West Alheit Pocket (Eocene of the United States)

Also known as CM 953; UCMP V-5357A

Where: Moffat County, Colorado (40.6° N, 108.1° W: paleocoordinates 45.4° N, 91.9° W)

• coordinate based on political unit

When: Wasatch Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Size classes: macrofossils, mesofossils

Primary reference: M. C. McKenna. 1960. Fossil Mammalia from the early Wasatchian Four Mile fauna, Eocene of northwest Colorado. University of California Publications in Geological Sciences 37(1):1-130 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15887: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• 392 m level in local section according to Hill et al. 2000
CM 953 may include other UCMP localities
Mammalia
 Theriamorpha - Leptictidae
cf. Prodiacodon tauricinerei1 Jepsen 1930 eutherian
 Cimolesta - Pantolestidae
Palaeosinopa incerta4 Bown and Schankler 1982 eutherian
 Cimolesta - Apatemyidae
Labidolemur kayi10 Simpson 1929 eutherian
 Macroscelidea - Apheliscidae
Apheliscus sp.17 Cope 1875 elephant shrew
: "A. nitidus" of McKenna
 Macroscelidea - Amphilemuridae
cf. Macrocranion nitens1 Matthew 1918 elephant shrew
 Condylarthra - Hyopsodontidae
Hyopsodus simplex16 Loomis 1905 condylarth
CM 953
Hyopsodus loomisi McKenna 1960 condylarth
includes "H. miticulus" according to Gingerich 1989, but see Gunnell 1989, Redline 1997; also at CM 953: Redline 1997
 Rodentia - Ischyromyidae
Paramys sp. Leidy 1871 rodent
forms "A" and "B"
 Primates - Paromomyidae
cf. Simpsonlemur jepseni1 Simpson 1955 primate
 Primates - Omomyidae
Tetonius mckennai n. sp.3 Bown and Rose 1987 tarsier
Tetonius matthewi3 Bown and Rose 1987 tarsier
 Primates - Notharctidae
Cantius mckennai8 Gingerich and Simons 1977 primate
 Primates - Microsyopidae
Niptomomys doreenae2 McKenna 1960 primate
Microsyops angustidens9 Matthew 1915 primate
"Haplomylus speirianus" = Microsyops speirianus Cope 1880 primate
 Placentalia -
Creodonta indet.7 Cope 1875 creodont
 Creodonta - Hyaenodontidae
cf. Acarictis ryani14 Gingerich and Deutsch 1989 creodont
Prototomus martis14 Gingerich and Deutsch 1989 creodont
 Creodonta -
Didelphodus altidens1 Marsh 1872 creodont
Didelphodus absarokae Cope 1881 creodont
 Creodonta - Oxyaenidae
Dipsalidictis transiens11 Matthew and Granger 1915 creodont
 Theriamorpha - Viverravidae
Didymictis leptomylus15 Cope 1880 placental
Viverravus acutus Matthew and Granger 1915 placental
 Theriamorpha -
Miacis exiguus Matthew and Granger 1915 placental
probably OK, see Gingerich 1983a
 Perissodactyla -
Cardiolophus radinskyi6 Gingerich 1991 odd-toed ungulate
 Perissodactyla - Equidae
"Arenahippus grangeri" = Sifrhippus grangeri5
"Arenahippus grangeri" = Sifrhippus grangeri5 Gingerich 1989 horse
 Theriamorpha - Phenacodontidae
Copecion ? brachypternus1 Cope 1882 condylarth
Ectocion osbornianus10 Cope 1882 condylarth
Phenacodus intermedius Granger 1915 condylarth
Phenacodus vortmani19 Cope 1880 condylarth
 Artiodactyla - Diacodexeidae
Bunophorus robustus18 Sinclair 1914 even-toed ungulate
apparently described by McKenna as "Wasatchia sp.," but not on his list
Diacodexis primus13 Krishtalka and Stucky 1985 even-toed ungulate
 Theriamorpha - Geolabididae
Centetodon sp.1 Marsh 1872 placental
 Theriamorpha - Nyctitheriidae
? Nyctitherium sp. Marsh 1872 placental
definitely not Marsholestes
 Theriamorpha -
Dartonius jepseni1 McKenna 1960 placental
 Theriamorpha - Peradectidae
Peradectes protinnominatus n. sp. McKenna 1960 marsupial
 Multituberculata -
Neoliotomus ultimus Granger and Simpson 1928 multituberculate
 Multituberculata - Neoplagiaulacidae
Ectypodus tardus12 Jepsen 1940 multituberculate
Parectypodus lunatus12 Krause 1982 multituberculate