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1 December 2009 Pseudodalatias henarejensis nov. sp. A New Pseudodalatiid (Elasmobranchii) from the Middle Triassic of Spain
Héctor Botella, Pablo Plasencia, Ana Marquez-Aliaga, Gilles Cuny, Markus Dorka
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Abstract

Pseudodalatiids, a chondrichthyan family of uncertain phylogenetic affinities, have been hitherto exclusively known from the tooth-based species Pseudodalatias barnstonensis (Sykes, 1971), which has a stratigraphic range restricted to the Upper Triassic of Europe. Pseudodalatias presents a characteristic dentition which allows it to hold and cut its prey, showing a neoselachian design, but lacking the triple-layered enameloid microstructure of neoselachian teeth. The discovery of Pseudodalatias henarejensis nov. sp. in the Ladinian of Spain extends the stratigraphical range and the palaeogeographical distribution of this family. This new species also demonstrates that a cutting-clutching dentition evolved progressively in the family Pseudodalatidiidae. Pseudodalatiids are likely to represent stem-batoids or stemneoselachians rather than aberrant hybodonts.

© 2009 by the Society of Vertebrate Paleontology
Héctor Botella, Pablo Plasencia, Ana Marquez-Aliaga, Gilles Cuny, and Markus Dorka "Pseudodalatias henarejensis nov. sp. A New Pseudodalatiid (Elasmobranchii) from the Middle Triassic of Spain," Journal of Vertebrate Paleontology 29(4), 1006-1012, (1 December 2009). https://doi.org/10.1671/039.029.0425
Received: 8 January 2009; Accepted: 1 March 2009; Published: 1 December 2009
JOURNAL ARTICLE
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