Gasulla, José MiguelEscaso Santos, FernandoNarváez Padilla, IvánOrtega Coloma, Francisco JavierSanz, José Luis2025-12-042025-12-042015-12-16Gasulla, J.M., Escaso, F., Narváez, I., Ortega, F., Sanz, J.L. (2015) A New Sail-Backed Styracosternan (Dinosauria: Ornithopoda) from the Early Cretaceous of Morella, Spain. PLoS ONE 10(12): e0144167.1932-6203https://doi.org/10.1371/journal.pone.0144167https://hdl.handle.net/20.500.14468/31023The registered version of this article, first published in PLoS ONE, is available online at the publisher's website: EDITOR, https://doi.org/10.1371/journal.pone.0144167La versión registrada de este artículo, publicado por primera vez en PLoS ONE, está disponible en línea en el sitio web del editor: EDITOR, https://doi.org/10.1371/journal.pone.0144167Anewstyracosternan ornithopod genus and species is here described based on a partial postcranial skeleton and an associated dentary tooth of a single specimen from the Arcillas deMorella Formation (Early Cretaceous, late Barremian) at the Morella locality, (Castellón, Spain). Morelladon beltrani gen. et sp. nov. is diagnosed by eight autapomorphic features. Theset of autapomorphies includes: very elongated and vertical neural spines of the dorsal vertebrae, midline keel on ventral surface of the second to fourth sacral vertebrae restricted to the anterior half of the centrum, a posterodorsally inclined medial ridge on the postacetabular process of the ilium that meets its dorsal margin and distal end of the straight ischial shaft laterally expanded, among others. Phylogenetic analyses reveal that the new Iberian form is more closely related to its synchronic and sympatric contemporary European taxa Iguanodon bernissartensis and Mantellisaurus atherfieldensis, known from Western Europe, than to other Early Cretaceous Iberian styracosternans (Delapparentia turolensis and Proavaldearinnoensis). The recognition of Morelladon beltrani gen. et sp. nov. indicates that the Iberian Peninsula was home to a highly diverse medium to large bodied styracosternan assemblage during the Early Cretaceous.eninfo:eu-repo/semantics/openAccess2204 Física de Fluidosartículo