Haystack Mountain [YPM] (Eocene to of the United States)

Where: Sweetwater County, Wyoming (42.7° N, 109.2° W: paleocoordinates 45.9° N, 96.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bridgerian to Bridgerian (50.3 - 39.7 Ma)

• "light colored clay, 100 feet below horizon of Haystack Butte"

Environment/lithology: terrestrial; claystone

Size class: macrofossils

Collected by J. Heisey; reposited in the YPM

Primary reference: R. W. Shufeldt. 1915. Fossil birds in the Marsh Collection of Yale University. Transactions of the Connecticut Academy of Arts and Sciences 19:1-110 [M. Uhen/M. Uhen/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 224184: authorized by Matthew Carrano, entered by Matthew Carrano on 24.01.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Galliformes - Phasianidae
Phasianus alfhildae n. sp. Shufeldt 1915 pheasant
YPM 947
Aves
 Accipitriformes - Accipitridae
Accipitridae indet. Viellot 1816 hawk
YPM 982 ("A large Eagle related to Haliaeetus leucocephalus?")