Where: Texas (30.4° N, 103.3° W: paleocoordinates 1.4° N, 33.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willis Ranch Member (Word Formation), Roadian (272.3 - 268.8 Ma)

• Third limestone member

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

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 113226: authorized by Matthew Clapham, entered by Matthew Clapham on 24.07.2011

Creative Commons license: CC BY (attribution)