Also known as Sage Creek Basin
Where: Beaverhead County, Montana (45.0° N, 112.8° W: paleocoordinates 48.0° N, 101.2° W)
• coordinate based on political unit
When: Dell Beds Formation, Late/Upper Uintan (46.2 - 39.7 Ma)
• said to be late Uintan
Environment/lithology: terrestrial
Primary reference: A. R. Tabrum, D. R. Prothero, and D. Garcia. 1996. Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 278-311 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 16584: authorized by John Alroy, entered by John Alroy on 12.04.1997
Creative Commons license: CC BY (attribution)
Taxonomic list
•not to be confused with Chadronian Hough Draw localitie
•several species listed by Hough 1955 are not mentioned at all by Tabrum et al., but are probably synonyms of other species listed by them
Mammalia | |
"Peratherium knighti" = Herpetotherium knighti
"Peratherium knighti" = Herpetotherium knighti McGrew et al. 1959 marsupial | |
Homacodontidae indet. Marsh 1849 even-toed ungulate | |
Leptotragulinae indet. protoceratid | |
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Hyracodontidae indet. Cope 1879 odd-toed ungulate "Hyracodontid sp., cf. Mesamynodon medius Peterson"
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"Schizotheriodes parvus n. sp." = Schizotheroides parvus
"Schizotheriodes parvus n. sp." = Schizotheroides parvus Hough 1955 odd-toed ungulate see also Hough 1955
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"Dilophodon leotanus" = Heteraletes leotanus, Colodon kayi n. sp.
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Brontotheriidae indet. Marsh 1873 brontothere | |
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Epoicotherium sp. Simpson 1927 placental | |
? Ischyromys sp. Leidy 1856 rodent | |
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Sciuravidae indet. Miller and Gidley 1918 rodent | |
Mytonolagus cf. petersoni Burke 1934 rabbit |