Near Eugene (Oligocene of the United States)

Where: Oregon (44.1° N, 123.1° W: paleocoordinates 43.7° N, 114.1° W)

When: Late/Upper Oligocene (28.4 - 23.0 Ma)

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

• One specimen and impression (M. alaskensis); two small carapaces lacking spines may be young of R. washburnei; "a fragment of a larger carapace is also doubtfully referred to this species." (R. washburnei); one carapace, holotype, and impression and portions of two other carapaces, one of which may be considered a paratype (R. eugenensis); three specimens and two impressions of carapace, also fragments of sternum and appendages. "The largest carapace is finely granulate and dull all over, but does not retain the true outer surface which is shining and partly smooth", (R. fulgidus); three specimens: an incomplete right chela (inner surface), distal end of left manus with fingers, and left cheliped lacking fingers, [C. oregonensis];

Preservation: mold/impression, concretion

Collection methods: University of Oregon (No. 80); holotype in University of Oregon (R. eugenensis);

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 139890: authorized by Carrie Schweitzer, entered by Samantha Yost on 20.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Decapoda - Palaeocorystidae
Raninoides fulgidus Rathbun 1926 crab
Raninoides eugenensis Rathbun 1926 crab
Raninoides washburnei Rathbun 1926 crab
 Decapoda - Portunidae
Megokkos alaskensis Rathbun 1926 swimming crab
 Decapoda - Callianassidae
Callianassa oregonensis Dana 1849 decapod