Leota Ranch (Eocene of the United States)

Also known as Leota Quarry; Thorne Quarry

Where: Uintah County, Utah (40.2° N, 109.6° W: paleocoordinates 43.0° N, 98.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Uinta C Member (Uinta Formation), Uintan (46.2 - 40.4 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: D. R. Prothero. 1996. Magnetic stratigraphy and biostratigraphy of the middle Eocene Uinta Formation, Uinta Basin, Utah. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 3-24 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 16594: authorized by John Alroy, entered by John Alroy on 12.04.1997, edited by Philip Mannion and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Thorne Quarry is just above Leota Quarry, and both are in the Willow Creek section in the central part of the basin near Ouray: see Prothero and Swisher 1992
said by Peterson 1931c to be 400' above base of "horizon C," so his "D. uintensis" type from 250' above base of "horizon C" is from a different locality
Reptilia
 Testudines - Carettochelyidae
"Pseudanosteira pulchra n. gen. n. sp." = Anosteira pulchra3
"Pseudanosteira pulchra n. gen. n. sp." = Anosteira pulchra3 Clark 1932 turtle
CM 11808 - holotype
Mammalia
 Perissodactyla - Brontotheriidae
"Pseudodiplacodon sp." = Diplacodon1, Protitanotherium sp.
"Pseudodiplacodon sp." = Diplacodon1 Marsh 1875 brontothere
Protitanotherium sp. Osborn 1908 brontothere
 Perissodactyla - Hyracodontidae
Triplopus obliquidens Scott and Osborn 1887 odd-toed ungulate
 Perissodactyla - Tapiridae
Heteraletes leotanus1 Peterson 1932 tapir
 Carnivora - Miacidae
Miacidae indet.7 Cope 1880 carnivoran
compared to "Pleurocyon" and Uintacyon
 Ungulata - Homacodontidae
"Bunomeryx elegans" = Bunomeryx montanus4 Wortman 1898 even-toed ungulate
material previously assigned to Pentacemylus and other genera
Pentacemylus leotensis Gazin 1955 even-toed ungulate
see also Gazin 1955: type, "Leota Ranch artiodactyl quarry"
Pentacemylus progressus n. sp.6 Peterson 1932 even-toed ungulate
also "tentatively referred" material of Gazin 1955 from "Leota Ranch artiodactyl quarry"; not clear why this is omitted by Prothero DUPLICATE REF 2766 or 2767 or 2768 or 2769
 Ungulata - Agriochoeridae
Protoreodon pumilus1, "Agriochoerus matthewi" = Diplobunops matthewi1
Protoreodon pumilus1 Marsh 1875 agriochoerid
"Agriochoerus matthewi" = Diplobunops matthewi1 Peterson 1919 agriochoerid
 Ungulata - Protoceratidae
Leptotragulus medius5 Peterson 1919 protoceratid
ditto
Leptotragulus clarki2 Gazin 1955 protoceratid
Leota Ranch; not clear why this is omitted by Prothero
 Acreodi - Mesonychidae
Harpagolestes leotensis n. sp. Peterson 1931 condylarth
"Leota Ranch... Upper part of Horizon C": Peterson 1931b
 Hyaenodonta - Hyaenodontidae
Propterodon witteri n. sp.8 Zack 2019 eutherian
MCZ VPM 19874 - holotype