Swiss Journal of Palaeontology

, Volume 132, Issue 1, pp 69–75 | Cite as

The first tooth set of Ptychodus atcoensis (Elasmobranchii: Ptychodontidae), from the Cretaceous of Venezuela



Ptychodus atcoensis is a characteristic Late Cretaceous durophagous shark, with a fossil record that was previously known exclusively from the Coniacian Atco Formation in Texas, USA, North America. We illustrate and describe for the first time a partial articulated tooth set of P. atcoensis, from the Cretaceous of the Venezuelan Andes, representing the only known record of this species outside of North America, thus significantly increasing the palaeobiogeographic distribution of this taxon. This partial tooth set also documents characteristic variation in the teeth of P. atcoensis that will allow isolated teeth of the species to be more readily identified and located in the dentition.


Cretaceous Venezuela Elasmobranchii Ptychodontidae Ptychodus 



The authors wish to thank Dr. Bruce Welton for information and Dr. Guillaume Guinot for his important collaboration; Dr. Lino Meneses and Mr. Heriberto Monsalve of the Gonzalo Rincón Gutiérrez Museum, Universidad de Los Andes, Merida, Venezuela, for their valuable assistance and approval of the revision of the fossil material. Comments on an earlier version of the manuscript by the reviewers improved its content and clarity.


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Copyright information

© Akademie der Naturwissenschaften Schweiz (SCNAT) 2013

Authors and Affiliations

  • Jorge D. Carrillo-Briceño
    • 1
  • Spencer G. Lucas
    • 2
  1. 1.Paleontological Institute and MuseumUniversity of ZurichZurichSwitzerland
  2. 2.New Mexico Museum of Natural HistoryAlbuquerqueUSA

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