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A new clade of archaic large-bodied predatory dinosaurs (Theropoda: Allosauroidea) that survived to the latest Mesozoic

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dc.contributor.author Benson, Roger B. J. en
dc.contributor.author Carrano, Matthew T. en
dc.contributor.author Brusatte, Stephen L. en
dc.date.accessioned 2010-02-12T20:10:59Z
dc.date.available 2010-02-12T20:10:59Z
dc.date.issued 2010
dc.identifier.citation Benson, Roger B. J., Carrano, Matthew T., and Brusatte, Stephen L. 2010. "<a href="https://repository.si.edu/handle/10088/8609">A new clade of archaic large-bodied predatory dinosaurs (Theropoda: Allosauroidea) that survived to the latest Mesozoic</a>." <em>Naturwissenschaften</em>. 97 (1):71&ndash;78. <a href="https://doi.org/10.1007/s00114-009-0614-x">https://doi.org/10.1007/s00114-009-0614-x</a> en
dc.identifier.issn 0028-1042
dc.identifier.uri http://hdl.handle.net/10088/8609
dc.description.abstract Non-avian theropod dinosaurs attained large body sizes, monopolising terrestrial apex predator niches in the Jurassic-Cretaceous. From the Middle Jurassic onwards, Allosauroidea and Megalosauroidea comprised almost all large-bodied predators for 85 million years. Despite their enormous success, however, they are usually considered absent from terminal Cretaceous ecosystems, replaced by tyrannosaurids and abelisaurids. We demonstrate that the problematic allosauroids Aerosteon, Australovenator, Fukuiraptor and Neovenator form a previously unrecognised but ecologically diverse and globally distributed clade (Neovenatoridae, new clade) with the hitherto enigmatic theropods Chilantaisaurus, Megaraptor and the Maastrichtian Orkoraptor. This refutes the notion that allosauroid extinction pre-dated the end of the Mesozoic. Neovenatoridae includes a derived group (Megaraptora, new clade) that developed long, raptorial forelimbs, cursorial hind limbs, appendicular pneumaticity and small size, features acquired convergently in bird-line theropods. Neovenatorids thus occupied a 14-fold adult size range from 175 kg (Fukuiraptor) to approximately 2,500 kg (Chilantaisaurus). Recognition of this major allosauroid radiation has implications for Gondwanan paleobiogeography: The distribution of early Cretaceous allosauroids does not strongly support the vicariant hypothesis of southern dinosaur evolution or any particular continental breakup sequence or dispersal scenario. Instead, clades were nearly cosmopolitan in their early history, and later distributions are explained by sampling failure or local extinction. en
dc.relation.ispartof Naturwissenschaften en
dc.title A new clade of archaic large-bodied predatory dinosaurs (Theropoda: Allosauroidea) that survived to the latest Mesozoic en
dc.type Journal Article en
dc.identifier.srbnumber 81332
dc.identifier.doi 10.1007/s00114-009-0614-x
rft.jtitle Naturwissenschaften
rft.volume 97
rft.issue 1
rft.spage 71
rft.epage 78
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Paleobiology en
dc.citation.spage 71
dc.citation.epage 78


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