Henry's Fork Hill (Bridger C): Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli - Urodela
Siren dunni n. sp. Goin and Auffenberg 1957
Goin and Auffenberg 1957
1873 O. C. Marsh collection from "Cottonwood White Layer; Henry's Fork" (possibly Bridger B or D instead)
Mammalia - Dinocerata - Uintatheriidae
Uintatherium anceps (Marsh 1871)
Wheeler 1961
Bridger C3, C4, C5
Mammalia - Primates - Notharctidae
Notharctus robustior Leidy 1872
Granger and Gregory 1917
Bridger C4
Mammalia - Primates - Omomyidae
Hemiacodon sp. Marsh 1872
Simpson 1940
"Upper Bridger, C5, on Henry's Fork": implicitly identified with H. gracilis
Mammalia - Perissodactyla - Brontotheriidae
Manteoceras manteoceras (Matthew 1899)
Osborn 1929
    = Telmatherium manteoceras Matthew 1899
Alroy 2002
original and current combination Palaeosyops manteoceras
Bridger C5
Palaeosyops leidyi n. sp. Osborn 1908
Osborn 1908
    = Palaeosyops robustus Marsh 1872
Alroy 2002
see also Osborn 1929, who lists material from Henry's Fork Hill, Bridger C3; questionably referred specimen from C2; and other material of "P.
Palaeosyops robustus n. sp. (Marsh 1872)
Gunnell and Yarborough 2000
see also Osborn 1929
Limnohyops laticeps (Leidy 1872)
Osborn 1929
(6 measurements)
    = Palaeosyops laticeps Leidy 1872
Alroy 2002
synonym of Palaeosyops robustus
"level C 4"; figured but not discussed in text
Mammalia - Perissodactyla - Hyrachyidae
Hyrachyus eximius Leidy 1871
Wood 1934
Bridger C4, and "H. princeps" from C5
Mammalia - Homacodontidae
Homacodon vagans Marsh 1872
West 1984
C5
Microsus cuspidatus Leidy 1870
West 1984
Bridger C5 (1 measurement)
Mammalia - Creodonta
Phenacops incerta n. sp. Matthew 1909
    = Didelphodus altidens Marsh 1872
Alroy 2002
from Bridger C4; Henry's Fork area according to McKenna et al. 1962
Mammalia
Uintacyon jugulans n. sp. Matthew 1909
Bridger C4
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus lepidus n. sp. Matthew 1909
"Horizon C"; Henry's Fork area according to Gazin 1976
Mammalia - Apatemyidae
Apatemys bellulus n. sp. Marsh 1872
of Marsh from Bridger C; Henry's Fork area according to Gazin 1958a
Reptilia - Testudines
Anosteira ornata Leidy 1871
Hay 1908 1 specimen
AMNH 6132, partial carapace: third division of level C, collected in 1905
Reptilia
Tinosaurus stenodon n. gen., n. sp. Marsh 1872
Marsh 1872 1 specimen
Yale University Museum, cat. no. 615 (holotype), portion of right dentary with two complete teeth and basal portion of a third
Reptilia - Anguidae
Glyptosaurus sp. Marsh 1871
ElShafie 2024 1 specimen
AMNH 2242
Reptilia
Crocodylus cf. affinis Marsh 1871
Mook 1921
nomen dubium belonging to Crocodylus
C4 (1 measurement)
see common names

Geography
Country:United States State/province:Wyoming County:Sweetwater
Coordinates: 41.7° North, 109.0° West (view map)
Paleocoordinates:45.6° North, 95.1° West
Basis of coordinate:based on political unit
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2
*Period:Tertiary
Key time interval:Bridgerian
Age range of interval:50.30000 - 46.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Bridger Member:upper
Local section:Bridg 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
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:not the same as North of Cedar Mountain (see)
Metadata
Also known as:Cedar Mountain; Henry's Fork Table
Database number:16235
Authorizer:J. Alroy, P. Barrett, R. Benson, P. Holroyd Enterer:J. Alroy, T. Cleary, P. Holroyd, R. Benson
Modifier:M. Uhen Research group:vertebrate
Created:2002-05-15 00:00:00 Last modified:2013-08-13 08:11:32
Access level:the public Released:2002-05-15 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

7017. W. D. Matthew. 1909. The Carnivora and Insectivora of the Bridger Basin, middle Eocene. Memoirs of the American Museum of Natural History 9:289-567 [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]
47930 V. Buffrenil and E. Buffetaut. 1981. Skeletal growth lines in an Eocene crocodilian skull from Wyoming as an indicator of ontogenic age and paleoclimatic conditions. Journal of Vertebrate Paleontology 1(1):57-65 [M. Uhen/M. Uhen]
87093 S. J. ElShafie. 2024. Body size estimation from isolated fossil bones reveals deep time evolutionary trends in North American lizards. PLoS ONE 19(1:e0296318):1-25 [P. Holroyd/P. Holroyd/P. Holroyd]
14538 C. W. Gilmore. 1928. Fossil lizards of North America. Memoirs of the National Academy of Sciences 22(3):1-201 [J. Head/J. Head/M. Carrano]
25642 C. J. Goin and W. Auffenberg. 1957. A new fossil salamander of the genus Siren from the Eocene of Wyoming. Copeia 1957(2):83-85 [J. Alroy/J. Alroy]
1698 W. Granger and W. K. Gregory. 1917. A revision of the Eocene primates of the genus Notharctus. Bulletin of the American Museum of Natural History 37(34) [J. Alroy/J. Alroy/J. Ju]
1748 G. F. Gunnell and V. L. Yarborough. 2000. Brontotheriidae (Perissodactyla) from the late early and middle Eocene (Brigerian), Wasatch and Bridger formations, southern Green River Basin, southwestern Wyoming. Journal of Vertebrate Paleontology 20(2):349-368 [J. Alroy/J. Alroy/J. Marcot]
14442ETE O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568 [M. Carrano/M. Carrano/M. Carrano]
69854 O. C. Marsh. 1872. Preliminary description of new Tertiary reptiles. Part I and Part II. The American Journal of Science, series 3 4(22):298-309 [M. Carrano/M. Carrano/M. Carrano]
23586 C. C. Mook. 1921. Description of a skull of a Bridger crocodilian. Bulletin of the American Museum of Natural History 44(11):111-116 [J. Alroy/J. Alroy]
2700 H. F. Osborn. 1908. New or little known titanotheres from the Eocene and Oligocene. Bulletin of the American Museum of Natural History 24(32):599-617 [J. Alroy/J. Alroy]
2708 H. F. Osborn. 1929. New Eurasiatic and American proboscideans. American Museum Novitates 393:1-22 [J. Alroy/J. Alroy/M. Carrano]
29655 G. G. Simpson. 1940. Studies on the earliest primates. Bulletin of the American Museum of Natural History 77(4):185-212 [J. Alroy/J. Alroy]
3606 R. M. West. 1984. Paleontology and Geology of the Bridger Formation, Southern Green River Basin, Southwestern Wyoming. Part 7. Survey of Bridgerian Artiodactyla, including description of a skull and partial skeleton of Antiacodon pygmaeus. Milwaukee Public Museum Contributions in Biology and Geology 56:1-47 [J. Alroy/J. Alroy/J. Marcot]
3622 W. H. Wheeler. 1961. Revision of the Uintatheres. Peabody Museum of Natural History Bulletin 14:1-93 [J. Alroy/J. Alroy/M. Uhen]
3744 H. E. Wood. 1934. Revision of the Hyrachyidae. Bulletin of the American Museum of Natural History 67(5):181-295 [J. Alroy/J. Alroy/J. Marcot]