WW-74: Early/Lower Eocene, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
Ectoganus bighornensis Schoch 1981
1 specimen
Mammalia - Nyctitheriidae
Plagioctenoides sp. Bown 1979
7 specimens
"Several isolated teeth and fragmentary jaws are of appropriate size and morphology to belong to Plagioctenoides and must represent either P. microlestes or P. tombowni, but in the absence of direct association with P4 they cannot be confidently assigned to species until differences between P. microlestes and P. tombowni are better understood."
Plagioctenoides tombowni Rose et al. 2012
2 specimens
type locality of Plagioctenoides tombowni
Plagioctenoides microlestes Bown 1979
2 specimens
Leptacodon sp. Matthew and Granger 1921
3 specimens
"Leptacodon sp. 2, probably new"
Leptacodon donkroni Rose et al. 2012
5 specimens
type locality of Leptacodon donkroni
Mammalia - Parapternodontidae
Parapternodus sp. Bown and Schankler 1982
2 specimens
"teeth belong to a species different from Parapternodus antiquus. They might represent a new species, or could belong to the early Wasatchian parapternodontid Koniaryctes paulus Robinson and Kron, 1998, which was described from the Powder River Basin."
Mammalia - Pantolestidae
Palaeosinopa lutreola Matthew 1918
1 specimen
Mammalia - Sespedectidae
Colpocherus sp. Beard and Dawson 2009
1 specimen
"cf. Colpocherus sp., probably new"
Mammalia - Procreodi - Arctocyonidae
Chriacus badgleyi Gingerich 1989
1 specimen
Mammalia - Perissodactyla - Equidae
Hyracotherium sandrae Gingerich 1989
4 specimens
recombined as Sifrhippus sandrae
Mammalia - Phenacodontidae
Ectocion parvus Granger 1915
5 specimens
Copecion davisi Gingerich 1989
2 specimens
Mammalia - Acreodi - Mesonychidae
Dissacus praenuntius Matthew and Granger 1915
1 specimen
Mammalia - Creodonta - Hyaenodontidae
Arfia junnei Gingerich 1989
1 specimen
Mammalia
Uintacyon gingerichi Heinrich et al. 2008
2 specimens
Mammalia - Viverravidae
Viverravus acutus Matthew and Granger 1915
1 specimen
Didymictis leptomylus Cope 1880
7 specimens
Mammalia - Metacheiromyidae
Palaeanodon nievelti Gingerich 1989
2 specimens
Mammalia - Primates - Omomyidae
Teilhardina brandti Gingerich 1993
9 specimens
includes post crania
Mammalia - Primates - Microsyopidae
Niptomomys cf. doreenae McKenna 1960
18 specimens
Nanomomys thermophilus Rose et al. 2012
5 specimens
type locality of Nanomomys thermophilus
Mammalia - Rodentia - Ischyromyidae
Paramys taurus Korth 1984
1 specimen
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960
4 specimens
Mammalia - Macroscelidea - Apheliscidae
Apheliscidae indet. Matthew 1918
1 specimen
"?APHELISCIDAE, probably new"…"30% smaller in linear dimensions than H. zalmouti (Gingerich and Smith, 2006)"
Mammalia - Macroscelidea - Amphilemuridae
Macrocranion junnei Smith et al. 2002
6 specimens
Mammalia - Marsupialia
Marsupialia indet. (Illiger 1811)
2 specimens
Two left calcanei...belong to very small marsupials and perhaps represent Peradectes and Herpetotherium
Mammalia
Herpetotherium innominatum (Simpson 1928)
4 specimens
Peradectes protinnominatus McKenna 1960
6 specimens
"Cf. Peradectes protinnominatus"
Mimoperadectes labrus Bown and Rose 1979
5 specimens
Mammalia - Multituberculata - Neoplagiaulacidae
Ectypodus tardus (Jepsen 1940)
3 specimens
see common names

Geography
Country:United States State/province:Wyoming County:Washakie County
Coordinates: 44.2° North, 107.9° West (view map)
Paleocoordinates:48.7° North, 91.3° West
Basis of coordinate:stated in text
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
Key time interval:Early/Lower Eocene Mammal zone: Wa-0
Age range of interval:56.00000 - 47.80000 m.y. ago
Stratigraphy
Formation:Willwood
Local section:Sand Creek Divide Local bed:12 m
Local order:bottom to top
Regional section:Bighorn Basin Regional bed:sandy cut between Purples 2 and 3
Stratigraphy comments: white sandy mudstone above and cutting into Purple 2; same cut as WW-71.
Lithology and environment
Lithology description: "sandy cut"
Environment:fine channel fill
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:surface (float),sieve
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Amy’s Hill
Database number:154254
Authorizer:J. Bloch Enterer:J. Bloch
Research group:vertebrate
Created:2014-02-06 12:06:43 Last modified:2014-02-06 12:06:43
Access level:the public Released:2014-02-06 12:06:43
Creative Commons license:CC BY
Reference information

Primary reference:
49988. K. D. Rose, A. E. Chew, R. H. Dunn, M. J. Kraus, H. C. Fricke and S. P. Zack. 2012. Earliest Eocene mammalian fauna from the Paleocene-Eocene Thermal Maximum at Sand Creek Divide, southern Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology 36:1-122 [J. Bloch/J. Bloch]