Big Multi Locality (Paleocene of the United States)

Also known as Big Multi Quarry; CM 2433; UCMP V-76134; ETE Locality 1563

Where: Sweetwater County, Wyoming (41.9° N, 108.6° W: paleocoordinates 47.3° N, 90.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Fort Union Formation, Clarkforkian (56.8 - 55.8 Ma)

• "75-100 m below the base of the Wasatch Fm."

Environment/lithology: "floodplain"; lithified, gray mudstone

• ETE sed env 1: fluvial, ETE sed env 2: overbank ETE event: ., ETE env comment: 0
• ETE rock type adj: "prple,gry,blcky"

Size class: macrofossils

Collection methods: quarrying, surface (float)

• ETE reference list: 980, 979, 978

Primary reference: K. D. Rose. 1981. The Clarkforkian Land-Mammal Age and Mammalian Faunal Composition Across the Paleocene-Eocene Boundary. University of Michigan Papers on Paleontology 26:1-197 [J. Alroy/J. Alroy/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15072: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by K. Christopher Beard and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• work of Krause 1980 appears to postdate that of Rose
Osteichthyes
 Caudata - Urodela
Urodela indet.4 salamander
Mammalia
 Cimolesta - Cyriacotheriidae
Cyriacotherium psamminum6 Rose and Krause 1982 pantodont
 Cimolesta - Palaeoryctidae
Palaeoryctes cf. punctatus6 Van Valen 1966 eutherian
 Cimolesta -
"Esthonyx xenicus" = Azygonyx xenicus3
"Esthonyx xenicus" = Azygonyx xenicus3 Gingerich and Gunnell 1979 tillodont
 Cimolesta - Pantolestidae
Palaeosinopa sp.6 Matthew 1901 eutherian
 Primates - Microsyopidae
Arctodontomys sp. Gunnell 1985 primate
said to be new: Wilf et al. 1998; may include "Navajovius sp." of Gunnell 1989 = "microsyopid near Navajovius" and/or "Niptomomys sp."
Arctodontomys simplicidens6 Rose 1981 primate
 Primates - Plesiadapidae
Chiromyoides sp.6 Stehlin 1916 primate
Plesiadapis dubius Matthew 1915 primate
apparently includes "P. cookei" based on Wilf et al. 1998; however, Dawson and Beard 1996 suggest that the latter is P. gingerichi
Plesiadapis cookei2 Jepsen 1930 primate
 Primates - Carpolestidae
Carpolestes nigridens Simpson 1928 primate
 Primates - Paromomyidae
Dillerlemur cf. pagei1 Jepsen 1930 primate
Phenacolemur cf. simonsi Bown and Rose 1976 primate
cf. Ignacius sp.6 Matthew and Granger 1921 primate
 Primates - Micromomyidae
Tinimomys tribos n. sp.2 Chester and Beard 2012 primate
Dryomomys dulcifer n. sp.2 Chester and Beard 2012 primate
 Dermoptera -
Planetetherium sp.3 Simpson 1928 colugo
 Rodentia - Alagomyidae
Alagomys russelli n. sp.3 Dawson and Beard 1996 rodent
 Rodentia - Ischyromyidae
Paramys adamus n. sp.3 Dawson and Beard 1996 rodent
 Amblypoda - Prodinoceratidae
Probathyopsis cf. harrisorum6 Patterson 1939 uintathere
 Tribosphenida - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
Phenacodus intermedius6 Granger 1915 condylarth
presumably includes "P. primaevus" and "P. vortmani"
 Placentalia -
Lipotyphla indet.6 Haeckel 1866 placental
said to be new and compared to Mckennatherium; conceivably the same as "cf. Cedrocherus sp." of Dawson and Beard 1996, said to be new
 Lipotyphla - Erinaceidae
cf. Leipsanolestes sp. Simpson 1928 hedgehog
said to be new by Wilf et al. 1998
 Tribosphenida - Nyctitheriidae
Limaconyssus sp.6 Gingerich 1987 placental
Wyonycteris sp.6 Gingerich 1987 placental
Plagioctenodon sp.6 Bown 1979 placental
two forms: A (73 specimens) and B (81 specimens)
Ceutholestes sp.6 Rose and Gingerich 1987 placental
this or one of their other lipotyphlan genera replaces "cf. Pontifactor bestiola"
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
Viverravus sp.6 Marsh 1872 placental
 Ferae - Metacheiromyidae
Palaeanodon cf. parvulus6 Matthew 1918 placental
 Macroscelidea - Apheliscidae
Aletodon cf. conardae6 Winterfeld 1982 elephant shrew
cf. Apheliscus nitidus Simpson 1937 elephant shrew
 Macroscelidea -
"Diacocherus minutus" = Adunator minutus6
"Diacocherus minutus" = Adunator minutus6 Jepsen 1930 elephant shrew
 Tribosphenida - Arctocyonidae
Chriacus sp.6 Cope 1883 condylarth
 Theriiformes - Peradectidae
Peradectes protinnominatus6 McKenna 1960 metatherian
 Sarcobora - Apatemyidae
Labidolemur kayi6 Simpson 1929 insectivoran
 Multituberculata - Neoplagiaulacidae
Ectypodus cf. powelli5, "Parectypodus laytoni" = Ectypodus laytoni6
Ectypodus cf. powelli5 Jepsen 1940 multituberculate
"Parectypodus laytoni" = Ectypodus laytoni6 Jepsen 1940 multituberculate
 Multituberculata -
Neoliotomus conventus6 Jepsen 1930 multituberculate
according to Krause 1980, "only specimen of ? Neoliotomus sp., the 'Big Multi,' has been lost"
 Multituberculata - Microcosmodontidae
Microcosmodon conus2 Jepsen 1930 multituberculate
could be M. conus or M. rosei according to Krause 1980, but OK according to Wilf et al. 1998