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Obruchevodid petalodonts (Chondrichthyes, Petalodontiformes, Obruchevodidae) from the Middle Mississippian (Viséan) Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky U.S.A.

Published online by Cambridge University Press:  24 January 2025

John-Paul M. Hodnett Open the ORCID record for John-Paul M. Hodnett [Opens in a new window] ,
H. Chase Egli ,
Rickard Toomey ,
Rickard Olson ,
Kelli Tolleson ,
Richard Boldon ,
Justin S. Tweet  and
Vincent L. Santucci
John-Paul M. Hodnett*
Affiliation:
Archaeology Office, Natural and Historic Resource Division, Maryland-National Capitol Park and Planning Commission, Upper Marlboro, Maryland 28608, USA Paleontology Program, Geological Resource Division, National Park Service, Washington D.C. USA
H. Chase Egli
Affiliation:
Department of Geological Sciences, University of Alabama, Tuscaloosa, AL U.S.A 35487
Rickard Toomey
Affiliation:
Mammoth Cave National Park, National Park Service, KY USA 42259
Rickard Olson
Affiliation:
Mammoth Cave National Park, National Park Service, KY USA 42259
Kelli Tolleson
Affiliation:
Mammoth Cave National Park, National Park Service, KY USA 42259
Richard Boldon
Affiliation:
Mammoth Cave National Park, National Park Service, KY USA 42259
Justin S. Tweet
Affiliation:
Paleontology Program, Geological Resource Division, National Park Service, Washington D.C. USA
Vincent L. Santucci
Affiliation:
Paleontology Program, Geological Resource Division, National Park Service, Washington D.C. USA
*
Corresponding author: John-Paul M. Hodnett; Email: [email protected]
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Abstract

Obruchevodid petalodonts are rare small chondrichthyans known from nearly complete to partial skeletons from the Upper Mississippian (Serpukhovian) Bear Gulch Limestone of central Montana and isolated teeth from the Upper Mississippian Bangor Limestone of northern Alabama. New records of obruchevodid petalodonts are presented here from the Middle Mississippian (Viséan) Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky. Obruchevodids are here represented by multiple teeth of a new taxon, Clavusodens mcginnisi n. gen. n. sp., and a single tooth referred to ?Netsepoye sp. Clavusodens mcginnisi n. gen. n. sp. is characterized by teeth with pointed mesiodistal and lingual margins and more robust chisel-like cusps on the anterolateral and distolateral teeth. The suggestion that obruchevodid petalodonts evolved to inhabit complex reef-like environments and other nearshore habitats with a feeding ecology analogous to extant triggerfish is explored and discussed.

UUID: http://zoobank.org/0955c37a-c458-4a4d-89c4-01d6915adeca

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Journal of Paleontology , First View , pp. 1 - 11
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Copyright
Copyright © The Author(s), 2025. Published by Cambridge University Press on behalf of Paleontological Society

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Footnotes

Handling Editor: Kerin Claeson

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