Reservoir Creek Bonanza (Eocene of the United States)

Also known as USGS Loc. D-1198, 1160, 1160N, 1244, 1315, YPM 45 (= 1198B), 45-S (= 1198C), 45-E

Where: Big Horn County, Wyoming (44.5° N, 108.0° W: paleocoordinates 49.2° N, 90.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: T. M. Bown, K. D. Rose, E. L. Simons and S. L. Wing. 1994. Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman formations, southern Bighorn Basin, Wyoming. United States Geological Survey Professional Paper 1540:1-103 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15576: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Schankler-Wing and Bown sections meet at this locality, so it has a meter level in both sections; see Schankler 1980 for placement of YPM 45 at 530 m in his section
USGS 1244 and part of 1198 are in Washakie County
USGS D-1662 is placed at the 470/550 level by B & R 87
 Theriamorpha - Stylinodontidae
Ectoganus cf. gliriformis Cope 1874 taeniodont
 Condylarthra - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
Hyopsodus cf. minor Loomis 1905 condylarth
 Macroscelidea - Amphilemuridae
Macrocranion nitens Matthew 1918 elephant shrew
 Primates - Notharctidae
Cantius abditus n. sp. Gingerich and Simons 1977 primate
from YPM 45: Gingerich and Simons 1977
 Primates - Microsyopidae
Microsyops latidens Cope 1882 primate
 Primates - Paromomyidae
Phenacolemurinae indet.1 Simpson 1955 primate
 Primates - Omomyidae
Absarokius metoecus n. sp. Bown and Rose 1987 tarsier
USGS D-1198 (type is from D-1198-B), 1662, YPM 45-M, -E, -S: B & R 87
Anemorhysis pattersoni n. sp. Bown and Rose 1984 tarsier
described by Bown and Rose 1984; type is from YPM 45-S; includes specimen of "A. musculus" (Szalay 1976 fig. 39); B & R 87: at YPM 45-S, USGS D-1198C
 Procreodi - Arctocyonidae
Chriacus sp. Cope 1883 condylarth
said to be new
Thryptacodon cf. antiquus1 Matthew and Granger 1915 condylarth
Anacodon ursidens Cope 1882 condylarth
 Perissodactyla - Equidae
Xenicohippus grangeri Bown and Kihm 1981 horse
 Perissodactyla - Palaeotheriidae
Hyracotherium sp. Owen 1841 odd-toed ungulate
 Perissodactyla -
Heptodon calciculus Cope 1880 odd-toed ungulate
cf. Homogalax sp. Hay 1899 odd-toed ungulate
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
Bunophorus grangeri5 Sinclair 1914 even-toed ungulate
Y-M45; presumably = "B. sp."
"Diacodexis robustus" = Bunophorus robustus Sinclair 1914 even-toed ungulate
 Theriamorpha - Metacheiromyidae
Palaeanodon ignavus Matthew 1918 placental
 Creodonta - Oxyaenidae
Oxyaena cf. forcipata Cope 1874 creodont
 Creodonta -
Didelphodus sp. Cope 1882 creodont
 Creodonta - Hyaenodontidae
Tritemnodon cf. strenuus1 Cope 1875 creodont
"Prototomus vulpecula" = Gazinocyon vulpeculus Matthew and Granger 1915 creodont
 Creodonta -
Prolimnocyon sp. Matthew and Granger 1915 creodont
 Theriamorpha - Viverravidae
Didymictis protenus4 Cope 1874 placental
Viverravus cf. acutus Matthew and Granger 1915 placental
Viverravus lutosus Gazin 1952 placental
 Theriamorpha -
cf. Oodectes sp. Wortman 1901 placental
Miacis petilus2 Gingerich 1983 placental
probably includes "M. exiguus" based on discussion of Gingerich 1983
Vulpavus australis Matthew and Granger 1915 placental
Vulpavus canavus Cope 1881 placental
Vassacyon promicrodon Wortman and Matthew 1899 placental
Uintacyon cf. asodes Gazin 1952 placental
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Cimolesta - Apatemyidae
Apatemys rodens Troxell 1923 eutherian
Apatemys bellulus Marsh 1872 eutherian
 Cimolesta - Esthonychidae
Esthonyx sp. Cope 1874 tillodont
presumably sensu stricto
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
see also Rose 1999a for material from USGS D-1198 and Y-45S
 Testudines - Kinosternoidea
Baltemys staurogastros3 Hutchison 1991 mud turtle
from UCMP loc V72013 = Yale 45