Little Muddy Creek (Fossil Basin) (Paleocene of the United States)

Where: Lincoln County, Wyoming (41.6° N, 110.7° W: paleocoordinates 47.8° N, 91.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Evanston Formation, Tiffanian (61.7 - 56.8 Ma)

Environment/lithology: terrestrial; siliciclastic sediments

• "variegated strat"

Size classes: macrofossils, mesofossils

Collected in 1961 to 1967; reposited in the USNM

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14965: authorized by John Alroy, entered by John Alroy on 19.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Multituberculata - Ptilodontidae
Ptilodus cf. montanus
Ptilodus cf. montanus Douglass 1908 multituberculate
 Multituberculata - Neoplagiaulacidae
Ectypodus powelli, Neoplagiaulax cf. grangeri
Ectypodus powelli Jepsen 1940 multituberculate
Neoplagiaulax cf. grangeri Simpson 1935 multituberculate
 Macroscelidea - Apheliscidae
? Haplaletes sp.
? Haplaletes sp. Simpson 1935 elephant shrew
 Macroscelidea -
Adunator ladae1
Adunator ladae1 Simpson 1935 elephant shrew
 Primates - Plesiadapidae
Nannodectes cf. intermedius2
Nannodectes cf. intermedius2 Gazin 1971 primate
 Primates - Palaechthonidae
Torrejonia sirokyi3
Torrejonia sirokyi3 Szalay 1973 primate
 Procreodi - Arctocyonidae
cf. Chriacus baldwini1, Chriacus cf. pelvidens, "Mimotricentes cf. subtrigonus" = Tricentes subtrigonus1
cf. Chriacus baldwini1 Cope 1882 condylarth
Chriacus cf. pelvidens Cope 1881 condylarth
"Mimotricentes cf. subtrigonus" = Tricentes subtrigonus1 Cope 1881 condylarth
 Condylarthra - Hyopsodontidae
cf. Litaletes disjunctus, Promioclaenus cf. lemuroides, Promioclaenus cf. acolytus
cf. Litaletes disjunctus Simpson 1935 condylarth
Promioclaenus cf. lemuroides Matthew 1897 condylarth
Promioclaenus cf. acolytus Cope 1882 condylarth
 Cimolesta - Pentacodontidae
Aphronorus orieli n. sp.
Aphronorus orieli n. sp. Gazin 1969 eutherian
Reptilia
 Testudines -
Testudines indet.
Testudines indet. Batsch 1788 turtle
"indeterminate fragments of a turtle"
1Alroy 2002; 2Gingerich et al. 1983; 3Gunnell 1989