Megistotherium Temporal range: early Miocene 23.03–11.61 Ma PreЄ Є O S D C P T J K Pg N Megistotherium osteothlastes Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: †Creodonta Family: †Hyaenodontidae Subfamily: †Hyainailourinae Genus: †Megistotherium Savage, 1973[1] Species: †M. osteothlastes Binomial name †Megistotherium osteothlastes Savage, 1073