Wagonhound Canyon (Uinta B2) (Eocene of the United States)

Also known as Wagonhound Bend

Where: Uintah County, Utah (40.2° N, 109.9° W: paleocoordinates 43.0° N, 98.9° W)

• coordinate based on political unit

When: Wagonhound 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 16646: authorized by John Alroy, entered by John Alroy on 21.09.1998, edited by Roger Benson and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is Prothero's "B2" list, which I assign to Wagonhound Section based on section of Peterson quoted by Osborn, and on later section of Riggs 1912, which suggest that most early AMNH, Princeton, and CM collections from "White River," "eastern end of Uinta Basin," etc. are from the upper part of Wagonhound Canyon between Bonanza and Kennedy's Hole, all of which are to the west of Coyote Basin and considerably to the east of White River Pocket (see)
the following records are strictly Uinta C according to Prothero or others but placed here by Kay 1957 or others:
likely to include any of the following "Wagonhound member" records of Kay 1957 and "B" records of others: Thisbemys ("Paramys") medius (strictly Uinta C: Wood 1962) "Ischyrotomus gidleyi" (synonym of Reithroparamys sciuroides; type is said by Wood 1962 and Black and Sutton 1984 to be from the Myton Mbr.) Leptotomus leptodus Wood 1962: "Wagonhound member... White River"; includes type of "Paramys grangeri" of Matthew 1910b Bunomeryx elegans
the following "Wagonhound" or "Uinta B" records are problematic for other reasons: Mytonomys mytonensis Korth 1988b (not mentioned by Prothero) "diacodont" Achaenodon insolens Peterson 1919: Douglass material from "Horizon B" (= Uinta B2), locality not given (species not recognized by Prothero)
"Oxyaenodon wortmani": probably type of Van Valen 1966, a nomen dubium AMNH specimen from "Uinta B"

