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 Order †Phacopida Salter, 1864 Suborder †Phacopina Struve, 1959 Family †Prosopiscidae Fortey & Shergold, 1984, incertae sedis