Eighteen Mile District ( 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: Harrisonian (24.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy]more details

PaleoDB collection 17780: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• not the same as Sand Gulch (see), but 2.5 mi SW of Van Tassel according to Schultz and Falkenbach 1950 and possibly confused with that locality by other authors
 Carnivora - Amphicyonidae
Daphoenodon falkenbachi n. sp.3 Hunt 2002 bear-dog
"Upper Harrison beds, 18-Mile District"
Adilophontes brachykolos n. gen. n. sp.3 Hunt 2002 bear-dog
"Upper Harrison beds"
 Carnivora - Canidae
Desmocyon thomsoni Matthew 1907 bone-crushing dog
"Upper Harrison beds... 18 mi southeast of Lusk, middle brown sand"; "high brown sand"; and "high in section"
Cynarctoides luskensis n. sp. Wang et al. 1999 bone-crushing dog
Upper Harrison Beds
Cynarctoides acridens Barbour and Cook 1914 bone-crushing dog
"below high brown sand"
 Ungulata - Merycoidodontidae
"Merycoides harrisonensis" = Paramerychyus harrisonensis1 Peterson 1907 oreodont
Merychyus arenarum4 Cope 1884 oreodont
middle and high part of section
Merychyus minimus4 Peterson 1907 oreodont
lowest, middle, and upper part of section
 Ungulata - Camelidae
Stenomylus gracilis2 Peterson 1907 camel
"middle" and "high"
 Ungulata - Moschidae
"Pseudoblastomeryx falkenbachi" = Pseudoblastomeryx advena1
"Pseudoblastomeryx falkenbachi" = Pseudoblastomeryx advena1 Matthew 1907 musk deer