PBDB Collection

Little Dry Creek (Eocene of the United States)

Where: Uinta County, Wyoming (41.2° N, 110.5° W: paleocoordinates 45.2° N, 96.8° W)

• coordinate based on political unit

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

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collection methods: surface (in situ),

Primary reference: J. Leidy. 1873. Part I. Contributions to the extinct vertebrate fauna of the western territories. In F. V. Hayden (ed.), Report of the United States Geological Survey of the Territories 1:1-358 [M. Uhen/M. Uhen/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 16255: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Roger Benson, Terri Cleary and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

• Granger and Gregory 1917 indicate that "Little Dry Creek" of AMNH collection is Dry Creek in Uinta Co. (see); Leidy "Dry Creek" locality is said to be "ten miles from Fort Bridger" by Matthew 1909, which puts it in this county
"Smilodectes gracilis" Gazin 1965a: from low in Bridger B between Little Dry Creek and Big Dry Creek in Sweetwater Co.

Show authors, comments, and common names

Mammalia
Condylarthra - Hyopsodontidae	Hyopsodus minusculus n. sp. Hyopsodus minusculus n. sp. Leidy 1873 condylarth see Matthew 1909; from "Buttes of Dry Creek"; said to be from "Dry Creek" by Redline 1997
Artiodactyla - Helohyidae	Helohyus plicodon⁷ Helohyus plicodon⁷ Marsh 1872 even-toed ungulate AMNH
Artiodactyla - Homacodontidae	Antiacodon pygmaeus⁷ Antiacodon pygmaeus⁷ Cope 1872 even-toed ungulate Bridger B2, AMNH
Theriamorpha -	Vulpavus ovatus n. sp.³ Vulpavus ovatus n. sp.³ Matthew 1909 placental see Matthew 1909
Primates - Notharctidae	Notharctus sp.⁵ Notharctus sp.⁵ Leidy 1870 primate
Reptilia
Squamata - Anguidae	cf. Glyptosaurus sylvestris⁶ cf. Glyptosaurus sylvestris⁶ Marsh 1871 squamates USNM 12845, part of right mandible
Testudinata - Baenidae	"Baena sima n. sp." = Baena arenosa² "Baena sima n. sp." = Baena arenosa² Leidy 1870 turtle AMNH 5971 (type of Baena sima Hay, 1908, figs. 52, 53, pl. 13 figs. 1, 2, pl. 14 fig. 4), skull, shell, postcranium. Bridger B, "from lower brown ss" (label). Collector: Albert Thompson, June 1, 1903.
Testudines - Trionychidae	Trionyx uintaensis n. sp.¹ Trionyx uintaensis n. sp.¹ Cope 1873 softshell turtle ANSP complete carapace (holotype)
Testudines - Geoemydidae	Echmatemys naomi n. sp.⁴ Echmatemys naomi n. sp.⁴ Hay 1908 turtle AMNH 5975 (holotype), a partial carapace (Hay 1908, figs. 442–444, pl. 51)

¹Cope 1873; ²Gaffney 1972; ³Gazin 1976; ⁴Hay 1908; ⁵Robinson 1957; ⁶Sullivan 1979; ⁷West 1984