[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
           Section Eucoelomata see Superphylum Eucoelomata
             Phylum Arthropoda Siebold, 1848 - arthropods
               Subphylum Mandibulata Snodgrass, 1938
                 Class Insecta Linnaeus, 1758 - insects
                   Subclass Pterygota Lang, 1888 - winged insects see Infraclass Pterygota Lang, 1888
                     Division Hemimetabola see Division Exopterygota Sharp, 1899
                       Order Ephemeroptera Hyatt & Arms, 1891 - mayflies
                         Genus Callibaetis Eaton, 1881