Discovery Site: Early/Lower Eocene, Wyoming
collected by P. D. Gingerich 1975

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Gerrhotinae indet.
Gastropoda - Heterostropha - Sagdidae
cf. Microphysula sp. Cockerell 1926
Gastropoda - Heterostropha - Helicidae
Hendersonia evanstonensis (White 1878)
original and current combination Helix evanstonensis
Grangerella sinclairi (Cockerell 1912)
original and current combination Gastrodonta evanstonensis sinclairi
Gastropoda - Heterostropha - Pyramidulidae
Discus ralstonensis (Cockerell 1914)
original and current combination Pyramidula ralstonensis
Gastropoda - Heterostropha - Pupillidae
cf. Albertanella minuta Russell 1931
Gastropoda - Heterostropha - Oreohelicidae
Oreohelix megarche Cockerell and Henderson 1912
Gastropoda - Heterostropha - Acteonidae
cf. Pupilla sp. Leach 1828
spelled with current rank as Pupa (Pupilla)
Mammalia - Multituberculata - Neoplagiaulacidae
Ectypodus powelli Jepsen 1940
Mammalia
Peradectes cf. chesteri (Gazin 1952)
    = Peradectes protinnominatus McKenna 1960
Krishtalka and Stucky 1983
old i.d. of Rose 1981a was probably repeated without reference to Krishtalka and Stucky
Mammalia - Viverravidae
Viverravus bowni n. sp. Gingerich 1987
    = Viverravus laytoni Gingerich and Winkler 1985
Alroy 2002
Didymictis proteus Polly 1997
Polly 1997
Mammalia - Nyctitheriidae
Wyonycteris chalix n. gen., n. sp. Gingerich 1987
thought by Gingerich to be a bat, but by Hand et al. 1994 to be a non-chiropteran archontan of unclear affinities (5 measurements)
Leptacodon rosei Gingerich 1987
recombined as Plagioctenodon rosei
cf. Plagioctenodon krausae Bown 1979
    = Plagioctenodon thewisseni Manz and Bloch 2015
Manz and Bloch 2015
cf. Leptacodon sp. Matthew and Granger 1921
Limaconyssus habrus n. gen., n. sp. Gingerich 1987
Mammalia - Primates - Carpolestidae
Carpolestes cf. nigridens Simpson 1928
    = Carpolestes simpsoni n. sp. Bloch and Gingerich 1998
Bloch and Gingerich 1998
Mammalia - Primates - Micromomyidae
Tinimomys graybulliensis Szalay 1974
Mammalia - Dermoptera
cf. Worlandia sp. Bown and Rose 1979
Mammalia - Chiroptera - Icaronycteridae
cf. Icaronycteris sp. Jepsen 1966
a bat
Reptilia
Anguimorpha indet. (Fürbringer 1900)
Varanoidea indet. Gray 1827
Calcardea junnei n. gen., n. sp. Gingerich 1987
Reptilia - Testudines
Plastomenus sp. Cope 1873
Bartels 1983
Amphibia - Temnospondyli - Urodela
Urodela indet. (Duméril 1805)
isolated vertebrae
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
distal humerus
unclassified
cf. Grangerella phenacodorum (Cockerell 1914)
original and current combination Boysia phenacodorum
see common names

Geography
Country:United States State/province:Wyoming County:Park
Coordinates: 44.8° North, 109.0° West (view map)
Paleocoordinates:49.4° North, 92.3° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
*Period:Tertiary *Epoch:Paleocene
Key time interval:Early/Lower Eocene
Age range of interval:56.00000 - 47.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Willwood
Local section:Clark Local bed:1380 m
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: said to be both late Clarkforkian and Eocene
Lithology and environment
Primary lithology:lenticular,brown lithified wackestone
Lithology description: lens J "is a mottled micritic muddy limestone (wackestone) including gastropod shell fragments, plant debris, and vertebrate bone" that is "brown in unweathered hand specimens"
Environment:wet floodplain
Geology comments: the "distribution of limestone lenses and the fauna of lens J suggest accumulation in a hollow tree trunk" on a floodplain, not in a lacustrine context, while "the Ectocion limestone [at SC-29] involved slow burial in current winnowed quartz and carbonate sand [in moving water]"
Taphonomy
Modes of preservation:body,replaced with calcite,bone collector
Size of fossils:macrofossils,mesofossils
Articulated whole bodies:none
Associated major elements:none
Disassociated major elements:some
Disassociated minor elements:some
Feeding/predation traces:punctures
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:bulk,selective quarrying,chemical,field collection
Collection size:53 specimens
Rock censused:5 kg
Reason for describing collection:general faunal/floral analysis
Museum repositories:UMMP
Collectors:P. D. Gingerich Collection dates:1975
Collection method comments: "The entire lens J fauna [at SC-29] was recovered from a mass of freshwater limestone occupying a volume of approximately 2,000 c3 and weighing an estimated 5 kg" and vertebrates fossil were recovered by "dissolution of the limestone in dilute formic acid (10%)"
Taxonomic list comments:the entire original list applies only to lens J
Metadata
Also known as:SC-29
Database number:15081
Authorizer:J. Alroy, P. Holroyd, W. Clyde Enterer:J. Alroy, W. Clyde, P. Holroyd
Modifier:M. Uhen Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2024-01-25 16:02:54
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1656. P. D. Gingerich. 1987. Early Eocene bats (Mammalia, Chiroptera) and other vertebrates in freshwater limestones of the Willlwood Formation, Clark's Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(11):275-320 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
724 W. S. Bartels. 1983. A transitional Paleocene-Eocene reptile fauna from the Bighorn Basin, Wyoming. Herpetologica 39(4):359-374 [J. Alroy/M. Sommers/M. Uhen]
1099 J. I. Bloch and P. D. Gingerich. 1998. Carpolestes simpsoni, New Species (Mammalia, Proprimates) from the Late Paleocene of the Clark's Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(4):131-162 [J. Alroy/J. Alroy/P. Mannion]
2180 L. Krishtalka and R. K. Stucky. 1983. Revision of the Wind River faunas, early Eocene of central Wyoming. Part 3. Marsupialia. Annals of Carnegie Museum 52(9):205-227 [J. Alroy/J. Alroy/J. Alroy]
62691 C. L. Manz and J. I. Bloch. 2015. Systematics and phylogeny of Paleocene–Eocene Nyctitheriidae (Mammalia, Eulipotyphla?) with description of a new species from the late Paleocene of the Clarks Fork Basin, Wyoming, USA. Journal of Mammalian Evolution 22:307-342 [P. Holroyd/P. Holroyd]
2787 P. D. Polly. 1997. Ancestry and Species Definition in Paleontology: A Stratocladistic Analysis of Paleocene-Eocene Viverravidae (Mammalia, Carnivora) from Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(1):1-53 [J. Alroy/J. Alroy/M. Uhen]