Shaly sandstone bluffs on Chehalis River below Porter (Oligocene of the United States)

Where: Washington (46.9° N, 123.3° W: paleocoordinates 46.5° N, 113.6° W)

When: Oligocene (33.9 - 23.0 Ma)

Environment/lithology: marine; sandstone and shale

• "Shaly sandstone bluff on Chehalis River"

Size classes: macrofossils, mesofossils

• 3 specimens (M. triangulum); {three specimens of the left manus, two having the propodal finger attached but lacking the tip. The specimen without finger (paratype a) is separate from the matrix and shows inner and outer surfaces, the others show only the outer surface. The larger of these is considered the holotype, the smaller appears to be a minor chela (paratype b)}, [N. porterensis];

Collection methods: 2 specimens (P. vulgaris), Stanford University (N. Pac. 53); holotype in Stanford University (N. porterensis);

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 139447: authorized by Carrie Schweitzer, entered by Samantha Yost on 12.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Callianassidae
Neocallichirus porterensis Rathbun 1926 decapod
 Decapoda - Xanthidae
Pilodius vulgaris Glaessner 1928 stone crab
 Decapoda - Macropipidae
Maeandricampus triangulum Rathbun 1926 crab