Asflapristis Explained

Asflapristis is an extinct genus of ptychotrygonid sclerorhynchoid that lived during the Late Cretaceous. It contains two valid species: A. cristadentis from the Akrabou Formation of Morocco and A. rugosa from the Eutaw Formation of Georgia and Mississippi[1] and the Pleasant Creek Formation of North Carolina.[2] Articulated skeletons of A. cristadentis show it had secondarily lost the rostral denticles typical of sclerorhynchoids, a process called "depristification".[3]

Notes and References

  1. Cicimurri . D.J. . Ciampaglio . C.N. . Runyon . K.E. . 2014 . Late Cretaceous elasmobranchs from the Eutaw Formation at Luxapalila Creek, Lowndes County, Mississippi . PalArch's Journal of Vertebrate Palaeontology . 11 . 2 . 1–36 .
  2. Cicimurri . D.J. . Weems . R.E. . 2021 . First record of Ptychotrygon rugosum (Case, Schwimmer, Borodin, and Leggett, 2001) (Batomorphii, Sclerorhynchiformes, Ptychotrygonidae) in the United States Atlantic Coastal Plain . Journal of Vertebrate Paleontology . 41 . 2 . e1933996 . 10.1080/02724634.2021.1933996.
  3. Greenfield . T. . 2024 . Pristification: Defining the convergent evolution of saws in sharks and rays (Chondrichthyes, Neoselachii) . Mesozoic . 1 . 2 . 121–124 . 10.11646/MESOZOIC.1.2.3.

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