Also known as Freisen-Grügelborn/Saarland

Where: Rhineland-Palatinate, Germany (49.5° N, 7.2° E: paleocoordinates 3.0° N, 18.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Meisenheim Formation, Asselian (298.9 - 295.5 Ma)

• Stratigraphically, this lake horizon is situated at the top of the Meisenheim Formation (= top of the Odernheim Subformation), which is part of the Glan Subgroup within the Rotliegend Group (= Lower Dyas Group). One important tuff marker horizon, the Pappelberg Tuff, which is slightly older than the Humberg lake sediments, has yielded a 206Pb/238U age of 297.0 ± 3.2 Ma.

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; lithified shale

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collection methods: Repository: Zentrumfür Biodokumentation des Saarlandes (ZfB); Urweltmuseum GEOSKOP, Burg Lichtenberg (Pfalz), Thallichtenberg (UGKU)

Primary reference: A. G. Kirejtshuk, M. Poschmann, J. Prokop, R. Garrouste, and A. Nel. 2014. Evolution of the elytral venation and structural adaptations in the oldest Palaeozoic beetles (Insecta: Coleoptera: Tshekardocoleidae). Journal of Systematic Palaeontology 12:575-600 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 156248: authorized by Matthew Clapham, entered by Matthew Clapham on 15.05.2014

Creative Commons license: CC BY (attribution)