Metamynodon Layer (1892 AMNH Collection) (Oligocene of the United States)
Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 44.4° N, 94.3° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: lower Scenic Member (Brule Formation), Orellan (33.9 - 33.3 Ma)
Environment/lithology: terrestrial
Reposited in the AMNH
Primary reference: H. F. Osborn and J. L. Wortman. 1894. Fossil mammals of the Lower Miocene White River beds. Collection of 1892. Bulletin of the American Museum of Natural History 6(7):199-228 [J. Alroy/J. Alroy/M. Carrano]more details
PaleoDB collection 17141: authorized by John Alroy, entered by John Alroy on 18.10.1995, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
• based on Sinclair 1924, Clark and Kietzke 1967, and Bjork and Macdonald 1981, "Metamynodon Channels" refers to any sandstone in the entire Scenic Member; however, this particular collection appears to represent a narrow interval in the basal Scenic of southwestern Badlands
list of Bjork and Macdonald 1981 spans the entire member and apparently is incomplete; following i.d.s cannot be matched to the AMNH list: Protapirus sp. Agriochoerus sp. "Perchoerus sp." - described by Lemley 1971
type of Heptacodon occidentale is from the "Metamynodon sandstones"; see Scott 1940
list of Bjork and Macdonald 1981 spans the entire member and apparently is incomplete; following i.d.s cannot be matched to the AMNH list: Protapirus sp. Agriochoerus sp. "Perchoerus sp." - described by Lemley 1971
type of Heptacodon occidentale is from the "Metamynodon sandstones"; see Scott 1940
Show authors, comments, and common names
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Metamynodon planifrons Scott and Osborn 1887 odd-toed ungulate erroneously listed as "M. planiceps" in a table; type of "M. rex" is from Pine Ridge Agency, see Troxell 1921c
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Hyracodon sp. Leidy 1856 odd-toed ungulate | |
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Mesohippus exoletus4 Cope 1874 anchitheriine horse one of the "M. bairdi" specimens later named as the type of "M. trigonostylus" by Osborn 1918; said to be from the "Metamynodon sandstones in the Middle Oreodon beds" by Scott 1941; not clear if M. bairdi sensu stricto is present
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"Merycoidodon culbertsoni" = Merycoidodon culbertsonii1
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Perchoerus nanus3 Marsh 1894 peccary AMNH 1200; "Metamynodon channels, Big Badlands, Cheyenne River, SD"
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Hoplophoneus primaevus Leidy and Owen 1851 false sabre-tooth | |