Millersville (Eocene of the United States)

Where: Uinta County, Wyoming (41.2° N, 110.5° W: paleocoordinates 45.2° N, 96.8° W)

• coordinate based on political unit

When: lower Member (Bridger Formation), Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: terrestrial

Primary reference: C. L. Gazin. 1976. Mammalian Faunal Zones of the Bridger Middle Eocene. Smithsonian Contributions to Paleobiology 26:1-25 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 16284: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Roger Benson and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

• type of Microparamys minutus may be from Millersville Bridger B: see Wood 1962
 Testudines - Adocidae
"Baptemys wyomingensis" = Adocus wyomingensis6
"Baptemys wyomingensis" = Adocus wyomingensis6 Leidy 1869 turtle
YPM 484: crusht carapace and a complete plastron ftext-fig. 338), the nearly complete skull (plate 37, figs. 11, 12, 13), and portions of limb bones (collected 1870)
 Testudines - Panemydidae
Chrysemys wyomingensis5 Leidy 1869 pond turtle
 Primates - Omomyidae
Washakius insignis2 Leidy 1873 tarsier
"low in B, not far from the confluence of Black's Fork and Smith's Fork" (i.e., at Millersville)
 Primates - Notharctidae
"Notharctus tenebrosus" = Notharctus tenebrosus9, "Notharctus pugnax n. sp." = Notharctus tenebrosus3, "Aphanolemur gibossus n. sp." = Smilodectes
"Notharctus tenebrosus" = Notharctus tenebrosus9 Leidy 1870 primate
Bridger B; smaller group of specimens in chart, see also Gingerich 1979a
"Notharctus pugnax n. sp." = Notharctus tenebrosus3 Leidy 1870 primate
from lower Bridger at Millersville, referred specimen from B2; see also Gingerich 1979a
"Aphanolemur gibossus n. sp." = Smilodectes primate
from Bridger B at Millersville
 Rodentia - Sciuravidae
Sciuravus nitidus1 Marsh 1871 rodent
lower Bridger
Sciuravus bridgeri n. sp. Wilson 1938 rodent
from "Miller's Ranch? (or Millersville)": see Wilson 1938a
 Rodentia - Ischyromyidae
Paramys delicatus16 Leidy 1871 rodent
"Millersville (hence B3)"
 Perissodactyla - Brontotheriidae
"Palaeosyops paludosus" = Palaeosyops paludosus8, "Palaeosyops laevidens" = Palaeosyops paludosus4
"Palaeosyops paludosus" = Palaeosyops paludosus8 Leidy 1870 brontothere
from Bridger B; said in figure caption to be from B1 at "Little Dry Creek"
"Palaeosyops laevidens" = Palaeosyops paludosus4 Leidy 1870 brontothere
lower Bridger B
 Perissodactyla - Hyrachyidae
"Hyrachyus modestus" = Hyrachyus modestus15, "Hyrachyus affinis" = Hyrachyus modestus15
"Hyrachyus modestus" = Hyrachyus modestus15 Leidy 1870 odd-toed ungulate
Bridger B; includes "Metahyrachyus bicornutus" type of Troxell 1922d from "Millersville, near Fort Bridger"; B1 and B2 specimens are described by Wood 1934
"Hyrachyus affinis" = Hyrachyus modestus15 Leidy 1870 odd-toed ungulate
 Perissodactyla - Equidae
Orohippus major n. sp. Marsh 1874 horse
from "Horizon B": see Granger 1908, Kitts 1957b
 Ferae -
Oodectes herpestoides Wortman 1901 placental
from Bridger B; see also Thorpe 1923a
 Carnivora -
"Miacis hargeri" = Vulpavus hargeri
"Miacis hargeri" = Vulpavus hargeri Wortman 1901 carnivoran
level not stated; see also Thorpe 1923a
 Taeniodonta - Stylinodontidae
Stylinodon mirus10 Marsh 1874 taeniodont
"near Millersville"; Gazin asserts that the type locality is unknown
 Trogontia - Esthonychidae
Tillodon fodiens n. sp. Marsh 1875 tillodont
see Gazin 1953
 Ungulata - Hyopsodontidae
Hyopsodus paulus13 Leidy 1870 condylarth
"low B"
Hyopsodus minusculus Leidy 1873 condylarth
 Ungulata - Homacodontidae
Antiacodon pygmaeus14 Cope 1872 even-toed ungulate
Bridger B; additional specimen from "Lower Bridge" near Millersville is assigned to Microsus by Walsh 2000
Homacodon vagans14 Marsh 1872 even-toed ungulate
Bridger B
Microsus cuspidatus14 Leidy 1870 even-toed ungulate
"opposite Millersville" in Bridger B; also includes his "Antiacodon venustus" according to Walsh 2000
 Insectivora - Apatemyidae
Apatemys sp.12 Marsh 1872 insectivoran
 Acreodi - Mesonychidae
Harpagolestes macrocephalus14 Wortman 1901 condylarth
referred specimen "near Millersville" in Bridger B also discussed by Thorpe 1923a
 Hyaenodonta -
"Thinocyon velox" = Limnocyon velox11
"Thinocyon velox" = Limnocyon velox11 Marsh 1872 eutherian
"probably" lower Bridger
 Hyaenodonta - Hyaenodontidae
Sinopa rapax7 Leidy 1871 eutherian
Bridger B2; also "S. minor" of Thorpe 1923a from lower Bridger
 Theriiformes - Herpetotheriidae
"Peratherium innominatum n. sp." = Herpetotherium innominatum
"Peratherium innominatum n. sp." = Herpetotherium innominatum Simpson 1928 marsupial
see Troxell 1923e, Simpson 1928b, Krishtalka and Stucky 1983a