Where: Russian Federation (60.8° N, 145.7° E: paleocoordinates 85.9° N, 86.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sirenites yakutensis ammonoid zone, Tuvalian (232.0 - 221.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Collection methods: Repository: Central Geological and Prospecting Museum, St. Petersburg (TsNIGR)

Primary reference: E. S. Sobolev. 1989. Triasovye nautilidy severo-vostochnoy Azii. Akademiya Nauk SSSR, Sibirskoe Otdelenie Trudy Instituta Geologii I Geofiziki 727:1-193 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 166686: authorized by Matthew Clapham, entered by Matthew Clapham on 22.02.2015

Creative Commons license: CC BY (attribution)