Where: Sonora, Mexico (29.4° N, 109.5° W: paleocoordinates 29.9° N, 64.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Agua Salada Formation, Late/Upper Aptian (122.5 - 113.0 Ma)

• Cherty limestone bed in lower black shales

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, cherty/siliceous limestone

Size class: macrofossils

Collected by C.M. Garcia-Leon

• Repository: Estacion Regional del Noroeste, Universidad Nacional Autonoma de Mexico (Hermosillo, Sonora, Mexico).

Primary reference: E. Robert, A. Samaniego-Pesqueira, J. A. Moreno-Bedmar and C. M. González-León. 2018. Aptian and Albian (Early Cretaceous) ammonites from Lampazos and the Bisbee groups (Sonora State, northwest Mexico). Cretaceous Research 86:1-23 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191939: authorized by Matthew Clapham, entered by Matthew Clapham on 24.02.2018

Creative Commons license: CC BY (attribution)