PBDB Collection

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: 48.5° N, 81.7° W (Wright 2013)

• 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: CC0 (CC0)

Taxonomic list

• 392 m level in local section according to Hill et al. 2000
CM 953 may include other UCMP localities

Show authors, comments, and common names

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

¹Alroy 2002; ²Bown and Gingerich 1972; ³Bown and Rose 1987; ⁴Bown and Schankler 1982; ⁵Froehlich 2002; ⁶Gingerich 1991; ⁷Gingerich and Deutsch 1989; ⁸Gingerich and Simons 1977; ⁹Gunnell 1985; ¹⁰Gunnell 1989; ¹¹Gunnell and Gingerich 1991; ¹²Krause 1982; ¹³Krishtalka and Stucky 1985; ¹⁴Polly 1993; ¹⁵Polly 1997; ¹⁶Redline 1997; ¹⁷Rose 1981; ¹⁸Stucky and Krishtalka 1990; ¹⁹Thewissen 1990