On the diversity of Iberian iguanodont dinosaurs: New fossils from the lower Barremian, Teruel province, Spain

Abstract

New fossils from the lower Barremian (Lower Cretaceous) of Spain increase the known occurrence of iguanodont dinosaurs (i.e. members of the clade Iguanodontia) in the Iberian Peninsula. A partial dentary and ischium from the fossil locality of La Cantalera 2 (Blesa Formation, municipality of Josa, Teruel province) testify to the presence of a new specimen in the early Barremian of Iberia, closely related to Delapparentia turolensis, which was previously only known in the type locality (La Maca-3, Camarillas Formation, municipality of Galve, Teruel province). These new fossils are assigned to Delapparentia turolensis (ischium) and cf. Delapparentia sp. (dentary). Moreover, the description and comparison of some of the characters of the ischium reveal that this bone is of previously unnoticed relevance for iguanodont systematics. The differences in overlapping postcranial material – observed by comparing ischial material from the provinces of Teruel and Burgos – lead us to conclude that late Hauterivian-early Barremian iguanodont diversity in Iberia consists of at least two different taxa: Delapparentia turolensis and another form closely related to Iguanodon. Additionally, dental morphotypes from La Cantalera bonebed evince the presence of at least three different iguanodonts in the lower Barremian of Iberia.