Where: Sonora, Mexico (30.8° N, 112.5° W: paleocoordinates 11.8° N, 40.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Antimonio Formation, Wordian to Wordian (266.9 - 259.5 Ma)

• Middle Permian, Guadalupian

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: macrofossils

Preservation: mold/impression

Primary reference: S. G. Lucas, B. S. Kues, J. W. Estep and C. M. González-León. 1997. Permian-Triassic boundary at El Antimonio, Sonora, Mexico. Revista Mexicana de Ciencias Geológicas 14(2):149-154 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 39201: authorized by Martin Aberhan, entered by Sabine Nürnberg on 23.05.2004

Creative Commons license: CC BY (attribution)