Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972 Superfamily †Microsyopoidea Osborn & Wortman, 1892 Family †Toliapinidae Hooker, Russell & Phélizon, 1999 Genus †Altiatlasius Sigé, 1990 1 †Altiatlasius koulchiiᵀ Sigé, Jaeger, Sudre & Vianey-Liaud, 1990