PBDB Collection

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 - 39.7 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

Show authors, comments, and common names

Mammalia
Acreodi - Mesonychidae	Harpagolestes leotensis n. sp. Harpagolestes leotensis n. sp. Peterson 1931 condylarth "Leota Ranch... Upper part of Horizon C": Peterson 1931b
Perissodactyla - Brontotheriidae	"Pseudodiplacodon sp." = Diplacodon¹, Protitanotherium sp. "Pseudodiplacodon sp." = Diplacodon¹ Marsh 1875 brontothere Protitanotherium sp. Osborn 1908 brontothere
Perissodactyla - Hyracodontidae	Triplopus obliquidens Triplopus obliquidens Scott and Osborn 1887 odd-toed ungulate
Perissodactyla - Tapiridae	Heteraletes leotanus¹ Heteraletes leotanus¹ Peterson 1932 tapir
Artiodactyla - Protoceratidae	Leptotragulus clarki², Leptotragulus medius⁵ Leptotragulus clarki² Gazin 1955 protoceratid Leota Ranch; not clear why this is omitted by Prothero Leptotragulus medius⁵ Peterson 1919 protoceratid ditto
Artiodactyla - Agriochoeridae	"Agriochoerus matthewi" = Diplobunops matthewi¹, Protoreodon pumilus¹ "Agriochoerus matthewi" = Diplobunops matthewi¹ Peterson 1919 agriochoerid Protoreodon pumilus¹ Marsh 1875 agriochoerid
Artiodactyla - Homacodontidae	"Bunomeryx elegans" = Bunomeryx montanus⁴, Pentacemylus progressus n. sp.⁶, Pentacemylus leotensis "Bunomeryx elegans" = Bunomeryx montanus⁴ Wortman 1898 even-toed ungulate material previously assigned to Pentacemylus and other genera 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 Pentacemylus leotensis Gazin 1955 even-toed ungulate see also Gazin 1955: type, "Leota Ranch artiodactyl quarry"
Carnivora - Miacidae	Miacidae indet.⁷ Miacidae indet.⁷ Cope 1880 carnivoran compared to "Pleurocyon" and Uintacyon
Creodonta - Hyaenodontidae	Propterodon witteri n. sp.⁸ Propterodon witteri n. sp.⁸ Zack 2019 creodont MCZ VPM 19874 - holotype
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

¹Alroy 2002; ²Gazin 1955; ³Joyce 2014; ⁴Norris 1999; ⁵Norris 2000; ⁶Peterson 1931; ⁷Peterson 1931; ⁸Zack 2019