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Canardia, new lambeosaurine hadrosaurid from Late Cretaceous of France



From: Ben Creisler
bcreisler@gmail.com

New in PLoS ONE:

Albert Prieto-Márquez, Fabio M. Dalla Vecchia, Rodrigo Gaete & Àngel
Galobart (2013)
Diversity, Relationships, and Biogeography of the Lambeosaurine
Dinosaurs from the European Archipelago, with Description of the New
Aralosaurin Canardia garonnensis.
PLoS ONE 8(7): e69835.
doi:10.1371/journal.pone.0069835
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0069835

We provide a thorough re-evaluation of the taxonomic diversity,
phylogenetic relationships, and historical biogeography of the
lambeosaurine hadrosaurids from the European Archipelago. Previously
published occurrences of European Lambeosaurinae are reviewed and new
specimens collected from upper Maastrichtian strata of the
south-central Pyrenees are described. No support is found for the
recognition of European saurolophines in the available hadrosaurid
materials recovered so far from this area. A new genus and species of
basal lambeosaurine, Canardia garonnensis, is described on the basis
of cranial and appendicular elements collected from upper
Maastrichtian strata of southern France. C. garonnensis differs from
all other hadrosaurids, except Aralosaurus tuberiferus, in having
maxilla with prominent subrectangular rostrodorsal flange; it differs
from A. tuberiferus in a few maxillary and prefrontal characters.
Together with A. tuberiferus, C. garonnensis integrates the newly
recognized tribe Aralosaurini. Inference of lambeosaurine
interrelationships via maximum parsimony analysis indicates that the
other three known European lambeosaurines are representatives of two
additional subclades (tribes) of these hadrosaurids: Tsintaosaurini
(Pararhabdodon isonensis) and Lambeosaurini (the Arenysaurus
ardevoli-Blasisaurus canudoi clade). The tribes Aralosaurini,
Tsintaosaurini, Lambeosaurini, and Parasaurolophini are formally
defined and diagnosed for the first time. Three event-based
quantitative methods of ancestral range reconstruction were
implemented to infer the historical biogeography of European
lambeosaurines: Dispersal-Vicariance Analysis, Bayesian Binary MCMC,
and Dispersal-Extinction-Cladogenesis. The results of these analyses,
coupled with the absence of pre-Maastrichtian lambeosaurines in the
Mesozoic vertebrate fossil record of Europe, favor the hypothesis that
aralosaurins and tsintaosaurins were Asian immigrants that reached the
Ibero-Armorican island via dispersal events sometime during the
Maastrichtian. Less conclusive is the biogeographical history of
European lambeosaurins; several scenarios, occurring sometime during
the Maastrichtian, are possible, from vicariance leading to the
splitting of Asian or North American from European ranges to a
dispersal event from North America to the European Archipelago.