Flagstaff Rim V: 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 1 specimen
AMNH Frick collection no. 8706, incomplete skull, jaws, and anterior trunk region with osteoderms
cf. Helodermoides tuberculatus Douglass 1903
Sullivan 1979 1 specimen
AMNH Frick collection no. 8696, body osteoderms
Reptilia - Rhineuridae
Spathorhynchus natronicus Berman 1977
Berman 1977
Holotype from "South Fork of Lone Tree Guclh of the Flagstaff Rim area, SE1/4 sec. 27, T31N, R83W, Natrona Co., Wyoming, White River Formation, 30 ft. below Ash G. (see Emry, 1973, for detailed stratigraphic and locality data). Chadronian, Early Oligocene" (p.987)
Mammalia - Macroscelidea - Amphilemuridae
Mammalia - Epoicotheriidae
Epoicotherium cf. unicum (Douglass 1905)
Mammalia - Creodonta - Hyaenodontidae
Hyaenodon montanus Douglass 1902
Mammalia - Carnivora - Nimravidae
Dinictis sp. (Leidy 1854)
Hoplophoneus oharrai Jepsen 1926
Mammalia - Carnivora - Amphicyonidae
Daphoenocyon sp. Hough 1948
    = Brachyrhynchocyon sp. Scott and Jepsen 1936
Alroy 2002
Mammalia - Carnivora - Ursidae
Parictis sp. Scott 1893
assigned to "Subparictis" by Baskin and Tedford 1996
Mammalia - Carnivora - Canidae
Hesperocyon paterculus (Matthew 1903)
synonym of Hesperocyon gregarius
specimens listed by Wang 1994 from 10 ft above Ash F and 30 and 35 ft below Ash G
Mammalia - Perissodactyla - Equidae
Mesohippus sp. Marsh 1875
    = Equidae indet. Gray 1821
Alroy 2002
Mammalia - Perissodactyla - Rhinocerotidae
? Trigonias sp. Lucas 1900
Mammalia - Perissodactyla - Hyracodontidae
Hyracodon cf. priscidens Lambe 1905
Mammalia - Perissodactyla - Brontotheriidae
Brontotheriidae indet. (Marsh 1873)
Mammalia - Oromerycidae
Eotylopus reedi Matthew 1910
Mammalia - Camelidae
Poebrotherium sp. Leidy 1847
    = Poebrotherium wilsoni Leidy 1847
Prothero 1996
Mammalia - Merycoidodontidae
Megabathygenys goorisi Schultz and Falkenbach 1968
    = Bathygenys alpha Douglass 1902
Schultz and Falkenbach 1968
from 30' below Ash G, divide between South Fork and Lone Tree Gulch
Bathygenys alpha Douglass 1902
    = Bathygenys hedlundae Schultz and Falkenbach 1968
Alroy 2002
original and current combination Bathygenys alpha hedlundae
includes type of "Bathygenys alpha hedlundae": of Schultz and Falkenbach 1968 from "25' below ash G South Fork, Lone Tree Gulch"; referred specimens from 20, 25, and 35' below Ash G, and 40' above Ash F, various Lone Tree and Blue Gulch localities; and their "Parabathygenys paralpha" type from "25' below ash G, West Fork, Blue Gulch"
Merycoidodon forsythae Schultz and Falkenbach 1968
recombined as Miniochoerus forsythae
Mammalia - Entelodontidae
Archaeotherium cf. coarctatum (Cope 1889)
Mammalia - Protoceratidae
Pseudoprotoceras longinaris Cook 1934
Mammalia - Hypisodontidae
Hypisodus sp. Cope 1873
Mammalia - Leptomerycidae
Leptomeryx mammifer Cope 1885
Leptomeryx speciosus Lambe 1908
Mammalia - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981
Mammalia - Apternodontidae
Apternodus gregoryi Schlaikjer 1933
Apternodus brevirostris Schlaikjer 1934
Mammalia - Rodentia - Sciuridae
? Protosciurus jeffersoni (Douglass 1902)
recombined as Douglassciurus jeffersoni
Mammalia - Rodentia - Ischyromyidae
Titanotheriomys veterior (Matthew 1903)
original and current combination Ischyromys veterior
Mammalia - Rodentia - Castoridae
Agnotocastor galushai n. sp. Emry 1972
see Emry 1972
Mammalia - Rodentia
Meliakrouniomys skinneri Emry 1972
Mammalia - Rodentia - Cylindrodontidae
Cylindrodon cf. nebraskensis Hough and Alf 1956
    = Cylindrodon solarborus n. sp. Emry and Korth 1996
Emry and Korth 1996
from 121.9 m level at South Fork of Lone Tree Gulch
Mammalia - Lagomorpha - Leporidae
Megalagus brachyodon (Matthew 1903)
Palaeolagus temnodon Douglass 1902
Chadrolagus emryi Gawne 1978
Mammalia - Didelphimorphia - Didelphidae
Peratherium sp. Aymard 1850
    = Didelphidae indet. Gray 1821
Alroy 2002
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
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:5
Local order:bottom to top
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:114-134 m, Ash F - Ash G
Metadata
Also known as:South Fork of Lone Tree Gulch
Database number:16964
Authorizer:J. Alroy, P. Barrett, C. Bell Enterer:J. Alroy, T. Cleary, C. Bell
Modifier:T. Cleary Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2016-07-22 10:14:34
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
18264 D. S. Berman. 1977. Spathorhynchus natronicus, a new species of rhineurid amphisbaenian (Reptilia) from the Early Oligocene of Wyoming. Journal of Paleontology 51(5):986-991 [C. Bell/C. Bell]
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]
6324 M. J. Novacek. 2000. Personal communication regarding leptictid identifications. [J. Alroy/J. Alroy/J. Alroy]
28055% 6280D. R. Prothero. 1996. Camelidae. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 609-651 [J. Alroy/J. Alroy/J. Marcot]
3069 C. B. Schultz and C. H. Falkenbach. 1968. The Phylogeny of the Oreodonts. Part 1: Merycoidodontinae, Eporeodontinae, and Leptaucheniinae, Three Subfamilies Of Oreodonts, With an Appendix to the Revision Of The Merycoidodontidae, and Part 2. Summary and Conclusions Concerning the Merycoidodontidae. Bulletin of the American Museum of Natural History 139:1-498 [J. Alroy/J. Alroy/J. Marcot]
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]