Puma lacustris (also known as the lake cat) is an extinct species of Puma from the Blancan stage (from the Late Pliocene to Early Pleistocene). The type specimen is a partial fragment piece of the right side of the mandible retaining canine and cheek-teeth found in the Hagerman Fossil Beds National Monument from Idaho. The holotype was described in 1933 by Gazin who considered a smaller relative of the cougar.[1] The taxonomic identity has been uncertain at times, as a relationship (and classification) to lynxes has been purposed.[2] Additional specimens of this species of Puma have been found elsewhere in North America, such as Washington, California, Arizona, Texas, and Baja California.[3]