PBDB Collection

Myton Pocket: Uintan, Utah

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Reptilia - Anseriformes - Anatidae

	Eonessa anaticula n. gen., n. sp. Wetmore 1938	Wetmore 1938
	collected by John Clark in 1936
Reptilia

	Procaimanoidea utahensis n. gen., n. sp. Gilmore 1946	Gilmore 1946
Mammalia - Acreodi

	Pleurocyon magnus n. gen., n. sp. Peterson 1919	Peterson 1919
	recombined as Simidectes magnus
	6 mi SE of Myton, near base of Myton Mbr. horizon C, and also possibly from horizon B; "Pleurocyon magnum"
Mammalia - Acreodi - Mesonychidae

	Harpagolestes leotensis Peterson 1931	Prothero 1996
	Myton Pocket; presumably "Mesonyx uintensis" of Kay 1957; may include "Uinta C" record of West 1981
Mammalia - Creodonta

	Mimocyon longipes n. sp. Peterson 1919
	type is from Myton Pocket: see Peterson 1919
	= Proviverra longipes Peterson 1919	Alroy 2002

	Limnocyon douglassi Peterson 1919
	= Limnocyon potens Matthew 1909	Prothero 1996
	Myton Pocket
Mammalia - Carnivora - Miacidae

	Prodaphaenus scotti Wortman and Matthew 1899
	at Myton Pocket: Prothero 1996a
	= Miocyon scotti Wortman and Matthew 1899	Alroy 2002
Mammalia

	Procynodictis vulpiceps Wortman and Matthew 1899	Dawson 1980
	Uinta C, confirmed as Myton Pocket by Prothero 1996a; includes type and referred specimen of "Miacis gracilis" of Clark 1939 from "7 miles east and south of Myton": see also Wang and Tedford 1994

	Uintacyon robustus n. sp. (Peterson 1919)
	type is from Myton Pocket: see Peterson 1919 (1 measurement)
	= Tapocyon robustus Peterson 1919	Alroy 2002
Mammalia - Perissodactyla - Equidae

	Epihippus gracilis (Marsh 1871)
	includes "E. parvus" of Prothero 1996a from Myton Pocket
Mammalia - Perissodactyla - Brontotheriidae

	Diplacodon elatum
	genus listed at Myton Pocket by Prothero 1996a; genus invalid according to Mader 2000; also "Brontotherium curtum": status unclear as Mader 1989 restricts Megacerops to the Chadronian
	= Brontotheriidae indet. Marsh 1873	Alroy 2002
Mammalia - Perissodactyla - Rhinocerotidae

	Uintaceras radinskyi n. sp. Holbrook and Lucas 1997	Holbrook and Lucas 1997
	Myton Pocket; "Forstercooperia sp." of Holbrook 1994
Mammalia - Perissodactyla - Hyracodontidae

	Prothyracodon uintense n. sp. Peterson 1919
	from Myton Pocket (see Peterson 1919) and also "E. sp.": see Radinsky 1967a
	= Epitriplopus uintensis Peterson 1919	Alroy 2002

	Prothyracodon obliquidens (Scott and Osborn 1887)
	also "Triplopus sp.": former from Myton Pocket, see Peterson 1919
	= Triplopus obliquidens Scott and Osborn 1887	Alroy 2002
Mammalia - Perissodactyla - Amynodontidae

	Amynodon advenus (Marsh 1875)	Prothero 1996
	Myton Pocket; probably includes "A. intermedius" and "A. advenum?" of Wall 1982 from Uinta C
Mammalia - Perissodactyla

	Isectolophus annectens n. sp. Scott and Osborn 1887	Peterson 1919
	Myton Pocket; not clear why this is omitted by Kay, who may have been confused by the unclear provenance of the type; also includes his "Parisectolophus sp."

	Schizolophodon cuspidens n. gen., n. sp. Peterson 1919	Peterson 1919
	synonym of Isectolophus annectens
Mammalia - Homacodontidae

	Bunomeryx elegans Wortman 1898
	synonym of Bunomeryx montanus
	at Myton Pocket: Prothero 1996a

	Hylomeryx quadricuspis (Peterson 1919)	Peterson 1919
	paratypes, from Myton Pocket

	Mytonomeryx scotti n. sp. Gazin 1955	Gazin 1955
	from Myton Pocket

	Pentacemylus progressus Peterson 1932	Gazin 1955
	Myton Pocket

	Auxontodon pattersoni Gazin 1958	Gazin 1958
	"near entrance of Myton Pocket" (1 measurement)
Mammalia - Camelidae

	Poebrodon kayi n. sp. Gazin 1955	Gazin 1955
	from Myton Pocket
Mammalia - Protoceratidae

	Leptoreodon sp. Wortman 1898
	= Leptoreodon marshi Wortman 1898	Prothero 1996
	Myton Pocket; includes "Camelomeryx sp."

