Class Mammalia Linnaeus, 1758 - mammals Suborder †Gondwanatheria Mones, 1987, incertae sedis - gondwanatherians see Order Gondwanatheria Mones, 1987 Family †Sudamericidae Scillato-Yané & Pascual, 1984 Genus †Gondwanatherium Bonaparte, 1986 [monotypic] 1 †Gondwanatherium patagonicum Bonaparte, 1986