Vista (Oligocene of the United States)

Where: Logan County, Colorado (40.8° N, 103.1° W: paleocoordinates 41.8° N, 95.8° W)

• coordinate based on political unit

When: Vista Member (White River Formation), Whitneyan (33.3 - 30.8 Ma)

Environment/lithology: terrestrial

Primary reference: E. C. Galbreath. 1953. A contribution to the Tertiary geology and paleontology of northeastern Colorado. University of Kansas Paleontological Contributions Vertebrata 4:1-120 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17426: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• White Marker bed at the base of the member is geochemically and paleomagnetically correlable with the Lower Whitney Ash, making this equivalen to Whitney B: Prothero 1996c
Mammalia
 Rodentia - Cricetidae
Eumys brachyodus Wood 1937 mouse
 Lagomorpha - Leporidae
Palaeolagus intermedius Matthew 1899 rabbit
Palaeolagus burkei n. sp. Wood 1940 rabbit
see Wood 1940
 Perissodactyla - Hyracodontidae
Hyracodon leidyanus3 Troxell 1921 odd-toed ungulate
 Perissodactyla - Rhinocerotidae
Diceratherium tridactylum4 Osborn 1893 rhinoceros
"Vista Member, Logan County, Colorado"
 Perissodactyla - Equidae
Miohippus sp. Marsh 1874 anchitheriine horse
 Tribosphenida - Proscalopidae
Proscalops miocaenus n. sp. Matthew 1901 placental
 Carnivora - Canidae
Mesocyon temnodon1 Wortman and Matthew 1899 canid
 Ungulata - Merycoidodontidae
Leptauchenia decora Leidy 1856 oreodont
"Merycoidodon major" = Merycoidodon (Otarohyus) major1 Leidy 1853 oreodont
 Ungulata - Tayassuidae
Tayassuidae indet.5 Palmer 1897 peccary
 Ungulata - Leptochoeridae
Leptochoerus spectabilis Leidy 1856 even-toed ungulate
KU-Col-14: see Edwards 1976a
 Ungulata - Camelidae
"Paralabis cedrensis" = Matthewlabis cedrensis2
"Paralabis cedrensis" = Matthewlabis cedrensis2 Matthew 1901 camel
 Ungulata - Hypisodontidae
Hypisodus minimus Cope 1873 ruminant
"form B"
 Ungulata - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
 Theriiformes - Herpetotheriidae
"Herpetotherium fugax" = Peratherium fugax1
"Herpetotherium fugax" = Peratherium fugax1 Cope 1873 marsupial