Where: Texas (30.4° N, 103.3° W: paleocoordinates 1.1° N, 33.4° W)

• coordinate estimated from map

When: Kungurian (279.3 - 272.3 Ma)

• ?Cathedral Mountain or ?Road Canyon Formation

Environment/lithology: lithified limestone

Size class: macrofossils

Preservation: original silica

Reposited in the TMM

Primary reference: C. R. Ossian. 1976. Redescription of Megactenopetalus kaibabanus David 1944 (Chondrichthyes: Petalodontidae) with Comments on Its Geographic and Stratigraphic Distribution. Journal of Paleontology 50(3):392-397 [M. Clapham/T. Wolfe]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 118958: authorized by Matthew Clapham, entered by Trisha Wolfe on 19.10.2011

Creative Commons license: CC BY (attribution)