Translator Disclaimer
16 July 2020 A New Addition to the Devonian Elasmobranch Fauna of Michigan, U.S.A.
Author Affiliations +
Abstract

A tooth of Phoebodus cf. P. sophiae (Chondrichthyes, Elasmobranchii) was recovered from the Middle Devonian, Early Givetian, Rockport Quarry Limestone Formation in Alpena, Michigan. It is the first known record of the taxon in Michigan and the third known locality from North America. It is the oldest known record in North America, and possibly worldwide, and may extend the known temporal range of the genus. Previous known records for P. sophiae have been confined to the middle Givetian Polygnathus varcus conodont zone, and the taxon was thought to be a possible index fossil for the middle Givetian. The present record extends the taxon to the early Givetian P. hemiansatus conodont zone and, thus, complicates the use of P. sophiae as a proxy index fossil for the P. varcus zone.

Anthony L. Swinehart, Matthew M. J. Hoenig, and Michal Ginter "A New Addition to the Devonian Elasmobranch Fauna of Michigan, U.S.A.," The American Midland Naturalist 184(1), 109-115, (16 July 2020). https://doi.org/10.1637/0003-0031-184.1.109
Published: 16 July 2020
JOURNAL ARTICLE
7 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top