Nimravidae is an extinct family of mammalian carnivores, sometimes known as false saber-toothed cats, whose fossils are found in North America, and Eurasia. Not considered to belong to the true cats (family Felidae), the nimravids are generally considered closely related and classified as part of suborder Feliformia. Fossils have been dated from the Middle Eocene through the Late Miocene epochs (Bartonian through Tortonian stages, 40.4—7.2 mya), spanning about 33.2 million years.