Van Tassel (Upper) ( of the United States)

Where: Niobrara County, Wyoming (43.0° N, 104.5° W: paleocoordinates 43.9° N, 99.4° W)

• coordinate based on political unit

When: Harrisonian (24.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: F. B. Loomis. 1932. The small carnivores of the Miocene. American Journal of Science 24(142):316-329 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17854: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Rhinocerotidae
Menoceras arikarense3 Barbour 1906 rhinoceros
"southeast of Van Tassel"
 Carnivora - Amphicyonidae
Delotrochanter major n. sp.2 Hunt 2011 bear-dog
"from the vicinity of Van Tassell, Niobrara County, Wyoming."
 Carnivora - Mustelidae
"Megalictis petersoni" = Floridictis petersoni1
"Megalictis petersoni" = Floridictis petersoni1 Loomis 1932 mustelid carnivore
 Carnivora - Canidae
Phlaocyon minor5 Matthew 1907 bone-crushing dog
"Upper Harrison beds... 1.5 mi southwest of Van Tassel, low"
Phlaocyon annectens5 Peterson 1907 bone-crushing dog
"Upper Harrison beds... 3 mi east and 2 mi south of Van Tassel"
Cynarctoides harlowi1 Loomis 1932 bone-crushing dog
 Ungulata - Merycoidodontidae
Merycoides longiceps1 Douglass 1907 oreodont
 Ungulata - Tayassuidae
Lucashyus coombsae n. gen. n. sp.4
Lucashyus coombsae n. gen. n. sp.4 Prothero 2015 peccary
ACM 7035, "According to Loomis’ records, it comes from the “Harrison Formation [early late Arikareean] near Van Tassel, Wyoming.”"