†Equus scotti Equus niobrarensis (or commonly, Niobrara horse)[5] is an extinct species of Equus, the genus that includes the horse.

[4] It was "stout-legged" and belonged to the "big horses" category as defined by M. C.

[4] The skull of the horse was noted as being broader than Equus caballus.

[7] Fossils of E. niobrarensis were discovered at Dry Cave in New Mexico.

[8] Another mention of an E. niobrarensis discovery was in Skeleton Cave, Oregon.