Where: Stanislaus County, California (36.1° N, 120.5° W: paleocoordinates 35.8° N, 81.1° W)

• coordinate stated in text

When: Waltham Formation, Cenomanian (100.5 - 93.9 Ma)

• Str. position: Lower Wartham (sic) shale [should be Waltham Shale]

•Age: Cenomanian

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by S. W. Muller in 1941; reposited in the CAS

Primary reference: T. Matsumoto. 1960. Upper Cretaceous ammonites of California. Part III. Memoirs of the Faculty of Science, Kyushu University Series D, Geology, Special Volume II 1-204 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 224962: authorized by Jonathan Marcot, entered by Jonathan Marcot on 14.04.2022

Creative Commons license: CC BY (attribution)