Flagstaff Rim IV: 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"
Mammalia - Didelphimorphia - Didelphidae
Peratherium sp. Aymard 1850
    = Didelphidae indet. Gray 1821
Alroy 2002
Mammalia - Macroscelidea - Amphilemuridae
Mammalia - Chiroptera
Chiroptera indet. Blumenbach 1779
a bat
Mammalia - Perissodactyla - Brontotheriidae
Brontotheriidae indet. (Marsh 1873)
Mammalia - Perissodactyla - Equidae
Mesohippus sp. Marsh 1875
    = Equidae indet. Gray 1821
Alroy 2002
Mammalia - Perissodactyla - Hyracodontidae
Hyracodon cf. priscidens Lambe 1905
Mammalia - Perissodactyla - Rhinocerotidae
? Trigonias sp. Lucas 1900
? Subhyracodon sp. Wood 1927
Mammalia - Entelodontidae
Archaeotherium cf. coarctatum (Cope 1889)
Mammalia - Protoceratidae
Leptotragulus profectus Matthew 1903
recombined as Trigenicus profectus
Pseudoprotoceras longinaris Cook 1934
Mammalia - Hypisodontidae
Hypisodus sp. Cope 1873
Mammalia - Leptomerycidae
Leptomeryx mammifer Cope 1885
Leptomeryx speciosus Lambe 1908
Mammalia - Oromerycidae
Eotylopus reedi Matthew 1910
Mammalia - Camelidae
Poebrotherium sp. Leidy 1847
    = Poebrotherium eximium Hay 1902
Prothero 1996
determinate material is from 15' below Ash F; P. wilsoni also ranges through this interval
Mammalia - Merycoidodontidae
Bathygenys alpha Douglass 1902
    = Bathygenys hedlundae Schultz and Falkenbach 1968
Schultz and Falkenbach 1968
original and current combination Bathygenys alpha hedlundae
"Bathygenys alpha hedlundae": from 20' above Ash D, South Fork of Lone Tree Gulch
Merycoidodon forsythae n. sp. Schultz and Falkenbach 1968
recombined as Miniochoerus forsythae
Mammalia - Leptochoeridae
Stibarus sp. Cope 1873
Mammalia - Carnivora - Nimravidae
Dinictis sp. (Leidy 1854)
Hoplophoneus oharrai Jepsen 1926
    = Hoplophoneus mentalis Sinclair 1921
Alroy 2002
synonym of Hoplophoneus primaevus
Mammalia - Carnivora - Ursidae
Parictis sp. Scott 1893
assigned to "Subparictis" by Baskin and Tedford 1996
Mammalia - Carnivora - Amphicyonidae
Daphoenictis sp. Hunt 1974
discussed by Hunt 1996 and said to be 10' above Ash E
Daphoenocyon sp. Hough 1948
    = Brachyrhynchocyon sp. Scott and Jepsen 1936
Alroy 2002
Mammalia - Carnivora - Canidae
Hesperocyon paterculus (Matthew 1903)
synonym of Hesperocyon gregarius
described by Wang and Tedford 1994; specimens listed by Wang 1994 from 6, 10, 15, 20, and 30 ft above Ash D and both "in Ash F" and "in Titanothere channel (laterally replaced by Ash F"
Mammalia - Pholidota - Patriomanidae
Patriomanis americanus Emry 1970
corrected as Patriomanis americana
Mammalia - Epoicotheriidae
Epoicotherium cf. unicum (Douglass 1905)
Mammalia - Creodonta - Hyaenodontidae
Hyaenodon montanus Douglass 1902
Hyaenodon megaloides Mellett 1977
Hyaenodon mustelinus Scott 1894
Mammalia - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981
Al's Pocket and Jenny's Pocket: Asher et al. 2005
Mammalia - Oligoryctidae
Apternodus altitalonidus Clark 1936
recombined as Oligoryctes altitalonidus
Oligoryctes cameronensis Hough 1956
Mammalia - Apternodontidae
Apternodus brevirostris Schlaikjer 1934
Apternodus gregoryi Schlaikjer 1933
Mammalia - Lagomorpha - Leporidae
Megalagus brachyodon (Matthew 1903)
Palaeolagus temnodon Douglass 1902
