Y2K Quarry: Tiffanian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Multituberculata
Multituberculata indet. Cope 1884
Mammalia - Multituberculata - Microcosmodontidae
Microcosmodon conus Jepsen 1930
Secord 2008
Mammalia - Multituberculata - Neoplagiaulacidae
Parectypodus laytoni (Jepsen 1940)
Secord 2008
original and current combination Ectypodus laytoni
Ectypodus powelli Jepsen 1940
Mammalia - Multituberculata - Ptilodontidae
Prochetodon cavus Jepsen 1940
Secord 2008
Mammalia - Leptictidae
Prodiacodon sp. Matthew 1929
    = Prodiacodon cf. tauricinerei Jepsen 1930
Secord 2008
based on multiple specimens, mainly isolated teeth
Palaeictops sp. Matthew 1899
    = cf. Palaeictops sp. Matthew 1899
Secord 2008
Based on UM 109256, RP3/
Mammalia - Primates - Microsyopidae
Arctodontomys sp. Gunnell 1985
Secord 2008
Based on UM 110977, RM2/
Mammalia - Primates - Micromomyidae
Micromomys sp. Szalay 1973
said to be new
    = Micromomys millennius n. sp. Secord 2008
Secord 2008
recombined as Dryomomys millennius
Mammalia - Primates - Paromomyidae
Phenacolemur pagei Jepsen 1930
    = Dillerlemur pagei Jepsen 1930
Alroy 2002
    = Phenacolemur pagei Jepsen 1930
Secord 2008
recombined as Dillerlemur pagei
No published evidence for Ignacius at Y2K Quarry
Mammalia - Primates - Plesiadapidae
Plesiadapis fodinatus Jepsen 1930
    = Plesiadapis cf. dubius Matthew 1915
Secord 2008
Mammalia - Primates - Carpolestidae
Carpolestes dubius Jepsen 1930
Mammalia - Erinaceidae
Litolestes sp. Jepsen 1930
    = Litolestes ignotus Jepsen 1930
Secord 2008
Mammalia - Nyctitheriidae
cf. Leptacodon sp. Matthew and Granger 1921
    = Leptacodon packi Jepsen 1930
Secord 2008
Leptacodon packi Jepsen 1930
Secord 2008
Plagioctenodon sp. Bown 1979
Mammalia - Phenacodontidae
Ectocion mediotuber Thewissen 1990
Secord 2008
Mammalia - Procreodi - Arctocyonidae
Arctocyon cf. nexus (Gazin 1956)
Secord 2008
Claenodon sp. Scott 1892
Princetonia cf. yalensis Gingerich 1989
Secord 2008
Mammalia - Viverravidae
Viverravus schaffi (Gingerich and Winkler 1985)
Secord 2008
Based on UM 109185, LM/1; UM 109327, LM/2; UM 109484, RM/1
Mammalia - Metacheiromyidae
Metacheiromyidae indet. Wortman 1903
said to be new (4 measurements)
    = Mylanodon rosei n. gen., n. sp. Secord et al. 2002
Secord et al. 2002
Mammalia - Macroscelidea
Diacocherus sp. Gingerich 1983
    = Adunator minutus Jepsen 1930
Secord 2008
Mammalia - Proteutheria - Palaeoryctidae
Palaeoryctes sp. Matthew 1913
said to be new
    = Palaeoryctes jepseni n. sp. Bloch et al. 2004
Bloch et al. 2004
Mammalia - Apatemyidae
Apatemyidae indet. Matthew 1909
    = Labidolemur soricoides Matthew and Granger 1921
Secord 2008
Based on UM 109192, LI2/; UM 109282, LI1/
see common names

Geography
Country:United States State/province:Wyoming County:Park
Coordinates: 44.3° North, 109.0° West (view map)
Paleocoordinates:50.2° North, 88.7° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Paleocene
10 m.y. bin:Cenozoic 1
*Period:Early/Lower Tertiary *Epoch:Late/Upper Paleocene
*Local age/stage:Late/Upper Tiffanian
Key time interval:Tiffanian
Age range of interval:61.70000 - 56.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Fort Union
Local section:Clark Local bed:760 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: from "a thin (2-12 cm) siltstone layer" between Princeton Quarry (680 m level) and Holly's Microsite (1280 m level) and in the "upper part of the Plesiadapis simonsi Zone," which ranges from below 680 m to about 960 m (see Rose 1981); placed at "80 m stratigraphically above Princeton Quarry" (i.e., 760 m) by Secord et al. 2002
Lithology and environment
Primary lithology: siltstone
Lithology description: "siltstone"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Articulated whole bodies:none
Associated major elements:none
Disassociated major elements:some
Disassociated minor elements:many
Collection methods and comments
Collection methods:bulk,selective quarrying,sieve,field collection
Collection size:363 specimens
Reason for describing collection:paleoecologic analysis
Collection method comments: "98 mammalian jaws and jaw fragments, and 265 isolated teeth"
Metadata
Database number:26569
Authorizer:J. Alroy, K. Beard, P. Holroyd Enterer:J. Alroy, P. Holroyd, K. Beard
Modifier:J. Alroy Research group:vertebrate
Created:2002-10-17 20:15:29 Last modified:2003-01-19 19:46:57
Access level:the public Released:2002-10-17 20:15:29
Creative Commons license:CC BY
Reference information

Primary reference:

7301. R. Secord. 2002. The Y2K Quarry, a new diverse latest Tiffanian (late Paleocene) mammalian assemblage from the Fort Union Formation in the northern Bighorn Basin, Wyoming. Journal of Vertebrate Paleontology 22(3):105A [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
63128 J. I. Bloch, R. Secord, and P. D. Gingerich. 2004. Systematics and phylogeny of late Paleocene and early Eocene Palaeoryctinae (Mammalia, Insectivora) from the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 31(5):119-154 [K. Beard/K. Beard]
63104 R. Secord. 2008. The Tiffanian Land-Mammal Age (middle and late Paleocene) in the northern Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology 35:1-192 [K. Beard/K. Beard]
7666 R. Secord, P. D. Gingerich, and J. I. Bloch. 2002. Mylanodon rosei, a new metacheiromyid (Mammalia, Palaeanodonta) from the late Tiffanian (late Paleocene) of northwestern Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(15):385-399 [J. Alroy/J. Alroy/J. Alroy]