Hoplophoneus had a few species that ranged in size. Hoplophoneus cerebralis was the smallest of the nimravids and was about the size of a bobcat. Some species would be as large as modern leopards or jaguars. Hoplophoneus was not the only nimravid species found in the Badlands. Other nimravids that have been found in the area include Nimravus, Dincitis, and Pogonodon. The nimravids became extinct, not long after the Badlands sediments stopped depositing. This left a gap in the cat-like carnivore record in North America, which can be observed in sites like Agate Fossil Beds National Monument. The fossil fauna of the Saber-Site. Anguidae (alligator lizards)
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[{"birds": "Hoplophoneus cerebralis", "color": "n/a", "months": "n/a", "extinct": "yes"}] [{"birds": "Hoplophoneus cerebralis", "color": "n/a", "months": "n/a", "extinct": "yes"}, {"birds": "Nimravus, Dincitis, and Pogonodon", "color": "n/a", "months": "n/a", "extinct": "yes"}] [{"birds": "n/a", "color": "n/a", "months": "n/a", "extinct": "n/a"}]