Camelops
Camelops | |
---|---|
Mounted skeleton of Camelops hesternus in the George C. Page Museum, Los Angeles | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Artiodactyla |
Family: | Camelidae |
Subfamily: | Camelinae |
Tribe: | Camelini |
Genus: | †Camelops Leidy, 1854 |
Species | |
†C. kansanus Leidy, 1854
†C. hesternus Leidy, 1873 (type) |
Camelops is an extinct genus of camels that lived in North and Central America, ranging from Alaska to Honduras,[1] from the middle Pliocene to the end of the Pleistocene. It is more closely related to the Old World dromedary and bactrian and wild bactrian camels than to the New World guanaco, vicuña, alpaca and llama; making it a true camel of the Camelini tribe.[1][2] Its name is derived from the Ancient Greek κάμηλος (cámēlos, "camel")[3] and ὄψ (óps, "face"),[4] i.e. "camel-face".
Taxonomy and evolution
The genus Camelops first appeared during the middle
During Pleistocene warm periods, a smaller morph of Camelops inhabited Alaska and northern Yukon. These specimens date to around 50–45 thousand years ago, and seem to have been extirpated from the area after this time, similar to the contemporaneous mastodon, the ground sloth Megalonyx, and the giant beaver Castoroides. The skull of a Camelops specimen was found above the Glenns Ferry Formation in present-day Idaho in a thick layer of coarse gravel known as the Tauna Gravels. Above this layer of gravel is another layer of fine river channel sands, where the skull was found. The age of this fossil is as young as 2 million years old and perhaps even younger, which can be inferred because it is younger than the other fossils found at the Hagerman Fossil Beds National Monument.[7]
During the late
Some scientific publications have used the informal names "Western Camel" and "Yesterday's Camel" for Camelops.[9][10]
Description
Because soft tissues are generally not preserved in the
C. hesternus had legs 20% longer than that of the dromedary, and was about 2.3 m (7 ft 7 in) tall at the shoulder and weighed about 1,000 kg (2,200 lb).[12]
Paleobiology
The species ranged widely from Alaska in the north to
Plant remains found in the teeth of the Rancho La Brea C. hesternus fossils further reveal that rather than being limited to grazing, this species likely ate mixed species of plants, including coarse shrubs growing in coastal southern California. Camelops probably could travel long distances, similar to modern camel species. Whether or not Camelops could survive for long periods without water, as with extant camels, is still unknown; this may have been an adaptation that occurred much later, after camelids migrated to Asia and Africa.[14]
The
Extinction
The last species of Camelops are hypothesized to have disappeared as a result of the
At many of these Camelops sites, no fossils have been found of carcasses that were evidently processed, but rather small fragments and pieces of remains. Researchers originally thought that Camelops species were in fact hunted and butchered by early humans in North America because of these reasons: the fragmenting of bones into shapes that look like tools, damage or weathering of the “working” edge of said tools, having attributes that were similar to the making of chopping tools, and scarred fragments from possible chopping tools.[17] Further examination showed, though, that these assumptions were misguided, and that while humans did coexist and associate with Camelops, human use has yet to be completely proven as the sole cause of extinction.[17]
See also
- Aepycamelus
- Eulamaops
- Oxydactylus
- Poebrotherium
- Procamelus
- Protylopus
- Stenomylus
- Syrian camel, an extinct species that reached at least 9 feet (2.7 m) tall at the shoulder
- Pleistocene megafauna
- Snowmastodon Project
References
- ^ PMID 26037535.
- ^ Saitou, Naruya; Shokat, Shayire (2017). "DNA Analyses of Camels". Journal of Arid Land Studies. 26 (4): 223–226.
- Perseus Project
- Perseus Project
- ^ a b c "Camelops". Anza-Borrego Desert State Park Paleontology Society. Archived from the original on 2011-09-04.
- ^ a b Hutchinson, Jon (2012-08-14). "Camel Country: Where have all our camelops gone?". Verde Independent. Archived from the original on 2019-07-07. Retrieved 2017-06-02.
- ^ National Park Service. "Camelops". Hagerman Fossil Beds. U.S. Department of the Interior. Archived from the original on 2014-07-11. Retrieved 2012-10-26.
- University of Colorado at Boulder. Archived from the originalon 2010-06-10. Retrieved 2009-05-01.
- .
- .
- ^ "Evolutionary History | Camels". blogs.lt.vt.edu. Archived from the original on 2019-04-30. Retrieved 2018-05-29.
- ^ Anthony J. Stuart, 2021, Vanished Giants: The Lost World of the Ice Age, "6.17 Yesterday's Camel: Camelops Hesternus", p.99, University of Chicago Press
- ISBN 9780020935506.
- ^ Museum, San Diego Natural History. "San Diego Natural History Museum Fossil Mysteries Field Guide: Extinct Camel". Sdnhm.org. Archived from the original on 6 July 2014. Retrieved 10 November 2017.
- ^ "The US Army's Camel Corps by C. F. Eckhardt". Archived from the original on 2022-01-20. Retrieved 2021-12-03.
- S2CID 85102271.
- ^ S2CID 129762421. Archived from the original(PDF) on 2014-03-09. Retrieved 2012-10-26.