Chadrolagus emryi Gawne 1978
Mammalia - Rodentia - Aplodontidae
Prosciurus vetustus (Matthew 1903)
original and current combination Sciurus (Prosciurus) vetustus
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 - Eomyidae
Aulolithomys vexilliames n. sp. Korth and Emry 1997
Korth and Emry 1997
from Jenny's Pocket; "A. sp." (6 measurements)
Paradjidaumo sp. Burke 1934
    = Paradjidaumo nanus n. sp. Emry and Korth 2013
Emry and Korth 2013
Adjidaumo minimus (Matthew 1903)
Namatomys lloydi Black 1965
this is the "true" Namatomys"
Mammalia - Rodentia - Heliscomyidae
Heliscomys sp. Cope 1873
    = Heliscomys ostranderi Korth et al. 1991
Korth et al. 1991
Mammalia - Rodentia - Cylindrodontidae
Cylindrodon cf. nebraskensis Hough and Alf 1956
    = Cylindrodon solarborus Emry and Korth 1996
Emry and Korth 1996
112.8 m level
Cylindrodon fontis Douglass 1902
    = Cylindrodon natronensis Emry and Korth 1996
Emry and Korth 1996
Mammalia - Rodentia
Nonomys simplicidens (Emry and Dawson 1972)
Reptilia - Xantusiidae
Palaeoxantusia cf. borealis Holman 1972
Sullivan and Holman 1996 7 specimens
USNM 214716-214721, 214728
Reptilia - Rhineuridae
Spathorhynchus natronicus Berman 1977
Berman 1977
Paratype specimen (AMNH 8678) from "NE 1/4 sec. 27, T31N, R83W, Middle Fork of Lone Tree Gulch, Natrona Co., Wyoming, White River Formation, 20 ft. below Ash F, Early Oligocene (Chadronian)." (p. 987)
Reptilia - Anguidae
Helodermoides tuberculatus Douglass 1903
Sullivan 1979 2 specimens
AMNH Frick collection no. 8697, incomplete parietal; 8698, incomplete parietal
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:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Priabonian 10 m.y. bin:Cenozoic 3
*Period:Tertiary
Key time interval:Chadronian
Age range of interval:37.00000 - 33.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:White River
Local section:WRGWY Local bed:4
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:Al's Pocket and Jenny's Pocket are from 16 m below Ash F: Korth and Emry 1997b
86-114 m, Ash D - Ash F
Metadata
Also known as:Al's Pocket; Jenny's Pocket; Middle Fork of Lone Tree Gulch
Database number:16963
Authorizer:J. Alroy, P. Barrett, C. Bell, P. Holroyd Enterer:J. Alroy, T. Cleary, C. Bell, P. Holroyd
Modifier:T. Cleary Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2016-07-22 10:13:49
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]
24143 R. J. Asher, R. J. Emry, and M. C. McKenna. 2005. New material of Centetodon (Mammalia, Lipotyphla) and the importance of (missing) DNA sequences in systematic paleontology. Journal of Vertebrate Paleontology 25(4):911-923 [J. Alroy/J. Alroy]
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]
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]
2148 W. W. Korth and R. J. Emry. 1997. A new species of Aulolithomys (Rodentia, Eomyidae) from the Chadronian (late Eocene) of Wyoming. Paludicola 1(3):112-116 [J. Alroy/J. Alroy/M. Uhen]
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]
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]
87102 R. M. Sullivan and J. A. Holman. 1996. Squamata. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 354-372 [P. Holroyd/P. Holroyd]