Where: Saratov, Russian Federation (52.5° N, 46.6° E: paleocoordinates 49.2° N, 40.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kalinino Formation, Ypresian (56.0 - 47.8 Ma)

• Top of the sandy member of the Kalinino Formation. Lower Ypresian (NP 10-11). Modern dating of the formation by spore-pollen complexes, dinoflagellates and dinocysts dates it as early Ypresian (NP 10-11). The highest occurrence of Otodus obliquus takes place within zone NP12. Therefore, the presence of Otodus obliquus in the Kalinino Formation indicated the early Ypresian age of the assemblage (its stratigraphic position is not higher than NP12 nannoplankton zone).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified, fine-grained, medium, quartzose sandstone

Size class: macrofossils

Collection methods: surface (in situ)

• Repository: Saratov State University, Saratov, Russia (SSU)

Primary reference: E. V. Popov and V. A. Lopyrev. 2024. Elasmobranchs from the Lower Eocene Kalinino Formation of the Alai River, Saratov Region of Russia. Historical Biology 36:783-795more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 235736: authorized by Matthew Clapham, entered by Matthew Clapham on 27.07.2024

Creative Commons license: CC BY (attribution)