Meniscotherium

Meniscotherium; Temporal range: Early Eocene to Late Eocene
	Skeleton
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Family:	†Phenacodontidae
Subfamily:	†Meniscotheriinae
Genus:	†Meniscotherium; Cope, 1874
Species
	M. tapiacitum; M. chamense;

Meniscotherium is an extinct genus of dog-sized mammal which lived 54–38 million years ago. It was a herbivore and had hooves. Fossils have been found in Utah, New Mexico. and Colorado. Many individuals have been found together, indicating that it lived in groups.[1]

Restoration of M. chamense

Body mass in M. chamense is estimated to be 5–17 kg, making it about the size of a small dog.[2]

A 2014 cladistic analysis places it within stem perissodactyls.[3]

References

Thomas E. Williamson and Spencer G. Lucas. 1992. Meniscotherium (Mammalia, "Condylarthra") from the Paleocene-Eocene of western North America. Bulletin, New Mexico Museum of Natural History and Science. Albuquerque. 72 pp.
Dirks W.; Anemone R. L.; Holroyd P. A.; Reid D. J. (2009). "Phylogeny, Life History and the Timing of Molar Crown Formation in Two Archaic Ungulates, Meniscotherium and Phenacodus (Mammalia, 'Condylarthra')". Comparative Dental Morphology. Frontiers of Oral Biology. 13: 3–8. doi:10.1159/000242381. ISBN 978-3-8055-9229-1. PMID 19828961.
Cooper, L. N.; Seiffert, E. R.; Clementz, M.; Madar, S. I.; Bajpai, S.; Hussain, S. T.; Thewissen, J. G. M. (2014-10-08). "Anthracobunids from the Middle Eocene of India and Pakistan Are Stem Perissodactyls". PLOS ONE. 9 (10): e109232. Bibcode:2014PLoSO...9j9232C. doi:10.1371/journal.pone.0109232. PMC 4189980. PMID 25295875.

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[1] Thomas E. Williamson and Spencer G. Lucas. 1992. Meniscotherium (Mammalia, "Condylarthra") from the Paleocene-Eocene of western North America. Bulletin, New Mexico Museum of Natural History and Science. Albuquerque. 72 pp.

[2] Dirks W.; Anemone R. L.; Holroyd P. A.; Reid D. J. (2009). "Phylogeny, Life History and the Timing of Molar Crown Formation in Two Archaic Ungulates, Meniscotherium and Phenacodus (Mammalia, 'Condylarthra')". Comparative Dental Morphology. Frontiers of Oral Biology. 13: 3–8. doi:10.1159/000242381. ISBN 978-3-8055-9229-1. PMID 19828961.

[Cooper2014-3] Cooper, L. N.; Seiffert, E. R.; Clementz, M.; Madar, S. I.; Bajpai, S.; Hussain, S. T.; Thewissen, J. G. M. (2014-10-08). "Anthracobunids from the Middle Eocene of India and Pakistan Are Stem Perissodactyls". PLOS ONE. 9 (10): e109232. Bibcode:2014PLoSO...9j9232C. doi:10.1371/journal.pone.0109232. PMC 4189980. PMID 25295875.