Temporal range: Pleistocene–0.011
|Skeleton in Royal Ontario Museum|
Cervalces scotti, the elk moose or stag-moose, is an extinct species of large moose that lived in North America during the Late Pleistocene epoch. It had palmate antlers that were more complex than those of a moose and a muzzle more closely resembling that of a typical deer It is the only known North American member of the genus Cervalces.
It was as large as the moose, with an elk-like head, long legs, and palmate antlers that were more complex and heavily branching than the moose. Cervalces scotti reached 2.5 m (8.2 ft) in length and a weight of 708.5 kg (1,562 lb).  The stag-moose resided in North America during an era with other megafauna such as the woolly mammoth, ground sloth, long horn bison, and saber toothed cat. The species became extinct approximately 11,500 years ago, toward the end of the most recent ice age, as part of a mass extinction of large North American mammals.
The first evidence of Cervalces scotti found in modern times was discovered at Big Bone Lick, Kentucky by William Clark, circa 1805. A more complete skeleton was found in 1885 by William Barryman Scott in New Jersey. Mummified remains have also been found. The most complete known Cervalces skull was dredged from a pond by Ralph Bender in Kendaville Indiana.
The ancestor of Cervalces scotti is believed to have evolved in the Eurasian continent. Cervalces scotti is believed to be related to the Cervalces latifrons, another similar species that became extinct around the same time as Cervalces scotti. It shared the spruce parkland ecosystem with other pleistocene megafauna, such as the caribou, moose, the woodland musk-ox, and the giant beaver. in a range from southern Canada to Arkansas and from Iowa to New Jersey. As the glaciers retreated, moose (which had crossed the Bering land bridge from Asia) may have populated the habitat of Cervalces scotti and caused its extinction by competition. Although there is no paleontological evidence that it was associated with humans, other theories for its extinction have been proposed. Notably, there is speculation that hunting by newly arrived humans caused the extinction of the Cervalces scotti and other large mammals. Additionally, some have proposed a sudden extinction by disease, brought by small mammals in association with humans. The oldest known fossil of Cervalces scotti was found in the bed of the Skunk River in Iowa, with the specimen dating back approximately 30,000 years ago. The area in which the fossil was found and the date implies that Cervalces scotti lived before a massive ice sheet covered the area in which it inhabited, which could also be a possible cause of its extinction. Since the stag-moose resides in a woodland habitat, climate change and loss of natural pastures also could have played a role in its extinction.
Cervalces scotti probably lived in a narrow geographic range, characterized by a spruce-dominant mixed conifer and deciduous wet woodland which may have made it more vulnerable to extinction. Remains of Cervalces scotti found in modern-day Ohio have suggested that it and Homo sapiens could have possibly interacted. Fossils of both Cervalces scotti and other large extinct mammals in the area suggest that it have been a frequent target of early human hunters.
Cervalces scotti, like several other members of its genus, probably lived in marshes and bogs, as well as spruce-taiga floral communities. There were also surroundings ranging from tundra–mixed coniferous forests to deciduous woodlands. These sedges and willows may have not have been suitable food products, but they provide an imagery of the ecology of the stag-moose. The change in flora and fauna due to complete deglaciation probably also affected the living conditions of the stag-moose in states like Iowa and Wisconsin, where the stag-moose was found at more than 20 sites. None of these sites, however, has any evidence that the stag-moose interacted with humans, furthering evidence that the extinction of the stag-moose is not comparable to that of large herbivores that were greatly affected by hunting. The stag moose reproduced more often than megaherbivores, and so the hypothesis is that the stag-moose's disappearance is linked to the emergence of the "true moose" (Alces alces), instead. Another reason for extinction could be the competitions of several herbivorous artiodactyls, like the Bison in the new grassland ecosystem which replaced the spruce forest environment. 
- "Stag Moose (Cervalces scotti)". The Academy of Natural Sciences. Retrieved 2007-03-03.
