Stenomylus gracilis

Stenomylus gracilis is an extinct species of camelid, a member of the family Camelidae now placed in the genus Stenomylus. It was first described under another genus name by Peterson in 1907, and the Paleobiology Database records it as an extinct species of the order Artiodactyla, the even-toed ungulates. The database dates the species from the Chattian to the Burdigalian stage of the late Oligocene, between about 23.1 and 16.3 million years ago, from 12 fossil occurrences, found in the United States (Nebraska, New Mexico, Wyoming). Its ecospace record gives a terrestrial, ground-dwelling way of life and a browsing or grazing diet, values taken from the wider family, since fossils of the species itself do not show how it fed. The GBIF backbone taxonomy lists Stenomylus gracilis as an accepted species of the family Camelidae, which is the second source for the name.