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 - 18.5 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
 Carnivora - Amphicyonidae
Delotrochanter major n. sp.1 Hunt 2011 bear-dog
"from the vicinity of Van Tassell, Niobrara County, Wyoming."
 Carnivora - Mustelidae
"Paroligobunis petersoni n. sp." = Floridictis petersoni
"Paroligobunis petersoni n. sp." = Floridictis petersoni Loomis 1932 mustelid carnivore
"three miles southeast of Van Tassel, Wyoming, in beds of Upper Harrison age"; this is close to Niobrara Canyon
 Carnivora - Canidae
"Pachycynodon harlowi n. sp." = Cynarctoides harlowi, Phlaocyon annectens5, Phlaocyon minor5
"Pachycynodon harlowi n. sp." = Cynarctoides harlowi Loomis 1932 bone-crushing dog
3 mi SE of Van Tassel "in the Upper Harrison beds"
Phlaocyon annectens5 Peterson 1907 bone-crushing dog
"Upper Harrison beds... 3 mi east and 2 mi south of Van Tassel"
Phlaocyon minor5 Matthew 1907 bone-crushing dog
"Upper Harrison beds... 1.5 mi southwest of Van Tassel, low"
 Artiodactyla - Merycoidodontidae
"Phenacocoelus stouti" = Merycoides stouti4
"Phenacocoelus stouti" = Merycoides stouti4 Schultz and Falkenbach 1950 oreodont
Niobrara Co. "near Van Tassel" implicitly of "lower Marsland" age
 Artiodactyla - Tayassuidae
Lucashyus coombsae n. gen. n. sp.3
Lucashyus coombsae n. gen. n. sp.3 Prothero 2015 peccary
ACM 7035, "According to Loomis’ records, it comes from the “Harrison Formation [early late Arikareean] near Van Tassel, Wyoming.”"
 Perissodactyla - Rhinocerotidae
Menoceras arikarense2 Barbour 1906 rhinoceros
"southeast of Van Tassel"