Van Tassel (Lower) ( 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: T. H. V. Rich. 1981. Origin and History of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America. Bulletin of the American Museum of Natural History 171(1):1-116 [J. Alroy/J. Alroy/P. Mannion]more details
PaleoDB collection 17853: authorized by John Alroy, entered by John Alroy on 26.03.1995
Creative Commons license: CC BY (attribution)
Taxonomic list
• older records for "Converse Co." are actually in Niobrara Co., see Schultz and Falkenbach 1949 p. 98
oreodonts of Loomis 1923 are from "directly behind... Van Tassel... in the "Lower Harrison... 30 feet below the contact with the Upper Harrison beds"; Loomis believes this to be a single horizon, although the material is from a 1/2 square mile area
this is just a few miles NW of Niobrara Canyon
status unclear: Euhapsis luskensis Xu 1996: "Lusk 280-2282, 3 miles North of Van Tassel... late Arikareean"
oreodonts of Loomis 1923 are from "directly behind... Van Tassel... in the "Lower Harrison... 30 feet below the contact with the Upper Harrison beds"; Loomis believes this to be a single horizon, although the material is from a 1/2 square mile area
this is just a few miles NW of Niobrara Canyon
status unclear: Euhapsis luskensis Xu 1996: "Lusk 280-2282, 3 miles North of Van Tassel... late Arikareean"
Show authors, comments, and common names
| Mammalia | |
Amphechinus ellicottae n. sp.5
Amphechinus ellicottae n. sp.5 Martin and Lim 2004 hedgehog "one-half mile... north of Van Tassell... Harrison Formation"
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Daphoenodon superbus1 Peterson 1907 bear-dog PU specimen from Harrison Fm. sensu stricto "near Van Tassel, Wyoming"
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"Oligobunis vantasselensis" = Promartes vantasselensis4
"Oligobunis vantasselensis" = Promartes vantasselensis4 Loomis 1932 mustelid carnivore catalogue number indicates this is from the 1920 collections reported by Loomis 1923
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"Promerycochoerus vantasselensis n. sp." = Promerycochoerus carrikeri6, "Ticholeptus petersoni n. sp." = Hypsiops brachymelis3, "Merychyus crabilli" = Merychyus calaminthus8, "Merychyus harrisonensis n. sp." = Paramerychyus harrisonensis6
"Promerycochoerus vantasselensis n. sp." = Promerycochoerus carrikeri6 Peterson 1907 oreodont "Vantassel Creek, Converse County"; referred specimens described by Loomis 1923, and also Schultz and Falkenbach 1950 "near Van Tassel... in direct association" with new specimen of "H. brachymelis"; same as specimen of Schultz and Falkenbach 1949 associated with "'Ticholeptos' petersoni"
"Ticholeptus petersoni n. sp." = Hypsiops brachymelis3 Douglass 1907 oreodont referred specimens from "type area" and "S. E. of Van Tassel" listed by Schultz and Falkenbach 1950
"Merychyus crabilli" = Merychyus calaminthus8 Jahns 1940 oreodont "near Van Tassell" in Niobrara Co.
"Merychyus harrisonensis n. sp." = Paramerychyus harrisonensis6 Peterson 1907 oreodont "Lower Harrison beds on Vantassel Creek, Converse County"; referred specimens described by Loomis 1923; also "Hypsiops luskensis" Schultz and Falkenbach 1950, including Amherst specimens from "Van Tassel area"; also "Merychyus siouxensis" of Schultz and Falkenbach 1947 from "S.E.," "1 mi. S.W." and "N." of Van Tassell
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"Anchitherium agatensis" = Kalobatippus agatensis7
"Anchitherium agatensis" = Kalobatippus agatensis7 Osborn 1918 anchitheriine horse "One mile south of Van Tassell"; implicitly lower Harrison; may include "Anchitherium" of Albright 1999a from "Harrison beds near Van Tassell, Wyoming"
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