text: Full Text Available In 1928, JosÃ© Royo GÃ³mez mentioned the find of â€œtwo teeth similar to those of theropod dinosaurs from the Secondaryâ€� in the Eocene of Llamaquique (Oviedo Basin, Asturias. Royo GÃ³mez was aware of the interest of the discovery, â€œbecause they would be the youngest remains found of these gigantic reptilesâ€�. According to the hitherto unpublished documents preserved in the Archives of the Museo Nacional de Ciencias Naturales in Madrid, Royo GÃ³mez photographed five teeth from Llamaquique in April 1932, which he regarded as belonging to theropods. The whereabouts of this material is currently unknown. However, the revision of the Llamaquique collection in the above mentioned museum has allowed to recover one labiolingually compressed and serrated tooth (ziphodont condition. We reject here that the tooth belongs to a theropod, and we assign it to a Mesoeucrocodylia indet. This is the first mention of the discovery of ziphodont crocodyliforms in the Paleogene of Asturias.