Where: Tenkinskii, Russian Federation (60.2° N, 150.5° E: paleocoordinates 65.5° N, 133.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ola Formation, Early/Lower Campanian (83.5 - 70.6 Ma)

• The Ola Suite is known to contain flora of the Arkagala assemblage and yields 40Ar/39Ar ages ranging from 83.7 ± 0.6 Ma to 80.7 ± 0.8 Ma. Previous research suggested that the Arkagala flora within the Ola Suite is early Cenomanian age. Here too, the Campanian stratigraphic age indicated by the 40Ar/39Ar geochronology documents systematic inaccuracy in the age designation of the Arkagala floral assemblage. Arkagala flora is also found in the Mygdykit basalt units, which range in age from 77.5 ± 1.1 Ma to 73.7 ± 0.7 Ma, suggesting that these taxa survived through at least the late Campanian.

Environment/lithology: lacustrine - small; lithified, tuffaceous mudstone

Size class: mesofossils

Preservation: mold/impression, adpression

Collected by V. V. Zherikhin in 1978; reposited in the PIN

• In 1978 a large number of fossil insects was collected from Upper Cretaceous beds of Obeshchayushchy locality (Magadan Region, northern Russian Far East).

Primary reference: G. M. Dlussky. 1983. A new family of Upper Cretaceous Hymenoptera: An "Intermediate link" between the Ants and the Scolioids. Paleontological Journal 17(3):63-76 [M. Clapham/J. Karr/R. Day]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105375: authorized by Matthew Clapham, entered by Jered Karr on 19.02.2011, edited by Matthew Clapham and Lindy Edwards

Creative Commons license: CC BY (attribution)