PBDB Collection

Henry's Fork Hill (Bridger C) (Eocene of the United States)

Also known as Cedar Mountain; Henry's Fork Table

Where: Sweetwater County, Wyoming (41.7° N, 109.0° W)

• Paleocoordinates: 49.0° N, 85.5° W (Wright 2013)

• coordinate based on political unit

When: upper Member (Bridger Formation), Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16235: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Roger Benson, Terri Cleary and Patricia Holroyd

Creative Commons license: CC0 (CC0)

Taxonomic list

• not the same as North of Cedar Mountain (see)

Show authors, comments, and common names

Amphibia
Caudata - Urodela	Siren dunni n. sp.³ Siren dunni n. sp.³ Goin and Auffenberg 1957 siren 1873 O. C. Marsh collection from "Cottonwood White Layer; Henry's Fork" (possibly Bridger B or D instead)
Mammalia
Soricomorpha - Geolabididae	"Didelphodus altidens" = Centetodon altidens¹ "Didelphodus altidens" = Centetodon altidens¹ Marsh 1872 placental
Artiodactyla - Homacodontidae	Homacodon vagans¹⁰, Microsus cuspidatus¹⁰ Homacodon vagans¹⁰ Marsh 1872 even-toed ungulate C5 Microsus cuspidatus¹⁰ Leidy 1870 even-toed ungulate Bridger C5
Perissodactyla - Brontotheriidae	"Palaeosyops robustus n. sp." = Palaeosyops robustus⁵, "Palaeosyops robustus" = Palaeosyops robustus¹, "Palaeosyops laticeps" = Palaeosyops robustus¹, "Telmatherium manteoceras" = Telmatherium validus¹ "Palaeosyops robustus n. sp." = Palaeosyops robustus⁵ Marsh 1872 brontothere see also Osborn 1929 "Palaeosyops robustus" = Palaeosyops robustus¹ Marsh 1872 brontothere "Palaeosyops laticeps" = Palaeosyops robustus¹ Marsh 1872 brontothere "Telmatherium manteoceras" = Telmatherium validus¹ Marsh 1872 brontothere
Perissodactyla - Hyrachyidae	Hyrachyus eximius¹² Hyrachyus eximius¹² Leidy 1871 odd-toed ungulate Bridger C4, and "H. princeps" from C5
Ferae -	Uintacyon jugulans n. sp. Uintacyon jugulans n. sp. Matthew 1909 placental Bridger C4
Primates - Notharctidae	Notharctus robustior⁴ Notharctus robustior⁴ Leidy 1872 primate Bridger C4
Primates - Omomyidae	Hemiacodon sp.⁹ Hemiacodon sp.⁹ Marsh 1872 tarsier "Upper Bridger, C5, on Henry's Fork": implicitly identified with H. gracilis
Condylarthra - Hyopsodontidae	Hyopsodus lepidus n. sp. Hyopsodus lepidus n. sp. Matthew 1909 condylarth "Horizon C"; Henry's Fork area according to Gazin 1976
Cimolesta - Apatemyidae	Apatemys bellulus n. sp. Apatemys bellulus n. sp. Marsh 1872 eutherian of Marsh from Bridger C; Henry's Fork area according to Gazin 1958a
Dinocerata - Uintatheriidae	Uintatherium anceps¹¹ Uintatherium anceps¹¹ Marsh 1871 uintathere Bridger C3, C4, C5
Reptilia
Testudines - Carettochelyidae	Anosteira ornata⁶ Anosteira ornata⁶ Leidy 1871 turtle AMNH 6132, partial carapace: third division of level C, collected in 1905
Crocodylia - Crocodylidae	Crocodylus cf. affinis⁸ Crocodylus cf. affinis⁸ Marsh 1871 crocodile C4
Squamata -	Tinosaurus stenodon n. gen. n. sp.⁷ Tinosaurus stenodon n. gen. n. sp.⁷ Marsh 1872 squamates Yale University Museum, cat. no. 615 (holotype), portion of right dentary with two complete teeth and basal portion of a third
Squamata - Anguidae	Glyptosaurus sp.² Glyptosaurus sp.² Marsh 1871 squamates AMNH 2242

¹Alroy 2002; ²ElShafie 2024; ³Goin and Auffenberg 1957; ⁴Granger and Gregory 1917; ⁵Gunnell and Yarborough 2000; ⁶Hay 1908; ⁷Marsh 1872; ⁸Mook 1921; ⁹Simpson 1940; ¹⁰West 1984; ¹¹Wheeler 1961; ¹²Wood 1934