- "AMNH Bestiary." AMNH Bestiary. American Museum of Natural History, n.d. Web. 23 Oct. 2014
- Raia, Pasquale, Federico Passaro, Francesco Carotenuto, Leonardo Maiorino, Paolo Piras, Luciano Teresi, Shai Meiri et al. "Cope’s rule and the universal scaling law of ornament complexity." The American Naturalist 186, no. 2 (2015): 165-175.
- Strauss, Bob. "Stag Moose - Facts and Figures". Thoughtco.com. Retrieved 2018-06-04.
- "(in Spanish)". Laignoranciadelconocimiento.blogspot.com.es. 2011-10-13. Retrieved 2018-06-04.
- "Cervalces Scotti." Maxilla & Mandible. N.p., n.d. Web. 23 Oct. 2014. <http://maxillaandmandible.com/portfolio/cervalces-scotti/>.
- "Stag-moose". Illinois State Museum. Retrieved 2007-03-03.
- Stevens, William K. (April 29, 1997). "Disease Is New Suspect in Ancient Extinctions". The New York Times. Retrieved 2007-03-04.
- Guthrie, R.D. (1990). Frozen Fauna of the Mammoth Steppe: The Story of Blue Babe. University of Chicago Press. ISBN 9780226311234. Retrieved 2015-06-12.
- End of the Pleistocene: elk-moose (Cervalces) and caribou (Rangifer) in Wisconsin Charles A. Long Christopher J. Yahnke Journal of Mammalogy, Volume 92, Issue 5, 14 October 2011, Pages 1127–1135, https://doi.org/10.1644/10-MAMM-A-395.1
- Bower, Bruce. "America's Talk: The Great Divide." Science News 137.23 (1990): 360-362. JSTOR. Web
- George A. Feldhamer; Joseph A. Chapman; Bruce Carlyle Thompson (1982). "Moose". Wild Mammals of North America: Biology, Management, and Conservation. Johns Hopkins University Press. p. 931. Retrieved 2007-03-04.
- "Stag-Moose". Bestiary. American Museum of Natural History. Retrieved 2007-03-03.
- Sharon Levy (2006). "Mammoth Mystery". Natural Resources Defense Council. Retrieved 2007-03-04.
- "Oldest known stag-moose fossil resides in Iowa". radioiowa.com. Retrieved 2015-06-12.
- Strauss, Bob. "Stag Moose (Cervalces Scotti)". About. N.p., n.d. Web. 24 October 2014.
- Blaine W.Schubert, Russell Wm.Graham, H.GregoryMcDonald, Eric C.Grimm, Thomas W.Stafford, Jr. Latest Pleistocene paleoecology of Jefferson's ground sloth (Megalonyx jeffersonii) and elk-moose (Cervalces scotti) in northern Illinois Quaternary Research Volume 61, Issue 2, March 2004, Pages 231-240
- Mayhood, Kevin. "Solving a 10,000-year-old mystery - Researchers study clues to figure out what killed giant ice age moose." Columbus Dispatch, The (OH) 16 Sep. 2008, Home Final, News - Science: 04B. NewsBank. Web. 23 Oct. 2014.
- Levy, Sharon. "Clashing with Titans." BioScience 56.4 (2006): 292. Web.
- McDonald, H. Gregory. "New Records of the Elk-moose Cervalces scotti from Ohio". American Midland Naturalist 122.2 (1989): 349-356. JSTOR. Web.
- O'Gorman, Jodie A. and Lovis, William A. "Before Removal: An Archaeological Perspective on the Southern Lake Michigan Basin". Midcontinental Journal of Archaeology 31.1: 24. Web
- Long, Charles A. and Yahnke, Christopher J. "End of Pleistocene: elk-moose (Cervalces) and caribou (Rangifer) in Wisconsin." Journal of Mammalogy 92.5 (2011): 1127–1133. Web.