The Hybodontiformes (Chondrichthyes: Elasmobranchii) from the Missão Velha Formation (?Lower Cretaceous) of the Araripe Basin, North-East Brazil

作者: Camila D. Cupello , David D. Bermúdez-Rochas , David M. Martill , Paulo M. Brito

DOI: 10.1016/J.CRPV.2011.09.005

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摘要: Abstract The ?Early Cretaceous (pre-Aptian) Missao Velha Formation of the Araripe Basin North-East Brazil yields remains referred to two hybodontiform shark taxa: hybodontid Planohybodus and lonchidiid Parvodus . Paleoenvironmental analysis this formation suggests freshwater or perhaps brackish deposition. specimens described here were collected from a new locality are found in association with actinopterygian sarcopterygian fishes rarer turtles, crocodylomorphs theropod dinosaurs. chondrichthyan assemblage is represented by isolated teeth, cephalic spines, dorsal fin spines. This first record Gondwana.

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