Where: Switzerland (45.9° N, 9.0° E: paleocoordinates 7.0° N, 21.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nevadites secedensis ammonoid zone, Grenzbitumenzone Member (Besano Formation), Illyrian (247.2 - 242.0 Ma)

• Laminated bituminous dolostone in a gallery of the former mine; correlating to bed 73

• bed-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified dolomite and lithified, black shale

Size class: macrofossils

Preservation: adpression

Collection methods: quarrying,

• Repository: Palaontologisches Institut und Museum der Universitat Zurich (PIMUZ)

Primary reference: V. Pieroni. 2022. Middle Triassic Nautilida from the Besano Formation of Monte San Giorgio, Switzerland. Swiss Journal of Palaeontology 141(21):1-12 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 231809: authorized by Matthew Clapham, entered by Matthew Clapham on 12.09.2023

Creative Commons license: CC BY (attribution)