This is a spinosaurid tooth recovered during the excavations in the vertebrate fossil site called "Camino de la Algecira", from Ladruñán, Teruel province.
This fossil locality is a vertebrate skeletal concentration with disarticulated bones and teeth of several individuals. Dinosaur bones are the most frequent remains, with at least two undetermined dinosaur taxa (iguanodontian and theropod). Crocodylomorph teeth and scarce osteichthyan remains are also present. In addition to the vertebrate remains, plant remains and internal casts of freshwater bivalves are profuse. Oyster remains sometimes encrust the bone surfaces.
Some articles on this Barremian fossil site:
Bauluz, B., Gasca, J.M., Moreno-Azanza, M., Canudo, J.I. 2014. Unusual replacement of biogenic apatite by aluminium-phosphate phases in dinosaur teeth of Early Cretaceous of Spain. Lethaia, 47, 556-566.
Gasca, J.M., Canudo, J.I., y Moreno-Azanza, M. 2009. New iguanodontian dinosaur remains from the Early Barremian of Spain (Castellote, Teruel). 69th Annual Meeting Society of Vertebrate Paleontology and the 57th Symposium of Vertebrate Palaeontology and Comparative Anatomy (SVPCA), University of Bristol, United Kingdom, September 23-26, Journal of Vertebrate Paleontology, 29, supplement to number 3, 103A. DOWNLAD
Gasca, J.M. 2011. Conociendo a los dinosaurios de Ladruñán. Peirón, 21, Centro de Estudios del Maestrazgo Turolense, 16-22. DOWNLOAD