Where: Malheur County, Oregon (44.4° N, 117.7° W: paleocoordinates 44.8° N, 116.1° W)

When: Late/Upper Miocene to Late/Upper Miocene (11.6 - 3.6 Ma)

• "Dr. John P. Buwalda writes, after a study of mammalian remains in Oregon: 'I think it probable that if the rock in which the crayfish were entomed is fairly well indurated, the age can, with quite a high degree of probability, be assigned to upper Miocene and lower Pliocene.'" - as quoted from reference

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

• upwards of 1,000 fragmentary specimens representing at least 200 individuals: including portion of carapace, right minor chela, left immovable finger, ambulatory legs, right major cheliped, abdomen and tail fan, rostral end, merus of cheliped, and anterior part of carapace with rostrum (P. chenoderma);

Collected by Charles W. McDowell

• P. chenoderma specimens in Yale Museum;

Primary reference: M. J. Rathbun. 1926. The Fossil Stalk-Eyed Crustacea of the Pacific Slope of North America. United States National Museum Bulletin 138:1-155 [C. Schweitzer/S. Yost/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 140561: authorized by Carrie Schweitzer, entered by Samantha Yost on 12.03.2013

Creative Commons license: CC BY (attribution)