Where: Coahuila, Mexico (26.3° N, 102.9° W: paleocoordinates 2.3° S, 35.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Palo Quemado Formation, Roadian (272.3 - 268.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Norman Newell

Primary reference: R. E. King. 1944. Geology, Part I of Geology and paleontology of the Permian area northwest of Las Delicias, southwestern Coahulia, Mexico. Geological Society of America Special Paper 52:3-33 [T. Olszewski/L. Fall/L. Fall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133175: authorized by Matthew Clapham, entered by Matthew Clapham on 04.09.2012

Creative Commons license: CC BY (attribution)