Where: Russian Federation (72.8° N, 108.0° E: paleocoordinates 74.3° N, 87.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bidichotomus ammonoid zone, Late/Upper Valanginian (140.2 - 136.4 Ma)

• Bidichotomoides subzone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Bogomolov in 1984

Primary reference: Y. I. Bogomolov. 1989. Poliptikhity (Ammonity) i biostratigrafiya boreal'nogo Valanzhina. Akademiya Nauk SSSR, Sibirskoe Otdelenie Trudy Instituta Geologii I Geofiziki 696:1-199 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189646: authorized by Matthew Clapham, entered by Matthew Clapham on 04.11.2017

Creative Commons license: CC BY (attribution)