USGS 4135 (Oligocene to of the United States)

Where: Clallam County, Washington (48.4° N, 124.6° W: paleocoordinates 48.2° N, 118.0° W)

When: Oligocene to Oligocene (33.9 - 5.3 Ma)

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

• One male and impression; also a finger which may belong to the same species.

Preservation: mold/impression

Collected by Ralph Arnold, USGS in 1904; reposited in the USNM

• Cat. No. 353327

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 139019: authorized by Carrie Schweitzer, entered by Samantha Yost on 07.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Mathildellidae
Branchioplax washingtoniana Rathbun 1916 crab