Journal
CANADIAN JOURNAL OF EARTH SCIENCES
Volume 47, Issue 12, Pages 1507-1517Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/E10-081
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Funding
- Ministerio de Ciencia e Innovacion of Spain [CGL2004-03393, CGL2007-62469, CGL2007-64061/BTE, CGL2010-16447/BTE, CGL-18851/BTE]
- Gobierno de Aragon (Grupos Consolidados, Departamento de Educacion y Cultura)
- Gobierno Vasco/EJ [GIC07/14-361]
- Principado de Asturias [CN-04-226]
- Gobierno de Aragon
- Diputacion Provincial de Huesca
- Ayuntamiento de Aren
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Blasisaurus canudoi gen. et sp. nov. is described on the basis of disarticulated skull and lower jaw remains found in the Blasi 1 locality of Aren (Huesca, south-central Pyrenees of Spain), located in the upper part of the Aren Formation, late Maastrichtian in age. This new lambeosaurine hadrosaurid is characterized by a jugal combining a hook-like dorsal edge of the posterior process and a narrow, D-shaped infratemporal fenestra. Blasisaurus differs from Arenysaurus from the Blasi 3 site of Aran mainly by the absence of secondary ridges in the dentary teeth, and from Koutalisaurus (probably a junior synonym of Pararhabdodon) from the Isona region of Lleida by the anteriormost portion of the dentary that is modestly deflected ventrally. A phylogenetic analysis places Blasisaurus as closely related to Arenysaurus in a clade of basal lambeosaurines more derived than Tsintaosaurus and Jaxartosaurus; this clade forms part of a polytomy with Amurosaurus and with more derived lambeosaurines. Palaeobiogeographically, the presence of Blasisaurus and other hadrosaurids in the Maastrichtian European archipelago suggests one or, more probably, a series of dispersal events from Asia across intermittent land bridges during the second half of the Late Cretaceous.
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