About 1/2 mi E of mouth of East Twin River (Oligocene of the United States)

Where: Clallam County, Washington (48.2° N, 123.9° W: paleocoordinates 47.8° N, 114.2° W)

When: Oligocene (33.9 - 23.0 Ma)

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

• One specimen of left cheliped, showing portions of ischium, merus, carpus and proximal half of manus and an impression of the same (paratype e), [C. twinensis];

Preservation: mold/impression

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

• Station 80, register No. 4091; Paratype e, Cat. No. 353334 [C. twinensis];

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

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 140249: authorized by Carrie Schweitzer, entered by Samantha Yost on 06.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Callianassidae
Callianassa twinensis Rathbun 1926 decapod