Abstract
This contribution presents the partial results of an investigation plan of a reptile teeth set, collected from one of the richest and most diversified fossil deposits from the middle Cretaceous from the State of Maranhão, Brazil: the Laje do Coringa. Situated in the Cajual Island, Alcântara Municipality, it consists of bone-bed with an expressive fossil record, late Albian/early Cenomanian in age, belonging to the Alcântara Formation, São Luís-Grajaú Basin. Analysis of morphologic parameters of teeth crown suggests an association of at least four morphotypes to Ornithocheiroidea pterosaurs. Based on this interpretation, this group, which has a diversified record in the middle Cretaceous deposits from the Santana Formation, Araripe Basin, has now its first occurrence demonstrated in the São Luís-Grajaú Basin.
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