Where: Texas (33.1° N, 98.6° W: paleocoordinates 5.7° S, 32.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Graham Formation (Cisco Group), Gzhelian (303.7 - 298.9 Ma)

• Below the Avis conglomerate

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by A.B. Gant; reposited in the USNM

• Material described by Smith, 1903

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 128643: authorized by Matthew Clapham, entered by Matthew Clapham on 14.06.2012

Creative Commons license: CC BY (attribution)