"Isectolophus annectens" may be supposed Uinta C material of Peterson 1919 from "White River" or "Homogalax uintensis" type of Troxell 1922b from "mouth of the White River, Utah"
 Testudines - Baenidae
"Baena gigantea n. sp." = Chisternon undatum4, "Baena emiliae" = Baena arenosa5, "Baena inflata" = Baena affinis5
"Baena gigantea n. sp." = Chisternon undatum4 Leidy 1871 turtle
CM 3441 (type of Baena gigantea Gilmore, 1915, figs. 5-7, pl. 20), shell
"Baena emiliae" = Baena arenosa5 Leidy 1870 turtle
CM 3443, CM 3244
"Baena inflata" = Baena affinis5 Leidy 1871 turtle
CM 3442
 Primates - Omomyidae
Ourayia uintensis Osborn 1895 tarsier
new material
 Rodentia - Sciuravidae
Sciuravus altidens n. sp.6 Peterson 1919 rodent
from base of Uinta B2 "between Bonanza and Kennedy's Hole" (i.e., in Wagonhound Canyon); listed by Prothero 1996a at White River Pocket for unknown reasons
 Rodentia - Ischyromyidae
Pseudotomus petersoni n. sp. Matthew 1910 rodent
presumably type of Matthew 1910b from "Telmatotherium level"; see also Wood 1962, who gives no locality data
Thisbemys uintensis n. sp. Osborn 1895 rodent
presumably type of Osborn 1895, described by Wood 1962; also Wood's "Paramys sp."from "Wagonhound member (B)... Uinta Basin"
 Perissodactyla - Brontotheriidae
Sthenodectes incisivum3 Douglass 1909 brontothere
Sphenocoelus hyognathus7 Osborn 1889 brontothere
type of Osborn 1895 upper Uinta B (=B2); "D. hyognathus" from Uinta B2 of Osborn 1929; may or may not include the following: "D. longiceps" Peterson 1924: type, lower B (= B2) "one-half mile east of Well No. 2, near Bonanza"; assigned to Uinta B2 by Osborn 1929 "D. intermedius" Osborn 1908: type, Uinta B (= B2); see also Peterson 1924 "D. heterodon" Douglass 1909d: type, upper B (=B2) or lower C "six or seven miles northeast of Well 2"; placed in Wagonhound Member by Kay "D. fluminalis" Peterson 1924: type, Uinta B "Amynodon Sandstone"
Metarhinus sp.1 Osborn 1908 brontothere
 Perissodactyla - Chalicotheriidae
"Eomoropus annectens n. sp." = Eomoropus amarorum6
"Eomoropus annectens n. sp." = Eomoropus amarorum6 Cope 1881 chalicothere
type is from "near Wagon-hound Bend" (Peterson 1919); see also Radinsky 1964; upper D. cornutus (B2) beds according to Lucas and Schoch 1989; E. amarorum of Prothero 1996
 Perissodactyla - Amynodontidae
Amynodon advenus Marsh 1875 odd-toed ungulate
includes "A. intermedius" Riggs 1912 from below Amynodon Sandstone in Kennedy's Basin
Amynodon reedi Stock 1939 odd-toed ungulate
probably material of Wall 1982
 Perissodactyla - Hyracodontidae
Epitriplopus uintensis Peterson 1919 odd-toed ungulate
new material
Triplopus implicatus Cope 1873 odd-toed ungulate
new material
Triplopus obliquidens Scott and Osborn 1887 odd-toed ungulate
new material
 Perissodactyla - Equidae
Epihippus gracilis Marsh 1871 horse
new material
 Carnivora - Miacidae
"Miacis uintensis n. sp." = Prodaphaenus uintensis, Miocyon scotti n. sp.
"Miacis uintensis n. sp." = Prodaphaenus uintensis Osborn 1895 carnivoran
probably type of Osborn 1895
Miocyon scotti n. sp. Wortman and Matthew 1899 carnivoran
probably type of Wortman and Matthew 1899; see also Gustafson 1986b
 Carnivora -
Procynodictis vulpiceps1 Wortman and Matthew 1899 carnivoran
new material; possibly the "miacid" skeleton from "upper B or lower C" mentioned by Peterson 1919
 Ungulata - Uintatheriidae
Uintatherium sp. Leidy 1872 uintathere
probably material of Wheeler 1961 from "Uinta B2... near the White River"
 Ungulata - Homacodontidae
Mesomeryx grangeri n. gen. n. sp.
Mesomeryx grangeri n. gen. n. sp. Peterson 1919 even-toed ungulate
see Peterson 1919: type; said to be from "Lower C," but actually from Uinta B "N.E. of Well No. 2" according to Gazin 1955
 Ungulata -
Achaenodon uintensis n. sp. Osborn 1895 even-toed ungulate
see Peterson 1919: includes type, from horizon "B... eastern portion of Uinta Basin"; presumably includes "Protelotherium sp." of Kay 1957, placed at top of Uinta B2 in Amynodon Sandstone by Riggs 1912, Osborn 1929
 Ungulata - Oromerycidae
Protylopus petersoni Wortman 1898 even-toed ungulate
new material
Oromeryx plicatus Marsh 1894 even-toed ungulate
new material
 Ungulata - Agriochoeridae
Protoreodon pumilus1 Marsh 1875 agriochoerid
new material
Protoreodon parvus Scott and Osborn 1887 agriochoerid
new material
 Ungulata - Protoceratidae
Leptotragulus proavus Scott and Osborn 1887 protoceratid
probably "Uinta B" material of Kay 1957
Leptoreodon marshi Wortman 1898 protoceratid
probably "Uinta B" material of Kay 1957; his "Leptoreodon gracilis" appears to be a nomen nudum
 Insectivora - Apatemyidae
Apatemys uintensis n. sp. Matthew 1921 insectivoran
probably the type of Matthew 1921, provenance not stated
 Acreodi - Mesonychidae
Harpagolestes brevipes n. sp.8 Thorpe 1923 condylarth
"White River, Utah... from the greenish white clay horizon"; this seems to be the "Green clays" (= Uinta B2 below Amynodon Sandstone) of Riggs 1912 in Kennedy's Basin; this species is nowhere mentioned by Prothero
Mesonyx obtusidens Cope 1871 condylarth
new material
 Hyaenodonta -
Limnocyon potens1 Matthew 1909 eutherian
probably type of Peterson 1919: from "horizon B... Eastern end of Uinta Basin"
 Oxyaenodonta - Oxyaenidae
Apataelurus kayi n. sp.2 Scott 1937
presumed to be type of Scott 1938 from "Middle Uinta beds (Section B)," no locality given; and from "Uinta B" by Denison