Flagstaff Rim II: Chadronian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
informal Novacek leptictid acutidens
Novacek 2000
pers. commun. 16.2.00: "Frictops emryi"
Reptilia - Anguidae
Helodermoides tuberculatus Douglass 1903
Sullivan 1979 2 specimens
AMNH Frick collection no. 9166, disarticulated skull and skeleton; USNM 214735, crushed right maxilla and dentary, fragments of skull and osteoderms
cf. Helodermoides tuberculatus Douglass 1903
Sullivan 1979 3 specimens
USNM 215096, body osteoderm; 215137, cephalic and body osteoderms; 244220, partial skull
Mammalia - Apatemyidae
Sinclairella sp. Jepsen 1934
Emry 1992
Mammalia - Chiroptera
Chiroptera indet. Blumenbach 1779
Emry 1992
a bat
Mammalia - Pholidota - Patriomanidae
Patriomanis americanus Emry 1970
Emry 1992
corrected as Patriomanis americana
Mammalia - Epoicotheriidae
Epoicotherium cf. unicum (Douglass 1905)
Emry 1992
Mammalia - Creodonta - Hyaenodontidae
Hyaenodon vetus Stock 1933
Emry 1992
Mammalia - Carnivora - Amphicyonidae
Daphoenocyon sp. Hough 1948
    = Brachyrhynchocyon sp. Scott and Jepsen 1936
Alroy 2002
Daphoenictis sp. Hunt 1974
Emry 1992
Mammalia - Carnivora - Ursidae
? Parictis sp. Scott 1893
    = Subparictis parvus Clark and Beerbower 1967
Baskin and Tedford 1996
original and current combination Parictis parvus
Mammalia - Carnivora - Canidae
Hesperocyon sp. Scott 1890
"ref 6294: not documented as H. gregarius by Wang 1994"
    = Hesperocyon paterculus Matthew 1903
Emry 1992
synonym of Hesperocyon gregarius
Mammalia - Perissodactyla - Equidae
Mesohippus sp. Marsh 1875
Emry 1992
    = Equidae indet. Gray 1821
Alroy 2002
Mammalia - Perissodactyla - Rhinocerotidae
? Trigonias sp. Lucas 1900
Emry 1992
Caenopus dakotensis Peterson 1920
Emry 1992
recombined as Penetrigonias dakotensis
Mammalia - Perissodactyla
Toxotherium hunteri Wood 1961
Mammalia - Perissodactyla - Hyracodontidae
Hyracodon sp. Leidy 1856
see also Prothero 1996e
    = Hyracodon cf. priscidens Lambe 1905
Emry 1992
Mammalia - Perissodactyla - Brontotheriidae
Brontotheriidae indet. (Marsh 1873)
Emry 1992
Mammalia - Oromerycidae
Eotylopus reedi Matthew 1910
Emry 1992
Mammalia - Camelidae
Poebrotherium sp. Leidy 1847
Mammalia - Merycoidodontidae
Bathygenys sp. Douglass 1902
Emry 1992
Merycoidodon sp. Leidy 1848
    = Merycoidodon lewisi Clark and Beerbower 1967
Emry 1992
    = Merycoidodon culbertsoni Leidy 1848
Alroy 2002
original and current combination Merycoidodon culbertsonii
Mammalia - Protoceratidae
Leptotragulus profectus Matthew 1903
Emry 1992
recombined as Trigenicus profectus
Mammalia - Hypisodontidae
Hypisodus sp. Cope 1873
Mammalia - Praetragulidae
Parvitragulus priscus Emry 1978
Emry 1992
Mammalia - Leptomerycidae
Leptomeryx sp. Leidy 1853
"D"
    = Leptomeryx mammifer Cope 1885
Emry 1992
confirmed by Heaton and Emry 1996
Leptomeryx sp. Leidy 1853
"B"
    = Leptomeryx speciosus Lambe 1908
Emry 1992
confirmed by Heaton and Emry 1996
Mammalia - Agriochoeridae
Agriochoerus sp. Leidy 1850
said to be new
Mammalia - Leptochoeridae
Stibarus sp. Cope 1873
Emry 1992
Mammalia - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981
Emry 1992
Mammalia - Oligoryctidae
Oligoryctes cf. altitalonidus (Clark 1936)
    = Oligoryctes altitalonidus Clark 1936
Alroy 2002
Mammalia - Rodentia - Sciuridae
Protosciurus sp. Black 1963
see also Emry and Thorington 1984
    = ? Protosciurus jeffersoni Douglass 1902
Emry 1992
    = Douglassciurus jeffersoni Douglass 1902
Alroy 2002
Mammalia - Rodentia - Ischyromyidae
Ischyromys sp. Leidy 1856
"or Titanotheriomys"
    = Ischyromys veterior Matthew 1903
Alroy 2002
Mammalia - Rodentia - Eutypomyidae
Eutypomys sp. Matthew 1905
Emry 1992
    = Eutypomyidae indet. Miller and Gidley 1918
Alroy 2002
    = Eutypomys parvus Lambe 1908
Emry and Korth 2012
Mammalia - Rodentia - Heliscomyidae
Heliscomys sp. Cope 1873
Little Lone Tree Gulch
    = Heliscomys ostranderi Korth et al. 1991
Korth et al. 1991
Mammalia - Rodentia - Eomyidae
Aulolithomys vexilliames Korth and Emry 1997
Emry and Korth 2012
B Minus 44’ Quarry
Aulolithomys sp. Black 1965
    = Aulolithomys bounites Black 1965
Emry 1992
Metanoiamys paradoxus Emry and Korth 2012
Emry and Korth 2012
