Where: Russian Federation (61.9° N, 156.1° E: paleocoordinates 73.7° N, 169.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Opalinum (175.6 - 171.6 Ma)

• Beds with Retroceramus priscus

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression

Collected by E.V. Koschelkina in 1978

• Repository: Museum of the Northeast Interdisciplinary Scientific Research Institute of the Far East Branch of the Russian Academy of Sciences, Magadan (SVKNII)

Primary reference: E. V. Koschelkina. 1985. Nekotorye dvustvorchatye mollyuski iz Aalenskikh otlozheniy basseyna R. Viligi. Dvustvorchatye i Golovonogie Mollyuski Mezozoya Severo-Vostoka SSSR 57-74 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137346: authorized by Matthew Clapham, entered by Matthew Clapham on 14.12.2012

Creative Commons license: CC BY (attribution)