Bootherium

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Extinct genus of bovid mammal

title: "Bootherium" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["prehistoric-bovids", "prehistoric-mammals-of-north-america", "pleistocene-mammals-of-north-america", "pleistocene-artiodactyla", "pleistocene-species-extinctions", "taxa-named-by-joseph-leidy", "fossil-taxa-described-in-1852", "taxa-named-by-richard-harlan", "monotypic-prehistoric-artiodactyla-genera"] description: "Extinct genus of bovid mammal" topic_path: "general/prehistoric-bovids" source: "https://en.wikipedia.org/wiki/Bootherium" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Extinct genus of bovid mammal ::

Bootherium (Greek: "ox" (boos), "beast" (therion)) is an extinct bovid genus from the Middle to Late Pleistocene of North America which contains a single species, Bootherium bombifrons. Vernacular names for Bootherium include Harlan's muskox, woodox, woodland muskox, helmeted muskox, or bonnet-headed muskox.

Taxonomy

::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/69/Bootherium_bombifrons.JPG" caption="Skull"] ::

Symbos was formerly thought to be a separate genus, but is now known to be synonymous. Its closest living relative is the muskox (Ovibos moschatus), from which it diverged around 3 million years ago. It is also closely related to the contemporaneous extinct genus Euceratherium.

Description

Unlike today's Arctic and tundra-adapted muskoxen, with their long, shaggy coats, Bootherium was physically adapted to a range of less frigid climates, and appears to have been the only species of muskox to have evolved in and remain restricted to the North American continent (the Arctic muskox's range is circumpolar, and includes the northern reaches of Eurasia as well as North America). Bootherium was significantly taller and leaner than muskoxen found today in Arctic regions. Bootherium were estimated to weigh around 423.5 kg. Other differences were a thicker skull and considerably longer snout. The horns of Bootherium were situated high on the skull, with a downward curve and were fused along the midline of the skull, unlike tundra muskoxen whose horns are separated by a medial groove.

Distribution

Bootherium was one of the most widely distributed muskox species in North America during the Pleistocene epoch. Fossils have been documented from as far north as Alaska to Alberta, Montana, California, Utah, Texas, Missouri, Indiana, Ohio, Michigan, Oklahoma, Virginia, North Carolina, and New Jersey. The species went into decline, and eventual extinction, approximately 11,000 years ago, at the end of the last Ice Age.

Notes

References

"Glossary. American Museum of Natural History".
McKenna & Bell, 1997, p. 442.
[http://www.ansp.org/museum/jefferson/otherFossils/bootherium.php The Academy of Natural Sciences] {{webarchive. link. (April 7, 2008)
[http://www.erudit.org/revue/GPQ/2003/v57/n2/011316ar.html Helmeted Muskox (''Bootherium bombifrons'') from Near Fort Saskatchewan, Alberta: Dating Evidence for Redeposition in Late Pleistocene Alluvium]
(1999). "War Zones and Game Sinks in Lewis and Clark's West". [[Conservation Biology (journal).
(1989). "Autochthonous North American Musk Oxen Bootherium, Symbos, and Gidleya (Mammalia: Artiodactyla: Bovidae)". Smithsonian Contributions to Paleobiology.
(January 2016). "Mitogenome of the extinct helmeted musk ox, Bootherium bombifrons". [[Mitochondrial DNA (journal).
(December 2018). "Molecular resolution to a morphological controversy: The case of North American fossil muskoxen Bootherium and Symbos". [[Molecular Phylogenetics and Evolution]].
(1 August 2010). "Clarification of the taxonomic relationship of the extant and extinct ovibovids, Ovibos, Praeovibos, Euceratherium and Bootherium". [[Quaternary Science Reviews]].
[https://archive.today/20121218002725/http://museumu03.museumwww.naturkundemuseum-berlin.de/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=44580 Paleobiology Database: Bootherium bombifrons]
(1991). "New paleoecological and paleoethological information on the extinct helmeted muskoxen from Alaska". Annales Zoologici Fennici.
(2 May 2011). "Description of fossil muskoxen and relative abundance of Pleistocene megafauna in central Alberta". [[Canadian Journal of Earth Sciences]].
(January 2006). "Stratigraphic and geochronologic contexts of mammoth (Mammuthus) and other Pleistocene fauna, Upper Missouri Basin (northern Great Plains and Rocky Mountains), U.S.A.". [[Quaternary International]].
(2017). "Shorelines and Vertebrate Fauna of Pleistocene Lake Bonneville, Utah, Idaho, and Nevada". Geology of the Intermountain West.
(May 1946). "Recent and Pleistocene Mammalian Fauna of Brazos County, Texas". [[Journal of Mammalogy]].
(Autumn 1973). "Late Pleistocene Palynology and Biogeography of the Western Missouri Ozarks". [[Ecological Monographs]].
(1 January 1991). "New Records of Harlan's Muskox (Bootherium bombifrons) and an Associated Fauna from the Late Pleistocene of Indiana". [[Proceedings of the Indiana Academy of Science]].
(18 October 2024). "The Woodland Muskox Bootherium bombifrons (Artiodactyla, Bovidae) from Hebron, Licking County, Ohio, USA and its Paleoecology in the Great Lakes Region". The Ohio Journal of Science.
"Pleistocene proboscidean sites in Michigan: New records and an update on published sites.". Utah Geological Association.
(1 May 1967). "Fossil Mammals and Pollen in a Late Pleistocene Deposit at Saltville, Virginia". [[Journal of Paleontology]].

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