, 1758
               13 Acarus coleoptratus Linnaeus, 1758
               14 Acarus telarius Linnaeus, 1758
               15 Acarus siro Linnaeus, 1758
               16 Acarus exulcerans Linnaeus, 1758
               17 Acarus geniculatus Linnaeus, 1758
               18 Acarus aquaticus Linnaeus, 1758
               19 Acarus holosericeus Linnaeus, 1758 see Trombidium holosericeum (Linnaeus, 1758)
               20 Acarus baccarum Linnaeus, 1758
               21 Acarus muscarum Linnaeus, 1758
               22 Acarus batatas Linnaeus, 1758
               23 Acarus gymnopterorũ Linnaeus, 1758
               24 Acarus coleoptratorũ Linnaeus, 1758 see Acarus coleoptratorum C. Linnaeus, 1758, nom. corr.
               25 Acarus rupeſtris Linnaeus, 1758
               26 Acarus longicornis Linnaeus, 1758
               27 Acarus littoralis Linnaeus, 1758
               28 Acarus Fungorum Linnaeus, 1758
               29 Acarus ſcaber Linnaeus, 1758
               30 Acarus Salicinus Linnaeus, 1758
               31 Acarus croceus Linnaeus, 1758