Where: Bashkortostan, Russian Federation (53.6° N, 56.1° E: paleocoordinates 22.1° N, 42.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Shakhtau Reef Formation, Asselian (298.9 - 295.5 Ma)

• The preliminary estimate of the geological age based on geological exploration profiles is Late Asselian, although the beds may be around the Asselian-Sakmarian boundary.

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

Size class: macrofossils

Preservation: mold/impression

Reposited in the PIN

• PIN collections 5538 (gastropods) and 5668 (cephalopods)

Primary reference: A. V. Mazaev. 2019. Lower Permian gastropods of Shakhtau (Asselian–Sakmarian boundary beds, southern Cisuralia). Paleontological Journal 53:1237-1345 [P. Wagner/P. Wagner/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 220884: authorized by Matthew Clapham, entered by Matthew Clapham on 23.06.2021

Creative Commons license: CC BY (attribution)