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Baltic amber, De Walsche collection (Eocene of Russian Federation)

Where: Kaliningrad, Russian Federation (54.9° N, 19.9° E: paleocoordinates 53.9° N, 15.2° E)

• coordinate based on nearby landmark

When: Priabonian (37.2 - 33.9 Ma)

• According to Aleksandrova and Zaporozhets (2008), the higher parts of the Prussian Formation (including the Blaue Erde or Blue Earth) belong to the Charlesdowniea clathrata angulosa dinocyst Zone. Based on its index species, this zone is concurrent to Zone W13 established in the Parisian basin (Châteauneuf and Gruas-Cavagnetto 1978), where it is correlated with nannoplankton zones NP18–NP21 (Powell, 1992) of the Priabonian. In the Paleogene zonation of northwestern Europe, the first occurrence of Thalassiphora fenestrata is designated at the base of the dinocyst Subzone D12b (36.20 +/- 0.1 Ma), which is correlated with zones NP18 (terminal part)–NP20 of the Priabonian (Luterbacher et al., 2004).

Environment/lithology: terrestrial; amber

Size classes: macrofossils, mesofossils

Preservation: amber

Collection methods: Material in private collection of Jules De Walsche, Brussels

Primary reference: G. Demoulin. 1956. Electrogenia dewalschei n. gen. n. sp., Ephemeroptere fossile de l'ambre. Bulletin & Annales de la Societe Royale d'Entomologie de Belgique 92(III-IV):95-100 [C. Labandeira/A. Spencer-Lee/R. Day] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 124529: authorized by Matthew Clapham, entered by Matthew Clapham on 17.02.2012

Creative Commons license: CC BY (attribution)