about 4 miles east of Hennepin (Ordovician of the United States)

Where: Oklahoma (34.5° N, 97.8° W: paleocoordinates 20.9° S, 82.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Didymograptus protobifidus graptolite zone, Upper Member (West Spring Creek Formation), Cassinian (478.6 - 468.1 Ma)

• Zone J-K. Overlies Kindblade formation. Underlies Joins formation.

• member-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Reposited in the USNM

Primary reference: E. O. Ulrich and G. A. Cooper. 1936. New Genera and Species of Ozarkian and Canadian Brachiopods. Journal of Paleontology 10(7):616-631 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188455: authorized by Pete Wagner, entered by Pete Wagner on 01.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Billingsellida - Tritoechiidae
Pomatotrema transversum n. sp. Ulrich and Cooper 1938
Pomatotrema oklahomense n. sp. Ulrich and Cooper 1936