Marsland Formation

Marsland Formation
Marsland Formation
Stratigraphic range: Neogene
	Fossil mammal from the Marsland Formation (Middle Miocene; Nebraska)
Type	Geological formation
Location
Region	Nebraska
Country	United States

Last updated July 04, 2025

Marsland Formation is a geologic formation in Nebraska preserving fossils dating back to the Neogene period.

Fossil content

Color key

Taxon	Reclassified taxon	Taxon falsely reported as present	Dubious taxon or junior synonym	Ichnotaxon	Ootaxon	Morphotaxon

Notes
Uncertain or tentative taxa are in small text; ~~crossed out~~ taxa are discredited.

Mammals

Ungulates

Ungulates reported from the Marsland Formation
Genus	Species	Presence	Material	Notes	Images
Mediochoerus	M. johnsoni	Dawes County, Nebraska (upper part of the formation).^[1]	A skull^[1]	A merycoidodontid.
Menoceras	M. barbouri	Morrill & Box Butte counties, Nebraska.^[2]^[3]	Skulls.^[2]^[3]	A rhinoceros.
	M. falkenbachi	Morrill County, Nebraska (lower part of the formation).^[2]	Skulls.^[2]	Synonymized with M. barbouri.^[4]
	M. marslandensis	Box Butte County, Nebraska (upper part of the formation).^[3]	Skulls.^[3]	Synonymized with M. barbouri.^[4]

Reptiles

Testudines

Testudines reported from the Marsland Formation
Genus	Species	Presence	Material	Notes	Images
Macroclemys	M. schmidti	Box Butte County, Nebraska.^[5]	A fragmentary juvenile skull & an adult skull.^[5]	A snapping turtle.

References

1 2 Schultz, C. Bertrand (Charles Bertrand); Falkenbach, Charles H. (1941). "Ticholeptinae : a new subfamily of oreodonts". Bulletin of the AMNH. 79 (1): 4–105. hdl:2246/379.
1 2 3 4 Tanner, Lloyd (1972-07-01). "A New Species of Menoceras from the Marsland Formation of Nebraska". Bulletin of the University of Nebraska State Museum.
1 2 3 4 Tanner, Lloyd (1969-01-01). "A New Rhinoceros from the Nebraska Miocene". Bulletin of the University of Nebraska State Museum.
1 2 Prothero, Donald R. (2005-03-07). The Evolution of North American Rhinoceroses. Cambridge University Press. p. 62. ISBN 978-0-521-83240-3.
1 2 Whetstone, Kenneth N. (1978). "Additional Record of the Fossil Snapping Turtle Macroclemys schmidti from the Marsland Formation (Miocene) of Nebraska with Notes on Interspecific Skull Variation within the Genus Macroclemys" . Copeia. 1978 (1): 159–162. doi:10.2307/1443841. ISSN 0045-8511. JSTOR 1443841.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.

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[:0-1] 1 2 Schultz, C. Bertrand (Charles Bertrand); Falkenbach, Charles H. (1941). "Ticholeptinae : a new subfamily of oreodonts". Bulletin of the AMNH. 79 (1): 4–105. hdl:2246/379.

[:1-2] 1 2 3 4 Tanner, Lloyd (1972-07-01). "A New Species of Menoceras from the Marsland Formation of Nebraska". Bulletin of the University of Nebraska State Museum.

[:3-3] 1 2 3 4 Tanner, Lloyd (1969-01-01). "A New Rhinoceros from the Nebraska Miocene". Bulletin of the University of Nebraska State Museum.

[:4-4] 1 2 Prothero, Donald R. (2005-03-07). The Evolution of North American Rhinoceroses. Cambridge University Press. p. 62. ISBN 978-0-521-83240-3.

[:2-5] 1 2 Whetstone, Kenneth N. (1978). "Additional Record of the Fossil Snapping Turtle Macroclemys schmidti from the Marsland Formation (Miocene) of Nebraska with Notes on Interspecific Skull Variation within the Genus Macroclemys" . Copeia. 1978 (1): 159–162. doi:10.2307/1443841. ISSN 0045-8511. JSTOR 1443841.

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