Yen locality W2 (Eocene of the United States)

Where: Hot Springs County, Wyoming (44.0° N, 108.5° W: paleocoordinates 48.8° N, 91.5° W)

• coordinate stated in text

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

• no formation given in original publication, but area now mapped as Willwood Formation

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: T.-C. Yen. 1948. Eocene fresh-water Mollusca from Wyoming. Journal of Paleontology 22(5):634-640 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 191220: authorized by Patricia Holroyd, entered by Patricia Holroyd on 16.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Unionida - Unionidae
Unio washakiensis freshwater mussel
Unio sp. Philipsson 1788 freshwater mussel
 Architaenioglossa - Viviparidae
 Sorbeoconcha - Pleuroceridae
 Basommatophora - Physidae
Physa sp. Draparnaud 1801 pulmonate