Ptychodus polygyrus concentricus
Agassiz, 1839
Classification: Elasmobranchii incert. sedis Ptychodontidae
Reference of the original description
Recherches sur les poissons fossiles, 10th and 12th livraisons (April 1839). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: 141-156, pl. 9, 23, 25, 30a.
Recherches sur les poissons fossiles, 10th and 12th livraisons (April 1839). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: 141-156, pl. 9, 23, 25, 30a.
Types
Ptychodus polygyrus concentricus
Ptychodus polygyrus concentricus
Description:
Citation: Ptychodus polygyrus concentricus Agassiz, 1839: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
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Remarks
shark-references Species-ID=10767;
shark-references Species-ID=10767;
References
On the teeth of Ptychodus and their distribution in the English Chalk. Quarterly Journal of the Geological Society of London, 67, 263–277
DOI: 10.1144/GSL.JGS.1911.067.01-04.10
On the teeth of Ptychodus and their distribution in the English Chalk. Quarterly Journal of the Geological Society of London, 67, 263–277
DOI: 10.1144/GSL.JGS.1911.067.01-04.10
