Ptychotrygon

Ptychotrygon Temporal range: Albian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Ptychotrygon sp. oral teeth from the Cretaceous of Texas, USA
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	Rajiformes
Suborder:	† Sclerorhynchoidei
Family:	† Ptychotrygonidae
Genus:	† Ptychotrygon Jaekel, 1894
Species
See text.

Ptychotrygon is a genus of sawfish-like ray whose fossils have been found worldwide from the Cretaceous period (Albian-Maastrichtian). ^[1] Along with Ptychotrygonoides , Texatrygon , and Asflapristis , it is the member of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. ^{[2] [3]}

Species

The following species are considered valid: ^{[4] [2]}

• †Ptychotrygon ameghinorum
• †Ptychotrygon blainensis
• †Ptychotrygon eutawensis
• †Ptychotrygon geyeri
• †Ptychotrygon mcnultyi
• †Ptychotrygon nazeensis
• †Ptychotrygon pustulata
• †Ptychotrygon rostrispatula
• †Ptychotrygon striata
• †Ptychotrygon triangularis
• †Ptychotrygon vermiculata

References

1. Begat, A.; Kriwet, J.; Gelfo, J.N.; Cavalli, S.G.; Schultz, J.A.; Martin, T. (2023). "The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy". Journal of Vertebrate Paleontology e2162411. doi: 10.1080/02724634.2022.2162411 . PMC   7614936 .
2. Villalobos‐Segura, Eduardo; Underwood, Charlie J.; Ward, David J. (2021). "The first skeletal record of the enigmatic Cretaceous sawfish genus Ptychotrygon (Chondrichthyes, Batoidea) from the Turonian of Morocco" . Papers in Palaeontology. 7: 353–376. doi:10.1002/spp2.1287. ISSN   2056-2802. S2CID   210302939.
3. Villalobos-Segura, Eduardo; Underwood, Charlie J.; Ward, David J.; Claeson, Kerin M. (2019-11-02). "The first three-dimensional fossils of Cretaceous sclerorhynchid sawfish: Asflapristis cristadentis gen. et sp. nov., and implications for the phylogenetic relations of the Sclerorhynchoidei (Chondrichthyes)". Journal of Systematic Palaeontology. 17 (21): 1847–1870. doi:10.1080/14772019.2019.1578832. ISSN   1477-2019. S2CID   145940997.
4. "Fossilworks: Ptychotrygon". fossilworks.org. Retrieved 17 December 2021.