	Leptotragulus medius n. sp. Peterson 1919
	at Myton Pocket, including 23 specimens from Protylopus Quarry, and type is from "Uinta C, 6 miles east of Myton," which appears to be the same locality: see Gazin 1955

	Leptotragulus proavus Scott and Osborn 1887
	at Myton Pocket: Prothero 1996a

	Leptotragulus clarki Gazin 1955
	type is from Protylopus Quarry: see Gazin 1955
Mammalia - Agriochoeridae

	Agriochoeridae indet. Leidy 1869

	Diplobunops matthewi n. sp. Peterson 1919
	Myton Pocket; see also Peterson 1931c, Black 1978
	= Agriochoerus matthewi Peterson 1919	Peterson 1919
	original and current combination Diplobunops matthewi

	Protoreodon petersoni n. sp. Gazin 1955	Gazin 1955
	Myton Pocket

	Protoreodon pumilus (Marsh 1875)
	see Gazin 1955: includes "Protagriochoerus annectens" from Myton Pocket, see Gazin 1955

	Protoreodon medius n. sp. Peterson 1919	Peterson 1919
	synonym of Protoreodon pumilus
	Peterson 1919 very clearly lists type of "P. medius" from Myton Pocket, but no Uinta C material is indicated by Prothero 1996a
Mammalia - Oromerycidae

	Protylopus annectens n. sp. Peterson 1919
	see Gazin 1955: Myton Pocket

	Oromeryx sp. Marsh 1894
	= Oromeryx plicatus Marsh 1894	Prothero 1996
	also said to be from Myton Pocket by Peterson 1919
Mammalia - Micropternodontidae

	Micropternodus sp. Matthew 1903	Prothero 1996
Mammalia

	Talpavus sp. Marsh 1872
	(1 measurement)
	= Talpavus duplus n. sp. Krishtalka 1976	Krishtalka 1976
	replaces ID of McKenna et al. 1962: Myton Pocket; probably includes "Nyctitherium
Mammalia - Lagomorpha - Leporidae

	Mytonolagus petersoni n. sp. Burke 1934
	see Burke 1934b (8 measurements)
Mammalia - Rodentia - Cylindrodontidae

	Pareumys milleri n. sp. Peterson 1919	Peterson 1919
	Myton Pocket; said by Prothero 1996a to be from White River Pocket
Mammalia - Rodentia - Eutypomyidae

	Janimus rhinophilus n. sp. Dawson 1966	Dawson 1966
	Myton Pocket
Mammalia - Rodentia - Ischyromyidae

	Paramys medius n. sp. Peterson 1919
	from Myton Pocket according to Peterson 1919, but from "three miles west of Chipeta Wall" according to Wood 1962 (this locality is not discussed by any other author)
	= Thisbemys medius Peterson 1919	Alroy 2002

	Paramys compressidens n. sp. Peterson 1919
	from Myton Pocket: see Peterson 1919 (1 measurement)

	Prosciurus robustus n. sp. Peterson 1919	Peterson 1919
	recombined as Mytonomys robustus
	from "Horizon C... six miles east of Myton"

	Ischyrotomus eugenei Burke 1935
	referred specimen is from Myton Pocket, but type is from Myton Mbr. at "Head of west fork of Antelope Draw, beneath the rim of Deadman Bench, Uinta County": Burke 1935a; I cannot locate Antelope Draw, but Kay 1934 shows Deadman Bench as running most of the way between Ouray and Kennedy's Hole north of the White River, so this may be in Uinta C in the Wagonhound Canyon section
	= Pseudotomus eugenei Burke 1935	Alroy 2002
Mammalia - Primates - Omomyidae

	Ourayia uintensis (Osborn 1895)	Krishtalka 1978
	Myton Pocket

	Mytonius hopsoni n. sp. Robinson 1968
	= Ourayia hopsoni Robinson 1968	Robinson 1968
	Myton Pocket DUPLICATE REF 2923 or 2924 or 2925
see common names

Geography

Country:	United States	State/province:	Utah	County:	Duchesne
Coordinates:	40.2° North, 109.9° West (view map)
Paleocoordinates:	43.0° North, 98.9° West
Basis of coordinate:	stated in text
Geographic resolution:	outcrop

