Camelops

Camelops is an extinct genus of camel that lived in North and Central America from the middle Pliocene (from around 4-3.2 million years ago) to the end of the Pleistocene (around 13-12,000 years ago). It is more closely related to living camels than to lamines (llamas, alpacas, vicuñas, and guanacos), making it a true camel of the Camelini tribe. Its name is derived from the Ancient Greek κάμηλος (cámēlos, "camel") and ὄψ (óps, "face"), i.e. "camel-face". Camelops lived across Western North America, ranging from the Pacific Coast to the Great Plains, southwards to Honduras and northwards to Alaska. Camelops became extinct as part of the end-Pleistocene extinction event, along with most large mammals across the Americas. The extinctions followed the arrival of humans to the Americas, and evidence has been found indicating that humans butchered Camelops, suggesting that hunting may have been a factor in its extinction.

Taxonomy and evolution

History of research

Camelops was first named by Joseph Leidy in 1854, based on a partial maxilla (upper jawbone), that was found in a gravel drift somewhere in the Kansas Territory, with Leidy naming the type species Camelops kansanus in the same publication based on the maxilla. Later authors have judged that while the jawbone undoubtedly represents Camelops, it is too fragmentary to be diagnostic to species, making C. kansanus a nomen dubium. Later in 1874, Leidy named the species Camelops hesternus, based on teeth found in a gravel deposit in Arroyo Las Positas in Livermore Valley, Alameda County in the southern Bay Area of California.