Where: Aargau, Switzerland (47.5° N, 8.2° E: paleocoordinates 36.5° N, 11.2° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Liasicus (201.3 - 196.5 Ma)

• "Beds with Psiloceras planorbis and Schlotheimia angulata" according to Van Straelen. Oppel says that the specimen occurs with "Ammonites" longipontinus (Psiloceras longipontinum) and proposed the Longipontinus zone, where it co-occurs with Alsatites laqueus, between Planorbis and Angulata zones. Likely from Laqueus subzone.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

Size class: macrofossils

Collected by Heer, Escher

• Repository: Paläontolog. Sammlung in Zürich (possibly ETH now)

Primary reference: V. Van Straelen. 1925. Contribution a l'étude des crustacés décapodes de la période Jurassique. Mémoires d’Académie Royale de Belgique 7:1-462 [C. Schweitzer/E. Johnson/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44629: authorized by David Bottjer, entered by Matthew Clapham on 15.09.2004

Creative Commons license: CC BY (attribution)