Kem' River, Western Siberia (Cretaceous of Russian Federation)

Where: Siberia, Russian Federation (56.0° N, 39.0° E: paleocoordinates 47.4° N, 32.6° E)

• coordinate based on political unit

When: Kemskaya Formation, Cenomanian (100.5 - 93.9 Ma)

• The Kemskaya Formation is overlain by the Tertiary deposits of the Varakovskaya Formation consisting of ferruginous sandstones and conglomerates.


• The Kemskaya Formation here consists of the soft white to light gray caolinitic sands and clays that are overlain by the Varakovskaya Formation.

Size class: microfossils

Preservation: adpression, original sporopollenin

Collection methods: surface (in situ),

Primary reference: V. A. Krassilov and L.B. Golovneva. 2000. A new order of heterosporous plants from the Late Cretaceous of the Kem' River, Western Siberia. Paleontological Journal 34(1):89-97 [R. Lupia/B. Wilborn/B. Wilborn]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34170: authorized by Rick Lupia, entered by Brooke Wilborn on 20.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Heroleandra profusa n. gen. n. sp.
Heroleandra profusa n. gen. n. sp.