Baltic Amber (Sommerfeldt collection) (Eocene of Russian Federation)

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

When: Priabonian (38.0 - 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, microfossils

Preservation: amber

Collection methods: Repository: Duisburg

Primary reference: G. L. Mayr. 1868. Die Ameisen des baltischen Bernsteins. Beiträge zur Naturkunde Preussens 1:1-102 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138663: authorized by Matthew Clapham, entered by Matthew Clapham on 24.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hymenoptera - Formicidae
Lasius schiefferdeckeri Mayr 1868 ant
No. 19, 20
Prenolepis henschei Mayr 1868 ant
Formica flori Mayr 1868 ant
No. 10,21,22,23,24
Gesomyrmex hoernesi Mayr 1868 ant
No. 25
"Hypoclinea baltica" = Dolichoderus balticus Mayr 1868 ant
No. 40
"Hypoclinea geinitzi" = Yantaromyrmex geinitzi Mayr 1868 ant
No. 5,13,18,34,35-39
"Hypoclinea goepperti" = Ctenobethylus goepperti Mayr 1868 ant
No. 3,4,7,9,11,14-16,26-34
Aphaenogaster sommerfeldti Mayr 1868 ant
No. 6
"Macromischa rudis" = Myrmica rudis Mayr 1868 ant
No. 41