Nimravides pedionomus, this was referred in 2003 to Nimravides hibbardi instead. In 2001, Tom Rothwell described a skeleton from the later Hemingfordian as Pseudaelurus validus. The skeleton was originally collected in 1939 from the Nambe Member locality in New Mexico. In the same paper, he also assigned a number of specimens collected from multiple localities in Nebraska, dated to the late Hemingfordian and early Barstovian. A systematic review of the genus in 2003 by Tom Rothwell nominated a new species, Pseudaelurus skinneri, and recombined Lynx stouti as Pseudaelurus stouti. Pseudaelurus skinneri was described based on several jaw fragments collected from various late Hemingfordian localities in Nebraska. Lynx stouti was first described in 1972 based on some late Barstovian material, a partial skull and mandible, collected in Colorado. He also referred a number of other specimens, collected from early Barstovian localities in Nebraska and New Mexico and from late Barstovian localities in New Mexico and Colorado, to Pseudaelurus stouti. The genus Hyperailurictis was first described in 1929 by Ketzoi, using Pseudaelurus intrepidus as the type species, proposed to include all Pseudaelurus-grade felids from North America. However, this was largely ignored by later studies until a 2010 review of the Felidae as a whole brought up the proposal again, leading to some authors, though not all, recognizing the generic split. Description Hyperailurictis intrepidus was a relatively large species, comparable in size to a modern-day leopard, and overlapping in size with the Eurasian Pseudaelurus quadridentatus. H. marshi was also a large species, but differed from H. intrepidus because of certain mandibular features. H. stouti, which was contemporary with the two, was by contrast a very small and slender felid. H. validus overlaps in size with H. intrepidus and H. marshi, being similar in size to a leopard. The final species, H. skinneri is much smaller than H. validus, overlapping in size with the Eurasian species Pseudaelurus lorteti, P. cuspidatus, and P. guangheensis. Distribution and habitat Hyperailurictis validus and Hyperailurictis skinneri are the earliest recorded species, both occurring in various late Hemingfordian localities; H. validus in New Mexico and Nebraska, and H. skinneri only in Nebraska. H. validus is also known from several early Barstovian localities in Nebraska. Also known from early Barstovian-aged localities are the species H. intrepidus (localities in Texas, Colorado, Nevada, California, and Nebraska), H marshi (localities in Texas, California, Colorado, and Nebraska) and H. stouti (from localities in Nebraska and