Little Muddy Creek (Fossil Basin): Tiffanian, Wyoming
collected 1961 1967

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines
Testudines indet. Batsch 1788
"indeterminate fragments of a turtle"
Mammalia - Pentacodontidae
Aphronorus orieli n. sp. Gazin 1969
(6 measurements)
Mammalia - Macroscelidea - Apheliscidae
? Haplaletes sp. Simpson 1935
Mammalia - Macroscelidea
? Leptacodon ladae Simpson 1935
    = Adunator ladae Simpson 1935
Alroy 2002
Mammalia - Condylarthra - Hyopsodontidae
cf. Litaletes disjunctus Simpson 1935
Promioclaenus cf. acolytus (Cope 1882)
(3 measurements)
Promioclaenus cf. lemuroides (Matthew 1897)
(2 measurements)
Mammalia - Procreodi - Arctocyonidae
Chriacus cf. pelvidens (Cope 1881)
(2 measurements)
Tricentes subtrigonus (Cope 1881)
(4 measurements)
    = Mimotricentes cf. subtrigonus Cope 1881
Alroy 2002
recombined as Tricentes subtrigonus
Chriacus truncatus Cope 1884
(4 measurements)
    = cf. Chriacus baldwini Cope 1882
Alroy 2002
Mammalia - Primates - Palaechthonidae
Torrejonia wilsoni Gazin 1968
(1 measurement)
    = Torrejonia sirokyi Szalay 1973
Gunnell 1989
Mammalia - Primates - Plesiadapidae
cf. Pronothodectes matthewi Gidley 1923
(2 measurements)
    = Nannodectes cf. intermedius Gazin 1971
Gingerich et al. 1983
presumably = "cf. Pronothodectes matthewi" of Gazin, referred to N. gazini by Gingerich 1975, 1976
Mammalia - Multituberculata - Neoplagiaulacidae
Neoplagiaulax cf. grangeri (Simpson 1935)
Ectypodus powelli Jepsen 1940
Mammalia - Multituberculata - Ptilodontidae
Ptilodus cf. montanus Douglass 1908
see common names

Geography
Country:United States State/province:Wyoming County:Lincoln
Coordinates: 41.6° North, 110.7° West (view map)
Paleocoordinates:47.8° North, 91.4° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Paleocene
10 m.y. bin:Cenozoic 1
*Period:Tertiary
Key time interval:Tiffanian
Age range of interval:61.70000 - 56.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Evanston
Lithology and environment
Primary lithology: "siliciclastic"
Lithology description: "variegated strat"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Disassociated minor elements:many
Collection methods and comments
Collection methods:field collection
Collection size:45 specimens
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection dates:1961 to 1967
Metadata
Database number:14965
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:2000-05-19 00:00:00 Last modified:2007-06-19 12:26:32
Access level:the public Released:2000-05-19 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

1621. C. L. Gazin. 1969. A new occurrence of Paleocene mammals in the Evanston Formation, southwestern Wyoming. Smithsonian Contributions to Paleobiology 2:1-16 [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]
1671ETE 1541P. D. Gingerich, P. Houde, and D. W. Krause. 1983. A New Earliest Tiffanian (Late Paleocene) Mammalian Fauna from Bangtail Plateau, Western Crazy Mountain Basin, Montana. Journal of Paleontology 57(5) [J. Alroy/J. Alroy/J. Ju]
1730 G. F. Gunnell. 1989. Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology 27:1-157 [J. Alroy/J. Alroy/P. Mannion]