Where: Russian Federation (69.7° N, 84.5° E: paleocoordinates 51.9° N, 34.5° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Changhsingian (254.2 - 252.2 Ma)

• 1200-1800 m depth, uppermost Permian. Contains remains of conchostracans, indicating the Lower Triassic according to M.E. Lyutkevich and the Upper Permian according to N.I. Novozhilov, the remains of Permian flora (according to E.N. Kara-Murza), insects from the Lower Triassic (EE Bekker-Mirdisova), indefinable bivalves, no spores and no pollen. Birshtein previously assigned this stratum to the Permo-Triassic, but now is more inclined to consider it Upper Permian.

• group of beds-level stratigraphic resolution

Environment/lithology: deltaic; lithified, tuffaceous mudstone

Size class: macrofossils

Preservation: adpression

Primary reference: Y. A. Birshtein. 1958. Drevneyshiy predstavitel otryada desyatinogikh rakoobraznikh Protoclytiopsis antiqua gen. nov. sp. nov. iz Permsikikh otlozheniy zapadnoy Sibiri. Doklady Akademii Nauk SSSR 122:477-480 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117459: authorized by Matthew Clapham, entered by Matthew Clapham on 21.09.2011

Creative Commons license: CC BY (attribution)