Where: Jack County, Texas (33.3° N, 98.1° W: paleocoordinates 5.7° S, 32.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jacksboro Limestone Member (Graham Formation), Gzhelian (303.7 - 298.9 Ma)

• Jacksboro Limestone Member of the Graham Formation. The Jacksboro Limestone directly overlies the Finis Shale, so it is early Virgilian (early Gzhelian) in age.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Reposited in the USNM

Primary reference: W. M. Itano and S. G. Lucas. 2018. A revision of Campyloprion Eastman, 1902 (Chondrichthyes, Helicoprionidae), including new occurrences from the Upper Pennsylvanian of New Mexico and Texas, USA. Acta Geologica Polonica 68:403-419 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196773: authorized by Matthew Clapham, entered by Matthew Clapham on 06.10.2018

Creative Commons license: CC BY (attribution)