Where: Texas (33.8° N, 99.1° W: paleocoordinates 0.6° N, 30.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Grape Creek Member (Clyde Formation), Artinskian (290.1 - 279.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified siliciclastic sediments

Size class: macrofossils

Reposited in the YPM

Primary reference: F. B. Plummer and G. Scott. 1937. Upper Paleozoic ammonites in Texas. The University of Texas Bulletin 3701:1-516 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 131556: authorized by Matthew Clapham, entered by Matthew Clapham on 26.07.2012

Creative Commons license: CC BY (attribution)