| 词条 | Blasisaurus |
| 释义 |
| taxon = Blasisaurus | name = Blasisaurus | fossil_range = Late Cretaceous, {{fossilrange|66}} | image = Blasisaurus.png | image_caption = Skull fossils | type_species = {{extinct}}Blasisaurus canudoi | authority = Cruzado-Caballero et al., 2010 | type_species_authority = Cruzado-Caballero et al., 2010 }} Blasisaurus is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous. It is known from a partial skull and skeleton found in late Maastrichtian-age rocks of Spain.[1] The type species is Blasisaurus canudoi, described in 2010 by Penélope Cruzado-Caballero, Xabier Pereda-Suberbiola and José Ignacio Ruiz-Omeñaca, a group of researchers from Spain. Naming and discoveryThe generic name refers to the Blasi 1 site where the fossil was found. The specific epithet honours paleontologist José Ignacio Canudo.[1] The holotype, MPZ99/667, is housed in Huesca. It was found in a layer of the Arén Formation dating from the upper Maastrichtian, about 66 million years old.[1] It consists of a skull with fragmentary lower jaws.[1] DescriptionBlasisaurus is a medium-sized euornithopod. The describers have been able to identify two distinct features: the cheekbone has a rear projection with a hook-shaped upper edge, and the lower sleep window is narrow and D-shaped.[1] From the same formation is Arenysaurus, a related species. They are not identical, distinguished by the shape of the teeth and missing secondary ridges. Blasisaurus also differs from Koutalisaurus by a downwardly bent front edge of the lower jaws.[1]PhylogenyThe describers performed an exact cladistic analysis to determine its phylogenetic position. The outcome of the phylogenetic analysis placed Blasisaurus as the sister taxon to Arenysaurus.[1] Together they form a clade that is higher in Lambeosaurinae than Tsintaosaurus and Jaxartosaurus. Whether this clade was more derived than Amurosaurus, the closest relative of the group, was not determined.[1] However, one study did find that they were not sister taxa, no other studies supported this.[2] Blasisaurus confirmed the hypothesis that in the Late Cretaceous, different Hadrosaurids from Asia and Europe was a sign that they migrated across land bridges that must have been present.[1] Where in lambeosaurinae Blasisaurus and Arenysaurus fall is disputed. They have been found to be in lambeosaurini,[3] as basal to the Lambeosaurini-Parasaurolophini split,[1] and in Parasaurolophini.[2][4] Below is the most recent cladogram published including Blasisaurus and Arenysaurus, found by Penélope Cruzado-Caballero et al. in 2013:[4] {{clade| style=font-size:90%; line-height:90%|label1=Hadrosauridae |1={{clade |1=Gryposaurus notabilis |2={{clade |1=Aralosaurus tuberiferus |label2=Lambeosaurinae |2={{clade |1={{clade |1=Pararhabdodon isonensis |2=Tsintaosaurus spinorhinus }} |2={{clade |1=Jaxartosaurus aralensis |2={{clade |1=Amurosaurus riabinini |2={{clade |1=Sahaliyania elunchunorum |label2=Parasaurolophini |2={{clade |1=Charonosaurus jiayinensis |2={{clade |1={{clade |1=Blasisaurus canudoi |2=Arenysaurus ardevoli }} |label2=Parasaurolophus |2={{clade |1=Parasaurolophus cyrtocristatus |2={{clade |1=Parasaurolophus tubicen |2=Parasaurolophus walkeri }} }} }} }} |label3=Lambeosaurini |3={{clade |label1=Lambeosaurus |1={{clade |1=Lambeosaurus magnicristatus |2=Lambeosaurus lambei }} |2={{clade |1=Velafrons coahuilensis |2=Hypacrosaurus altispinus |3=Hypacrosaurus stebingeri |4=Olorotitan arharensis |5=Corythosaurus casuarius }} }} }} }} }} }} }} }} }} See also{{Portal|Dinosaurs}}
References1. ^1 2 3 4 5 6 7 8 9 {{cite journal |last=Cruzado-Caballero |first=Penélope |author2=Xabier Pereda-Suberbiola |author3=José Ignacio Ruiz-Omeñaca |year=2010 |title=Blasisaurus canudoi gen. et sp. nov., a new lambeosaurine dinosaur (Hadrosauridae) from the Latest Cretaceous of Arén (Huesca, Spain) |url=http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=eng&journal=cjes&volume=47&year=0&issue=12&msno=e10-081 |journal=Canadian Journal of Earth Sciences |volume=47 |issue=12 |pages=1507–1517 |doi=10.1139/E10-081 }}{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }} {{Ornithopoda|H.}}{{Taxonbar|from=Q1705531}}{{ornithopod-stub}}2. ^1 {{cite conference|last1=Cruzado-Caballero|first1=P.|last2=Canudo|first2=J.I.|last3=Moreno-Azanza|first3=M.|last4=Ruiz-Omeñaca|first4=J.I.|chapter=The Complex Fauna of European Maastrichtian Hadrosaurids: Contributions of the Lambeosaurines of the Iberian Peninsula|chapter-url=http://aragosaurus.com/secciones/publicaciones/artic/Cruzado-Caballero_etal_2011.pdf|pages=33–37|editor1-last=Braman|editor1-first=D.R.|editor2-first=D.A|editor2-last=Eberth|editor3-first=D.C.|editor3-last=Evans|editor4-first=W.|editor4-last=Taylor|conference=International Hadrosaur Symposium at the Royal Tyrrell Museum of Palaeontology|title=Hadrosaur Symposium 2011 {{ndash}} Abstract Volume|url=http://www.tyrrellmuseum.com/media/HadrSymp2011Abstract.pdf|date=September 22{{ndash}}23, 2011|location=Drumheller, Alberta, Canada}} 3. ^{{Cite journal | last1 = Prieto-Márquez | first1 = A. | last2 = Dalla Vecchia | first2 = F. M. | last3 = Gaete | first3 = R. | last4 = Galobart | first4 = À. | editor1-last = Dodson | editor1-first = Peter | title = Diversity, Relationships, and Biogeography of the Lambeosaurine Dinosaurs from the European Archipelago, with Description of the New Aralosaurin Canardia garonnensis | doi = 10.1371/journal.pone.0069835 | journal = PLoS ONE | volume = 8 | issue = 7 | pages = e69835 | year = 2013 | pmid = 23922815| pmc = 3724916}} 4. ^1 {{Cite journal | doi = 10.1080/02724634.2013.772061| title = New material and phylogenetic position of Arenysaurus ardevoli, a lambeosaurine dinosaur from the late Maastrichtian of Arén (northern Spain)| journal = Journal of Vertebrate Paleontology| volume = 33| issue = 6| pages = 1367–1384| year = 2013| last1 = Cruzado-Caballero | first1 = P. L. | last2 = Canudo | first2 = J. I. | last3 = Moreno-Azanza | first3 = M. | last4 = Ruiz-Omeñaca | first4 = J. I. }} 4 : Late Cretaceous dinosaurs of Europe|Lambeosaurines|Fossil taxa described in 2010|Paleontology in Spain |
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