Sand Gulch ( of the United States)

Where: Goshen County, Wyoming (42.0° N, 104.2° W: paleocoordinates 42.9° N, 99.2° W)

• coordinate based on political unit

When: Marsland Formation (Hemingford Group), Harrisonian (24.8 - 20.4 Ma)

• = Upper Harrison beds

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: J. H. Wahlert and R. A. Souza. 1988. Skull morphology of Gregorymys and relationships of the Entoptychinae (Rodentia, Geomyidae). American Museum Novitates 2922:1-13 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17835: authorized by John Alroy, entered by John Alroy on 07.06.1994, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• not the same as Eighteen Mile District (see)
Mammalia
 Rodentia - Geomyidae
Gregorymys riggsi Wood 1936 pocket gopher
 Perissodactyla - Rhinocerotidae
Menoceras arikarense3 Barbour 1906 rhinoceros
 Carnivora - Canidae
Desmocyon thomsoni5 Matthew 1907 bone-crushing dog
"high in section" and "south end"
Phlaocyon minor5 Matthew 1907 bone-crushing dog
 Ungulata - Merycoidodontidae
Merychyus arenarum4 Cope 1884 oreodont
Merychyus minimus4 Peterson 1907 oreodont
middle level
Merycoides longiceps1 Douglass 1907 oreodont
 Ungulata - Camelidae
Stenomylus gracilis2 Peterson 1907 camel
"Marsland"; "high"