Kingdom Animalia Linnaeus, 1758 - animals Phylum Arthropoda Siebold, 1848 - arthropods Subphylum Chelicerata Heymons, 1901 Class Arachnida Lamarck, 1801 Order Ricinulei Thorell, 1876 - ricinuleids 1 Suborder Neoricinulei Selden, 1992 [monotypic] 2 Suborder †Palaeoricinulei Selden, 1992