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
Mammalia
 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"
 Artiodactyla - Camelidae
Stenomylus gracilis2 Peterson 1907 camel
"middle" and "high"
 Artiodactyla - 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
 Artiodactyla - Moschidae
"Pseudoblastomeryx falkenbachi" = Pseudoblastomeryx advena1
"Pseudoblastomeryx falkenbachi" = Pseudoblastomeryx advena1 Matthew 1907 musk deer