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In the Recôncavo Basin, Bahia State, Samuel Allport and latter Charles F. Hartt collected several fossils, being some of them attributed to reptile teeth. Based on the morphotypes of these teeth Othniel C. Marsh nominated two species, the fi rst with “delicately wrinkled surface” as Crocodylus hartti (currently Sarcosuchus hartti), and the second based on teeth with “strong continuous striae, and coarse riblets” as Thoracosaurus bahiensis, this latter will be the focus of this work. Marsh did not designate any holotype and, thus, the fi ve teeth collected and described by Allport became the type series and subsequently the syntypes of the species. However, these are currently lost. Comparing the diagnoses of T. bahiensis with the type species of the genus and with others crocodyliformes as well as spinosaurids, we noted that the supposed autapomorphy of the species is highly variable. Therefore, we propose that T. bahiensis should be considered as nomen dubium.

revista brasileira de paleontologia

Taxonomic revision of Thoracosaurus bahiensis Marsh, 1869, a supposed Gavialoidea (Reptilia, Crocodylia) from Cretaceous deposits of the Recôncavo Basin, Brazil