New ancient shark discovered

Teeth of the new hybodontiform shark Durnonovariaodus maiseyi from the Upper Jur
Teeth of the new hybodontiform shark Durnonovariaodus maiseyi from the Upper Jurassic Kimmeridge Clay Formation of England (© Sebastian Stumpf)
Teeth of the new hybodontiform shark Durnonovariaodus maiseyi from the Upper Jurassic Kimmeridge Clay Formation of England (© Sebastian Stumpf) - In a new study, an international team led by Sebastian Stumpf from the University of Vienna describes a fossil skeleton of an ancient shark, which is assigned to a new, previously unknown genus and species. This rare fossil find comes from the Kimmeridge Clay Formation in England, a series of sedimentary rocks that was formed in a shallow, tropical-subtropical sea during the Upper Jurassic, about 150 million years ago. The fossil shark skeleton was found more than 20 years ago on the southern coast of England and is now held in the Etches Collection. Additional fossil shark specimens from it will be investigated in the years to come. Due to their life-long tooth replacement shark teeth are among the most common vertebrate finds encountered in the fossil record. The low preservation potential of their poorly mineralized cartilaginous skeletons, on the other hand, prevents fossilization of completely preserved specimens in most cases. The new study published in the journal "PeerJ" and led by Sebastian Stumpf from the University of Vienna now presents the fossil skeleton of a new ancient shark from the Kimmeridge Clay Formation of England, a fossiliferous rock sequence that was formed during the Late Jurassic in a shallow, tropical-subtropical sea.
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