UCMP A3706 (Oligocene of the United States)

Where: Snohomish County, Washington (47.1° N, 122.0° W: paleocoordinates 46.8° N, 113.1° W)

• coordinate based on nearby landmark

When: Blakeley Formation, Chattian (28.1 - 23.0 Ma)

Environment/lithology: marine; sandstone

Size class: macrofossils

Primary reference: J. W. Durham. 1944. Megafaunal zones of the Oligocene of northwestern Washington. University of California Publications in Geological Sciences 27:101 -212 [P. Holroyd/E. Orzechowski]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 208174: authorized by Mark Uhen, entered by Mark Uhen on 22.03.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Neotaenioglossa - Calyptraeidae
Calyptraea sookensis
Calyptraea sookensis Clark and Arnold 1923 slipper shell
 Cerithioidea - Pleuroceridae
Goniobasis sp.
Goniobasis sp. Lea snail
Bivalvia
 Cardiida - Corbiculidae
Corbicula sookensis
Corbicula sookensis Clark and Arnold 1923 clam
 Cardiida - Mactridae
"Mactra hannibali" = Mactromeris hannibali
"Mactra hannibali" = Mactromeris hannibali Clark and Arnold 1923 clam
 Cardiida - Veneridae
? Pitar arnoldi
? Pitar arnoldi venus clam
subspecies etheringtoni
 Mytilida - Mytilidae
Mytilus stillaguamishensis n. sp.
Mytilus stillaguamishensis n. sp. Weaver 1912 mussel