Where: Alaska (57.3° N, 156.6° W: paleocoordinates 27.8° N, 88.2° W)

• coordinate based on nearby landmark

When: Kialagvik Formation, Middle Jurassic (174.7 - 161.5 Ma)

• Hammatoceras beds of Kialagvik Formation

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

Collected by S.R. Capps in 1921

Primary reference: T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139490: authorized by George Stanley, entered by Hannah Shepherd on 12.02.2013

Creative Commons license: CC BY (attribution)