Henry's Fork Divide (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: upper 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 16234: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• based on maps of Wood 1934, Wheeler 1961, and West 1976a this appears to be the same as Hickey Mountain
presumed to fall entirely in Bridger D based on available records
"Telmatherium cultridens" type is actually from Henry's Fork Hill, see Osborn 1929
 Squamata -
"Saniwa crassa" = Saniwa ensidens1
"Saniwa crassa" = Saniwa ensidens1 Leidy 1870 squamates
YPM 1071, 9 dorsal, 1 sacral, 12 caudal vertebrae and numerous fragments; fragmentary parts of pelvic, limb, and foot bones
 Squamata - Anguidae
cf. Paraglyptosaurus princeps4 Marsh 1872 squamates
USNM 215018, fragment of right maxilla
 Primates - Notharctidae
Notharctus robustior2 Leidy 1872 primate
 Perissodactyla - Hyrachyidae
"Hyrachyus affinis" = Hyrachyus modestus8, Hyrachyus eximius8
"Hyrachyus affinis" = Hyrachyus modestus8 Leidy 1870 odd-toed ungulate
"east side of Henry's Fork Divide (hence C or D)"
Hyrachyus eximius8 Leidy 1871 odd-toed ungulate
"west of Henry's Fork Divide" and "N. Henry's Fork Divide, near road and Divide"; also type of "H. imperialis"
 Tribosphenida - Nyctitheriidae
Pontifactor bestiola n. sp. West 1974 placental
from Bridger D at Henry's Fork Divide, see West 1974
 Creodonta - Oxyaenidae
Patriofelis ferox5 Marsh 1872 creodont
 Taeniodonta - Stylinodontidae
Stylinodon mirus3 Marsh 1874 taeniodont
Bridger D; township and range places this at Henry's Fork Divide
 Ungulata - Uintatheriidae
Uintatherium anceps7 Marsh 1871 uintathere
includes types of "Elachoceras parvum" and "U. alticeps" from Bridger D1 at Henry's Fork Divide, and specimen of "U. robustum" from "between Henry's Fork and Sage Creek" described by Gilmore 1943
 Ungulata -
Helohyus plicodon6 Marsh 1872 even-toed ungulate
upper Bridger