B Minus 44’ Quarry; possibly type locality
cf. Yoderimys sp. Wood 1955
(3 measurements)
    = Zemiodontomys burkei Black 1965
Alroy 2002
described by Emry and Korth 1993; B Minus 44' Quarry
Adjidaumo sp. Hay 1899
    = Adjidaumo cf. minimus Matthew 1903
Emry 1992
    = Adjidaumo minimus Matthew 1903
Emry and Korth 2012
? Namatomys sp. Black 1965
    = Namatomys lloydi Black 1965
Emry 1992
this is the "true" Namatomys"
Paradjidaumo sp. Burke 1934
    = Paradjidaumo cf. trilophus Cope 1873
Emry 1992
    = Paradjidaumo hansonorum Russell 1972
Emry and Korth 2013
Protadjidaumo burkei Russell 1954
Emry 1992
    = Adjidaumo ? burkei Russell 1954
Alroy 2002
    = Paradjidaumo hansonorum Russell 1972
Emry and Korth 2013
Mammalia - Rodentia - Sciuravidae
? Pauromys sp. Troxell 1923
Emry 1992
Mammalia - Rodentia - Cylindrodontidae
Cylindrodon sp. Douglass 1902
    = Cylindrodon fontis Douglass 1902
Emry 1992
    = Cylindrodon natronensis Emry and Korth 1996
Emry and Korth 1996
Mammalia - Didelphimorphia - Didelphidae
Peratherium sp. Aymard 1850
    = Didelphidae indet. Gray 1821
Alroy 2002
Mammalia - Multituberculata - Neoplagiaulacidae
Ectypodus lovei (Sloan 1966)
Emry 1992
see common names

Geography
Country:United States State/province:Wyoming County:Natrona
Coordinates: 43.2° North, 107.1° West (view map)
Paleocoordinates:44.8° North, 98.4° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Priabonian 10 m.y. bin:Cenozoic 3
*Period:Tertiary
Key time interval:Chadronian
Age range of interval:37.20000 - 33.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:White River
Local section:WRGWY Local bed:2
Local order:bottom to top
Stratigraphic resolution:member
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Taxonomic list comments:25-54 m, below Ash B
includes Little Lone Tree Gulch assemblage of Emry 1979 from "44 feet below Ash B" = B Minus 44' Quarry
following species are listed in Emry 1979 but not in Emry pers. comm.: cf. "Ictops" acutidens (apparently = "Frictops emryi") Apternodus sp. - not altitalonidus Heliscomys sp. Palaeolagus sp.
Metadata
Also known as:Little Lone Tree Gulch; "44 feet below Ash B" = B Minus 44' Quarry
Database number:16961
Authorizer:J. Alroy, P. Barrett, J. Marcot, P. Holroyd Enterer:J. Alroy, T. Cleary, P. Holroyd, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2004-03-23 17:09:00
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

1437. R. J. Emry. 1979. Review of Toxotherium (Perissodactyla: Rhinocerotoidea) with new material from the early Oligocene of Wyoming. Proceedings of the Biological Society of Washington 92(1):28-41 [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]
1034 J. A. Baskin and R. H. Tedford. 1996. Small Arctoid and Feliform Carnivorans. In D. R. Prothero and R. M. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 486-497 [J. Alroy/J. Alroy/J. Marcot]
1442 R. J. Emry. 1992. Mammalian Range Zones in the Chadronian White River Formation at Flagstaff Rim, Wyoming. In D. R. Prothero, W. A. Berggren (eds.), Eocene-Oligocene Climatic and Biotic Evolution 106-115 [J. Alroy/J. Alroy/M. Uhen]
1451 R. J. Emry and W. W. Korth. 1996. Cylindrodontidae. In D. R. Prothero, R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America [J. Alroy/J. Alroy/M. Uhen]
57381 R. J. Emry and W. W. Korth. 2012. Early Chadronian (late Eocene) rodents from the Flagstaff Rim area, central Wyoming. Journal of Vertebrate Paleontology 32(2):419-432 [J. Marcot/J. Marcot]
87100 R. J. Emry and W. W. Korth. 2013. The eomyid rodent Paradjidaumo Burke from the late Eocene White River Formation, Flagstaff Rim area, Wyoming. Proceedings of the Biological Society of Washington 126(2):178-186 [P. Holroyd/P. Holroyd]
2153 W. W. Korth, J. H. Wahlert, and R. J. Emry. 1991. A New Species of Heliscomys and Recognition of the Family Heliscomyidae (Geomyoidea: Rodentia). Journal of Vertebrate Paleontology 11(2):247-256 [J. Alroy/J. Alroy/J. Marcot]
6324 M. J. Novacek. 2000. Personal communication regarding leptictid identifications. [J. Alroy/J. Alroy/J. Alroy]
60385 R. M. Sullivan. 1979. Revision of the Paleogene genus Glyptosaurus (Reptilia, Anguidae). Bulletin of the American Museum of Natural History 163(1):1-72 [P. Barrett/T. Cleary]