Where: Sonora, Mexico (30.3° N, 111.5° W: paleocoordinates 15.2° N, 50.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Early/Lower Jurassic (201.4 - 174.7 Ma)

Environment/lithology: marine; fine-grained, black sandstone

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: collected by Dr. W. T. Keller (Basel)

Primary reference: E. Jaworski. 1929. Eine Lias-Fauna aus Nordwest-Mexiko. Abhandlungen der Schweizerischen Palaeontologischen Gesellschaft 48:1-12 [M. Aberhan/S. Nurnberg/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39133: authorized by Martin Aberhan, entered by Sabine Nürnberg on 20.05.2004

Creative Commons license: CC BY (attribution)