Leota Ranch: Uintan, Utah

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines
Pseudanosteira pulchra n. gen., n. sp. Clark 1932
Joyce 2014
recombined as Anosteira pulchra
CM 11808 - holotype
Mammalia - Creodonta - Hyaenodontidae
Propterodon witteri n. sp. Zack 2019
Zack 2019 1 specimen
MCZ VPM 19874 - holotype
Mammalia - Carnivora - Miacidae
Miacidae indet. Cope 1880
Peterson 1931
compared to "Pleurocyon" and Uintacyon
Mammalia - Acreodi - Mesonychidae
Harpagolestes leotensis n. sp. Peterson 1931
"Leota Ranch... Upper part of Horizon C": Peterson 1931b
Mammalia - Perissodactyla - Hyracodontidae
Triplopus obliquidens (Scott and Osborn 1887)
Mammalia - Perissodactyla - Tapiridae
Dilophodon leotanus (Peterson 1932)
(1 measurement)
    = Heteraletes leotanus Peterson 1932
Alroy 2002
includes type of Peterson 1931; apparently includes "Uinta C" record of Radinsky 1963 that replaces H. sp. of Kay 1957
Mammalia - Perissodactyla - Brontotheriidae
Protitanotherium sp. Osborn 1908
Diplacodon sp. Marsh 1875
    = Pseudodiplacodon sp. Mader 2000
Alroy 2002
synonym of Diplacodon
probably OK based on Mader 2000
Mammalia - Protoceratidae
Leptotragulus clarki Gazin 1955
Gazin 1955
Leota Ranch; not clear why this is omitted by Prothero
Leptotragulus medius Peterson 1919
Norris 2000
ditto
Mammalia - Agriochoeridae
Protoreodon primus (Peterson 1934)
(6 measurements)
    = Protoreodon pumilus Marsh 1875
Alroy 2002
see also Gazin 1955, who places it at "Leota Ranch"; probably includes "Oreodont" of Peterson 1931
Diplobunops matthewi Peterson 1919
    = Agriochoerus matthewi Peterson 1919
Alroy 2002
original and current combination Diplobunops matthewi
includes type of "D. ultimus" of Peterson 1931c; also possibly the specimen of "Diplobunops (?)" described by Peterson 1931d
Mammalia - Homacodontidae
Pentacemylus leotensis Gazin 1955
see also Gazin 1955: type, "Leota Ranch artiodactyl quarry"
Pentacemylus progressus n. sp. Peterson 1932
Peterson 1931
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
Bunomeryx elegans Wortman 1898
Norris 1999
synonym of Bunomeryx montanus
material previously assigned to Pentacemylus and other genera
see common names

Geography
Country:United States State/province:Utah County:Uintah
Coordinates: 40.2° North, 109.6° West (view map)
Paleocoordinates:43.0° North, 98.6° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Lutetian 10 m.y. bin:Cenozoic 2
*Period:Tertiary
Key time interval:Uintan
Age range of interval:46.20000 - 40.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Uinta Member:Uinta C
Local section:Uinta Local bed:6
Local order:bottom to top
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments: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
Metadata
Also known as:Leota Quarry; Thorne Quarry
Database number:16594
Authorizer:J. Alroy, P. Holroyd, P. Mannion Enterer:J. Alroy, P. Mannion, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Created:1997-04-12 00:00:00 Last modified:2010-11-23 21:58:00
Access level:the public Released:1997-04-12 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

2802. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1608 C. L. Gazin. 1955. A review of the Upper Eocene Artiodactyla of North America. Smithsonian Miscellaneous Collections 128(8):1-96 [J. Alroy/J. Alroy/J. Marcot]
63405 W. G. Joyce. 2014. A Review of the Fossil Record of Turtles of the Clade Pan-Carettochelys. Bulletin of the Peabody Museum of Natural History 55(1):3-33 [P. Mannion/P. Mannion]
2658 C. A. Norris. 1999. The cranium of Bunomeryx (Artiodactyla: Homacodontidae) from the Upper Eocene Uinta deposits of Utah and its implications for tylopod systematics. Journal of Vertebrate Paleontology 19(4):742-751 [J. Alroy/J. Alroy/J. Alroy]
2659 C. A. Norris. 2000. The cranium of Leptotragulus, a hornless protoceratid (Artiodactyla: Protoceratidae) from the MIddle Eocene of North America. Journal of Vertebrate Paleontology 20(2):341-348 [J. Alroy/J. Alroy/J. Alroy]
2766 O. A. Peterson. 1931. New Species of the genus Teleodus from the upper Uinta of northeastern Utah. Annals of Carnegie Museum 20(3-4):307-312 [J. Alroy/J. Alroy]
2767 O. A. Peterson. 1931. New Mesonychids From The Uinta. Annals of Carnegie Museum 20(3-4):333-339 [J. Alroy/J. Alroy/J. Marcot]
71068 S. P. Zack. 2019. The first North American Propterodon (Hyaenodonta: Hyaenodontidae), a new species from the late Uintan of Utah. PeerJ 7(e8136):1-32 [P. Holroyd/P. Holroyd]