N. catocopis N. thinobates N. pedionomus N. hibbardi Nimravides is a genus of extinct saber-toothed cats that lived in North America during the Late Miocene, between 11 and 6.5 Ma.

[4] The species Machaerodus catocopis was described by Cope in 1887, based on a partial mandible from the Loup Fork Beds.

[6][7] In 1975, Martin and Schultz reassigned Machairodus catacopsis to Nimravides and suggested that N. thinobates was a junior synonym of the former species.

[14] Evidence published in November, 2022 suggests Nimravides was endemic to North America and that when the Machairodus-Amphimachairodus lineage emigrated to North America from Eurasia, differing aspects of their cranial anatomy allowed the newly arrived machairodont genera to survive a faunal change occurring during the early-late Hemphillian stage of the Miocene Epoch some 6.5 million years ago.

The analysis also determined that the Machairodus-Amphimachairodus lineage did not have a competitive edge over Nimravides, implying that neither newcomer or endemic species were superior to one another in regards to hunting adaptations.