Ptychotrygonidae is an extinct family of cartilaginous fish from the Cretaceous period belonging to the suborder Sclerorhynchoidei. This family contains the genera Archingeayia, Asflapristis, Ptychotrygon, Ptychotrygonoides, and Texatrygon.[2]

References

  1. ^ Kriwet, J.; Nunn, E.V.; Klug, S. (2009). "Neoselachians (Chondrichthyes, Elasmobranchii) from the Lower and lower Upper Cretaceous of north-eastern Spain". Zoological Journal of the Linnean Society. 155 (2): 316–347. doi:10.1111/j.1096-3642.2008.00439.x.
  2. ^ 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. 42 (2): e2162411. doi:10.1080/02724634.2022.2162411. PMC 7614936. PMID 37564697.


Allikas: http://en.wikipedia.org/wiki/Ptychotrygonidae
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