Evidence of the coexistence of hadrosaurine and lambeosaurine dinosaurs in the upper Maastrichtian of the Iberian Peninsula (Arén, Huesca, Spain). Many cranial and postcranial remains of hadrosaurid ornithopods from the upper Maastrichtian have been recovered in Arén (Huesca, Spain) in the sites Blasi 1–5. Three of these cranial remains, found at Blasi 1 (Arén Formation), and Blasi 4 and 5 (Conques Formation) are jugals and are the only jugals described from Western Europe. The jugals from Arén differ from those of Telmatosaurus transsylvanicus (Nopcsa, 1900) by being these more slender and presenting an anterior process isosceles-triangle-like. The jugals found at Arén are assigned provisionally to the subfamilies Hadrosaurinae (Blasi 5) and Lambeosaurinae (Blasi 1 and 4). The hadrosaurine jugal presents an asymmetrical anterior process along the maxilla-lacrimal contact and a wide jugal neck, while the jugals of lambeosaurines have an anterior process very wide dorsoventrally and symmetric, narrow jugal neck and maxillary process perpendicular to the antero-posterior axis of the jugal. The hadrosaurine from Arén represents the first mention of the subfamily in Europe and, together with the remains of lambeosaurines found in Europe, shows an active interaction with the migratory route existing then between Asia and North America. Remains found in Arén are essential in the knowledge of the phylogenetic relationships and the biogeography of this clade in Europe.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 47 • No. 2