Where: Oaxaca, Mexico (17.5° N, 97.1° W: paleocoordinates 15.2° S, 49.9° W)

• coordinate stated in text

When: Ixtaltepec Formation, Pennsylvanian (323.2 - 298.9 Ma)

• bivalves allow a tentative age assignment that ranges from Morrowan to Desmoinesian

Environment/lithology: offshore; gray shale

Size class: macrofossils

• bryozoans, brachiopods, bivalves, trilobites, crinoids

•(in general - argilliceous unit: bivalve species are associated with delicate branched or laminar bryozoan colonies, trilobites, crinoids, corals, ophiuroids, gastropods, and spiriferid, strophomenid, and inarticulate brachiopods)

Preservation: mold/impression

Primary reference: S.A. Quiroz-Barroso and M. del Carmen Perrilliat. 1998. Pennsylvanian Bivalves from the Ixtaltepec Formation, Mexico. Journal of Paleontology 72(6):1011-1024 [B. Seuss/B. Seuss]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 211814: authorized by Barbara Seuss, entered by Barbara Seuss on 28.07.2020

Creative Commons license: CC BY (attribution)