Marsland Formation

|M. johnsoni

| Dawes County, Nebraska (upper part of the formation).{{Cite journal |last1=Schultz |first1=C. Bertrand (Charles Bertrand) |last2=Falkenbach |first2=Charles H. |date=1941 |title=Ticholeptinae : a new subfamily of oreodonts. |url=https://digitallibrary.amnh.org/handle/2246/379 |journal=Bulletin of the AMNH |language=en-US |volume=79 |issue=1 |pages=4–105|hdl=2246/379 }}

|A skull

| A merycoidodontid.

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|M. barbouri

|Morrill & Box Butte counties, Nebraska.{{Cite journal |last=Tanner |first=Lloyd |date=1972-07-01 |title=A New Species of Menoceras from the Marsland Formation of Nebraska |url=https://digitalcommons.unl.edu/museumbulletin/116 |journal=Bulletin of the University of Nebraska State Museum}}{{Cite journal |last=Tanner |first=Lloyd |date=1969-01-01 |title=A New Rhinoceros from the Nebraska Miocene |url=https://digitalcommons.unl.edu/museumbulletin/52 |journal=Bulletin of the University of Nebraska State Museum}}

|Skulls.

|A rhinoceros.

|File:Menoceras NT small.jpg

|style="background:#E6E6E6;"|Morrill County, Nebraska (lower part of the formation).

|style="background:#E6E6E6;"|Skulls.

|style="background:#E6E6E6;"|Synonymized with M. barbouri.{{Cite book |last=Prothero |first=Donald R. |url=https://books.google.com/books?id=yXhHCt8Ml7YC&dq=menoceras+marslandensis&pg=PA19 |title=The Evolution of North American Rhinoceroses |date=2005-03-07 |publisher=Cambridge University Press |isbn=978-0-521-83240-3 |pages=62 |language=en}}

|style="background:#E6E6E6;"|File:Menoceras barbouri (fossil rhinoceros) (Marsland Formation, Middle Miocene; Bridgeport Quarries, near Bridgeport, Nebraska, USA) 1 (32849205355).jpg

|style="background:#E6E6E6;"|Box Butte County, Nebraska (upper part of the formation).

|style="background:#E6E6E6;"|Skulls.

|style="background:#E6E6E6;"|Synonymized with M. barbouri.

|style="background:#E6E6E6;"|File:Menoceras barbouri (fossil rhinoceros) (Marsland Formation, Middle Miocene; Bridgeport Quarries, near Bridgeport, Nebraska, USA) 5 (32808353546).jpg

|M. schmidti

| Box Butte County, Nebraska.{{Cite journal |last=Whetstone |first=Kenneth N. |date=1978 |title=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 |url=https://www.jstor.org/stable/1443841 |journal=Copeia |volume=1978 |issue=1 |pages=159–162 |doi=10.2307/1443841 |jstor=1443841 |issn=0045-8511|url-access=subscription }}

|A fragmentary juvenile skull & an adult skull.

| A snapping turtle.

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