UCMP V92002, Lost Creek (Eocene of the United States)

Where: Crook County, Oregon (44.0° N, 120.3° W: paleocoordinates 44.3° N, 108.1° W)

• coordinate estimated from map

When: Big Basin Member (John Day Formation), Chadronian (37.2 - 33.9 Ma)

• "Chadronian (late Eocene, Ch2 or later), above White Ash of Post dated 36.21 ± 0.26 Ma" "dark red claystone units stratigraphically higher than the White Ash of Post"

Environment/lithology: terrestrial; claystone

Size class: macrofossils

Primary reference: J. X. Samuels and W. W. Korth. 2017. The first Eocene rodents from the Pacific Northwest, USA. Palaeontologia Electronica 20.2.24A:1-17 [P. Holroyd/P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185945: authorized by Patricia Holroyd, entered by Patricia Holroyd on 27.05.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia - Ischyromyidae
Proischyromys perditus n. gen. n. sp.
Proischyromys perditus n. gen. n. sp. Samuels and Korth 2017 rodent