Class [Mammalia] Linnaeus, 1758 - mammals Family †Purgatoriidae Van Valen & Sloan, 1965 Genus †Purgatorius Van Valen & Sloan, 1965 1 †Purgatorius unio Van Valen & Sloan, 1965 2 †Purgatorius titusi Buckley, 1997 3 †Purgatorius janisae Van Valen, 1994