Nimravides

Nimravides is a genus of extinct saber-toothed cats that lived in North America during the Late Miocene, between 10.3 and 5.332 Ma.[1] Despite its scientific name, Nimravides does not belong to the Nimravidae, but is a true cat, belonging to the family Felidae.[2] Nimravides catacopsis, one of the largest and latest species, was quite large, measuring 100 cm (1.0 m) at the shoulder and was similar in size to a large tiger. It was also possessed of long, powerful legs and a long back. For many decades, it was also believed to be a member of the genus Machairodus, but, despite the similarities between them at first glance, based on autapomorphies in the skeleton, the two animals are too different to be classified as species of the same genus, and thus, Nimravides remains separate as its own genus within the Homotherini.[3]

Nimravides
Temporal range:
Nimravides catocopis skull
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Suborder: Feliformia
Family: Felidae
Subfamily: †Machairodontinae
Tribe: †Homotherini
Genus: †Nimravides
Kitts 1958
Type species
Nimravides thinobates
Macdonald, 1948
Species
  • N. catocopis Cope, 1887
  • N. pedionomus MacDonald, 1948
  • N. hibbardi Dalquest, 1969
  • N. galiani Baskin, 1981
Synonyms

N. thinobates

  • Pseudaelurus thinobates

N. pedionomus

  • Pseudaelurus pedionomus

N. hibbardi

  • Pseudaelurus hibbardi

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 earl-late Hemphilian 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.[4]

References
  1. Paleobiology Database: Nimravides
  2. Larry D.Martin: Felidae in Evolution of Tertiary Mammals of North America, Volume 1: Terrestrial Carnivores, Ungulates, Ungulatelike Mammals, Cambridge University Press, 1998
  3. Antón, Mauricio (2013). Sabertooth. Bloomington, Indiana: University of Indiana Press. p. 123. ISBN 9780253010421.
  4. https://www.sciencedirect.com/science/article/pii/S2589004222019095


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