A Description of the New Hybodont Shark Genus, Columnaodus, from the Burlington and Keokuk Limestones (Carboniferous, Mississippian, Osagean) of Illinois and Iowa, USA
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Published:2024-05-06
Issue:5
Volume:16
Page:276
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ISSN:1424-2818
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Container-title:Diversity
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language:en
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Short-container-title:Diversity
Author:
Cicimurri David1, Ciampaglio Charles2, Hoenig Matthew2, Shell Ryan3, Fuelling Lauren2, Peterman David4, Cline Daniel A.2, Jacquemin Stephen2
Affiliation:
1. South Carolina State Museum, 301 Gervais Street, Columbia, SC 29201, USA 2. Science, Mathematics, and Engineering Academic Unit, Wright State University Lake Campus, Celina, OH 45822, USA 3. Department of Vertebrate Paleontology, Cincinnati Museum Center, Cincinnati, OH 45203, USA 4. Department of Mechanical Engineering, Penn State, University Park, PA 16801, USA
Abstract
Bonebeds occurring in exposures of the Burlington and Keokuk Limestones (Mississippian/Osagean) along the Iowa and Illinois border (USA) contain an abundant and diverse collection of chondrichthyan remains that includes teeth, spines, denticles, and coprolites. These remains represent cochliodont, hybodont, petalodont, ctenacanthid, symmoriid, and acanthodian (stem chondrichthyan) taxa. The thickest of these beds, herein referred to as the Burlington–Keokuk bonebed, occurs at the top of the Burlington Limestone and presents a remarkable opportunity to study the assemblage of mid-continent, Middle Mississippian chondrichthyans. Bulk matrix samples of this bonebed were collected from two quarries (Biggsville Quarry, Biggsville, IL, USA, and Nelson Quarry, Mediapolis, IA, USA) and disaggregated. Among the multitude of previously known taxa, several teeth represented a new genus and species of hybodont shark. Herein, we describe these teeth as Columnaodus witzkei (gen. et sp. nov.), a hybodontiform with dental features comparable to unnamed specimens reported from elsewhere.
Reference70 articles.
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