Young Site ( of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W)

• Paleocoordinates: 47.1° N, 93.3° W (Wright 2013)

• coordinate based on political unit

• small collection-level geographic resolution

When: Harrison Formation, Harrisonian (24.8 - 18.5 Ma)

• "70 feet below [the] contact with Upper Harrison"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; unlithified sandstone

• "lens of fine, unconsolidated sand"

Size class: mesofossils

Primary reference: P. O. McGrew. 1937. New marsupials from the Tertiary of Nebraska. Journal of Geology 45(4):448-455 [J. Alroy/J. Alroy/W. Clyde]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17862: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Tribosphenida - Herpetotheriidae
"Peratherium youngi n. sp." = Herpetotherium youngi
"Peratherium youngi n. sp." = Herpetotherium youngi McGrew 1937 marsupial
see also Korth 1994
 Rodentia - Heteromyidae
Heteromyidae indet.
Heteromyidae indet. Gray 1868 rodent