Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Cheliceriformes
       Class Chelicerata Heymons, 1901
         Subclass Arachnida Lamarck see Class Arachnida Lamarck, 1801
           Order Ricinulei Thorell, 1876 - ricinuleids
             Genus Cryptocellus Westwood, 1874
             Genus Pseudocellus Platnick, 1980
             Genus Ricinoides Ewing, 1929