Buck Spring Dark Red Stratum (Eocene of the United States)

Also known as Guthrie Locality 3; UCM loc. 81029

Where: Natrona County, Wyoming (43.2° N, 107.1° W: paleocoordinates 47.8° N, 90.2° W)

• coordinate based on political unit

When: Lost Cabin Member (Wind River Formation), Lostcabinian (55.8 - 50.3 Ma)

• said to be Lostcabinian

Environment/lithology: terrestrial

Primary reference: R. K. Stucky. 1984. Revision of the Wind River faunas, early Eocene of central Wyoming. Part 5. Geology and biostratigraphy of the upper part of the Wind River Formation, northeastern Wind River Basin. Annals of Carnegie Museum 53(9):231-294 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15915: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• SW 1/4 sec 15 T38N R89W; because county line is half-way through R89W, this is in Natrona County and not Fremont County
"A" horizon of Stucky et al. 1990
"Palaeosyops" borealis and Hyrachyus cf. eximius in Table 4 of Stucky 1984 are from "upper horizons" at Buck Spring, possibly UCM locs. 81030, 031, 032, or 033; note that none of these localities includes more than one reported mammal species
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Cimolesta - Esthonychidae
Esthonyx acutidens Cope 1881 tillodont
 Cimolesta - Pantolestidae
Palaeosinopa veterrima Matthew 1901 eutherian
Palaeosinopa didelphoides Cope 1881 eutherian
 Leptictida - Leptictidae
Palaeictops sp. Matthew 1899 eutherian
Palaeictops multicuspis Granger 1910 eutherian
 Primates - Microsyopidae
Microsyops sp. Leidy 1872 primate
Microsyops cf. scottianus Cope 1881 primate
 Primates - Omomyidae
Artimonius witteri Morris 1954 tarsier
Shoshonius cooperi Granger 1910 tarsier
 Primates - Notharctidae
Notharctus sp. Leidy 1870 primate
"A"
Notharctus cf. venticolus Osborn 1902 primate
 Rodentia - Ischyromyidae
Paramys excavatus Loomis 1907 rodent
Paramys copei Loomis 1907 rodent
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
possibly H. minusculus
Hyopsodus walcottianus Matthew 1915 condylarth
Hyopsodus wortmani Osborn 1902 condylarth
includes "H. paulus": Redline 1997
 Amblypoda - Uintatheriidae
Bathyopsis fissidens Cope 1881 uintathere
 Tribosphenida - Phenacodontidae
Phenacodus sp. Cope 1873 condylarth
Phenacodus vortmani Cope 1880 condylarth
 Placentalia -
Perissodactyla indet. Owen 1848 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Lambdotherium popoagicum Cope 1880 brontothere
 Perissodactyla -
Heptodon posticus Cope 1882 odd-toed ungulate
Heptodon calciculus Cope 1880 odd-toed ungulate
 Perissodactyla - Palaeotheriidae
Hyracotherium vasacciense Cope 1872 odd-toed ungulate
 Tribosphenida - Nyctitheriidae
cf. Plagioctenodon sp. Bown 1979 placental
 Ferae - Viverravidae
Didymictis altidens Cope 1880 placental
Viverravus lutosus Gazin 1952 placental
 Ferae -
cf. Vassacyon sp. Matthew 1909 placental
spelt "Vassocyon"
 Carnivora - Miacidae
Miacidae indet. Cope 1880 carnivoran
Miacis cf. latidens Matthew and Granger 1915 carnivoran
Miacis cf. parvivorus Cope 1872 carnivoran
Miacis cf. exiguus Matthew and Granger 1915 carnivoran
 Carnivora -
Vulpavus canavus Cope 1881 carnivoran
 Tribosphenida - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Hyaenodonta -
Prolimnocyon antiquus Matthew and Granger 1915 eutherian
 Hyaenodonta - Hyaenodontidae
cf. Prototomus sp. Cope 1874 eutherian
 Hyaenodonta -
Didelphodus cf. altidens Marsh 1872 eutherian
 Theriiformes - Peradectidae
Armintodelphys blacki Krishtalka and Stucky 1983 metatherian
 Artiodactyla - Diacodexeidae
Bunophorus sinclairi Guthrie 1966 even-toed ungulate
Diacodexis secans Cope 1881 even-toed ungulate