Ptychodus ex. gr. decurrens

Agassiz, 1838


Classification: Elasmobranchii incert. sedis Ptychodontidae

Reference of the original description
Agassiz, L. (1838)
Recherches sur les poissons fossiles, 11th livraison (November 1838). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: [73]-140, pl. 1a, 8a, 8b, 15, 17, 19, 20, 24, 25b, 30, 31, 32, 33, 34, 35, 39, 40.

Types
Ptychodus ex. gr. decurrens



Description:


Citation: Ptychodus ex. gr. decurrens Agassiz, 1838: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2024

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Remarks
shark-references Species-ID=10849;
synonym of Ptychodus mammillaris after Woodward (1889) p.133 [2593] Agassiz [27814] Vol. III, p 154, pl. 25b, figs. 3, 5; valid after WILLIAMSON et al. (1991) [4309]; VERMA et al. (2012) [14419];

References
Underwood, C.J. & Cumbaa, S.L. (2010)
Chondrichthyans from a Cenomanian (Late Cretaceous) bonebed, Saskatchewan, Canada. Palaeontology, 53(4), 903–944
DOI: 10.1111/j.1475-4983.2010.00969.x