Where: Russian Federation (71.9° N, 127.1° E: paleocoordinates 61.5° N, 30.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Boguchan Formation, Wordian (266.9 - 264.3 Ma)

• Boguchany

•Originally entered as Roadian, but the Boguchan Formation is Wordian according to Biakov et al. (2012).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: K. A. Astaf'yeva-Urbaytis. 1981. The genus Exochorhynchus from the upper Paleozoic deposits in the USSR and Mongolia. Paleontological Journal 15:29-36 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87151: authorized by Matthew Clapham, entered by Matthew Clapham on 08.03.2009

Creative Commons license: CC BY (attribution)