Protolabis heterodontus

Protolabis heterodontus is an extinct species of camelid, a member of the family Camelidae in the genus Protolabis. It was first described by Cope in 1874 and has since been placed in the genus Protolabis. The database dates the species from the Aquitanian to the Zanclean stage, between about 23.04 and 4.7 million years ago, from 18 fossil occurrences, collected in the United States (Nebraska, South Dakota, Nevada, Wyoming, Colorado) and Honduras. Its ecospace record gives a terrestrial, ground-dwelling way of life and a browsing diet, values the database takes from the wider Camelidae clade, since fossils of the species itself do not show how it fed. The Wikipedia article on Protolabis, read for the genus, describes it as an extinct genus of camelid endemic to North America. The GBIF backbone taxonomy lists Protolabis heterodontus as an accepted species of the family Camelidae, which is the second source for the name.