Kingdom Animalia Linnaeus, 1758 - animals Phylum Arthropoda Siebold, 1848 - arthropods Subphylum †Trilobitomorpha Størmer, 1944 - trilobites see Superclass Trilobitomorpha Størmer, 1944 Class †Trilobita Walch, 1771 - trilobites Family †Ptychopariidae Matthew, 1887, incertae sedis [polyphyletic]