Diversity of hadrosauroid dinosaurs from the Late Cretaceous Ibero-Armorican Island (European Archipelago) assessed from dentary morphology |
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| Institution: | 1. Institut Català de Paleontologia, Universitat Autònoma de Barcelona, Escola Industrial 23, 08201, Sabadell, Spain;2. School of Earth Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, UK;3. Transmitting Science, Gardenia 2, 08784, Can Claramunt, Piera, Barcelona, Spain;1. Department of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia;2. Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada;3. North Carolina Museum of Natural Sciences, North Carolina State University, Raleigh, NC 27601, USA;1. Natural History Museum of Guangxi, Nanning, 530012, China;2. Guangxi Institute of Regional Geological Survey, Guilin, 541003, China;3. Fusui Bureau of Natural Resources, Fusui, 532199, China;4. CNRS (UMR 8538), Laboratoire de Géologie de l''Ecole Normale Supérieure, PSL Research University, 24 rue Lhomond, 75231, Paris Cedex 05, France;5. Palaeontological Research and Education Centre, Mahasarakham University, Kantarawichai, Mahasarakham, 44150, Thailand;6. Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Science, Beijing, 100044, China;7. Univ Lyon, Université Claude Bernard Lyon 1, ENS de Lyon, CNRS, UMR 5276 LGL-TPE, F-69622, Villeurbanne, France;1. Eötvös University, Department of Palaeontology, Dinosaur Research Group, Pázmány Péter Sétány 1/c, Budapest, 1117, Hungary;2. Hungarian Natural History Museum, Ludovika Tér 2, Budapest, 1083, Hungary;3. Natural History Museum, Burgring 7, 1010, Vienna, Austria;4. University of Vienna, Department of Geodynamics and Sedimentology, Althanstraße 14, Vienna, 1090, Austria;5. Mining and Geological Survey of Hungary, Department of Geological and Geophysical Collections, Stefánia út 14, Budapest, 1143, Hungary |
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| Abstract: | A substantial part of the European record of hadrosauroid ornithopod dinosaurs comes from the Maastrichtian (Upper Cretaceous) strata of the south-central Pyrenees (northern Catalunya and Aragón, northeastern Spain). Yet, our understanding on the taxonomy and phylogenetic systematics of these animals in this region is hindered by the lack of complete specimens, paucity of diagnostic material, and poor preservation of the fossils. The Basturs Poble site (Lleida Province, northern Catalunya) has yielded over 900 bones attributed to a hadrosauroid monodominant population. The dentary is the most common, and one of the better-preserved elements found in this locality. Here, we evaluate the utility of dentary morphology as an indicator of hadrosauroid taxonomic diversity. We do so via principal component analysis, cluster analysis, and mean comparison tests of various morphometric data from the available sample of dentaries collected so far in the Basturs Poble locality and other Maastrichtian sites in northeastern Spain. Three different dentary morphotypes are recognized: two different hadrosauroids, one more derived than the other, and one lambeosaurine type. One of the hadrosauroid morphotypes corresponds to relatively small individuals that may represent insular dwarf species. Concerning Basturs Poble locality, our results suggest the coexistence of hadrosauroid and lambeosaurine dinosaurs during the late Maastrichtian on the Ibero-Armorican Island. |
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| Keywords: | Hadrosauroidea Maastrichtian Late Cretaceous Dentary Multivariate analysis Statistical analysis |
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