Little Muddy II (UM BB-110) (Eocene to of the United States)

Where: Lincoln County, Wyoming (41.8° N, 110.7° W: paleocoordinates 46.5° N, 95.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Wasatch Formation, Wasatchian to Wasatchian (55.8 - 46.2 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: W. C. Clyde, J.-P. Zonneveld, J. Stamatakos, G. F. Gunnell, and W. S. Bartels. 1997. Magnetostratigraphy across the Wasatchian-Bridgerian boundary (early to middle Eocene) in the western Green River Basin, Wyoming. Journal of Geology 105:657-669 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15669: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• see map of Zonneveld et al. 2000, who repeat the list
"Hyopsodus miticulus" is omitted by Zonneveld et al. 2000
Mammalia
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Rodentia - Sciuravidae
Knightomys depressus Loomis 1907 rodent
Sciuravus nitidus Marsh 1871 rodent
 Primates - Notharctidae
Cantius nunienus2 Cope 1881 primate
 Primates - Paromomyidae
Simpsonlemur cf. jepseni1 Simpson 1955 primate
 Primates - Omomyidae
Anemorhysis cf. wortmani Bown and Rose 1984 tarsier
 Perissodactyla - Palaeotheriidae
Hyracotherium vasacciense Cope 1872 odd-toed ungulate
 Theriamorpha - Phenacodontidae
Meniscotherium chamense Cope 1874 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis secans Cope 1881 even-toed ungulate
 Creodonta - Hyaenodontidae
Hyaenodontidae indet.2 Leidy 1869 creodont
 Theriamorpha - Viverravidae
Viverravus minutus Wortman 1901 placental
 Theriamorpha -
Vulpavus canavus2 Cope 1881 placental
 Theriamorpha - Metacheiromyidae
Palaeanodon sp. Matthew 1918 placental
 Condylarthra - Hyopsodontidae
Hyopsodus wortmani Osborn 1902 condylarth
 Cimolesta - Pantolestidae
Palaeosinopa cf. lutreola Matthew 1918 eutherian
 Theriamorpha - Herpetotheriidae
Herpetotherium marsupium1 Troxell 1923 marsupial
Reptilia
 Squamata -
Amphisbaenia indet.2 Gray 1844 worm lizard
UM 101168, fused atlas and axis
 Squamata - Anguidae
Xestops cf. vagans2 Marsh 1872 squamates
 Crocodylia - Crocodylidae
cf. Crocodylus affinis2 Marsh 1871 crocodile