Time

Period:	Paleogene	Epoch:	Eocene
10 m.y. bin:	Cenozoic 2-3
*Period:	Tertiary
Key time interval:	Uintan
Age range of interval:	46.20000 - 39.70000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Uinta	Member:	lower Myton
Local section:	Uinta	Local bed:	5
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:

general faunal/floral analysis

Taxonomic list comments:according to Burke 1934b, Myton Pocket was not discovered until 1912, so earlier Uinta C records cannot belong to it
Kay's list is for all of Uinta C; I have removed records not tied to Myton Pocket by revised list of Prothero 1996a or other sources
Black and Sutton also list "Leptotomus grangeri"
Myton Pocket is 7 mi. E of Myton, Duchesne Co. (often said to be 6 mi E or SE of Myton) and is close to the base of Uinta C
Protylopus Quarry is within Myton Pocket
"Uintatherium sp." of Kay is probably erroneous, see Wheeler 1961

"Hyrachyus sp." could be Triplopus sensu Radinsky 1967a and no specimens are discussed in the literature

"Mesamynodon medius" of Kay is of unclear status because no material of this species or its sometime synonym "Hyracodon primus" has ever been attributed to the Uinta Fm. sensu stricto

"Hylomeryx simplicidens" of Kay appears to be a nomen nudum

"Achaenodon sp." is listed by Kay, but no other publication suggests that this genus is present above Uinta B

"Simimeryx minutus" is listed by Kay, but no specimen other than the type from Red Narrows is discussed in the literature

Metadata

Also known as:	Protylopus Quarry
Database number:	16607
Authorizer:	J. Alroy	Enterer:	J. Alroy
Modifier:	J. Alroy	Research group:	vertebrate
Created:	1997-04-12 00:00:00	Last modified:	2010-11-23 21:35:28
Access level:	the public	Released:	1997-04-12 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

2052.

J. L. Kay. 1957. The Eocene vertebrates of the Uinta Basin, Utah. Intermountain Association of Petroleum Geologists, Guidebook, 8th Annual Field Conference 110-114 [J. Alroy/J. Alroy]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1271		M. C. Coombs. 1971. Status of Simidectes (Insectivora, Pantolestoidea) of the late Eocene of North America. American Museum Novitates 2455 [J. Alroy/J. Alroy/J. Ju]
1339		M. R. Dawson. 1966. Additional late Eocene rodents (Mammalia) from the Uinta basin, Utah. Annals of Carnegie Museum 38(4):97-116 [J. Alroy/J. Alroy/M. Uhen]
1344		M. R. Dawson. 1980. Paleontology and Geology of the Badwater Creek Area, Central Wyoming. Part 20. the Late Eocene Creodonta and Carnivora. Annals of Carnegie Museum 49(4):79-91 [J. Alroy/J. Alroy/J. Marcot]
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]
1614		C. L. Gazin. 1958. A new dichobunid artiodactyl from the Unita Eocene. Breviora 96:1-6 [J. Alroy/J. Alroy/J. Marcot]
23583		C. W. Gilmore. 1946. A new crocodilian from the Eocene of Utah. Journal of Paleontology 20(1):62-67 [J. Alroy/J. Alroy]
1927		L. T. Holbrook and S. G. Lucas. 1997. A New Genus of Rhinocerotoid from the Eocene of Utah and the Status of North American "Forstercooperia". Journal of Vertebrate Paleontology 17(2):384-396 [J. Alroy/J. Alroy/J. Ju]
2170		L. Krishtalka. 1976. Early Tertiary Adapisoricidae and Erinaceidae (Mammalia, Insectivora) of North America. Bulletin of Carnegie Museum of Natural History 1 [J. Alroy/J. Alroy/J. Ju]
2172		L. Krishtalka. 1978. Paleontology and geology of the Badwater Creek area, central Wyoming Part 15. Review of the late Eocene primates from Wyoming and Utah, and the Plesitarsiiformes. Annals of Carnegie Museum 47(15):335-360 [J. Alroy/J. Alroy/M. Uhen]
2761		O. A. Peterson. 1919. Report Upon the Material Discovered in the Upper Eocene of the Uinta Basin by Earl Douglas in the Years 1908-1909, and by O. A. Peterson in 1912. Annals of Carnegie Museum 12(2):40-168 [J. Alroy/J. Alroy/J. Marcot]
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]
2923		P. Robinson. 1968. The paleontology and geology of the Badwater Creek area, central Wyoming. Annals of Carnegie Museum 39(19):307-326 [J. Alroy/J. Alroy/M. Uhen]
25085		A. Wetmore. 1938. A fossil duck from the Eocene of Utah. Journal of Paleontology 12(3):280-283 [J. Alroy/J. Alroy]
3731		A. E. Wood. 1962. The Early Tertiary Rodents of the Family Paramyidae. Transactions of the American Philosophical Society 52(1):3-261 [J. Alroy/J. Alroy/J. Marcot]