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Sterling J. Nesbitt Randall B. Irmis Spencer G. Lucas Adrian P. Hunt 《Pal?ontologische Zeitschrift》2005,79(4):471-478
A new genus and species of giant crocodylomorph from the Upper Triassic of New Mexico is described.Redondavenator quayensis n. gen. et n. sp. (Crocodylomorpha: Sphenosuchia) has a very long posterior process of the premaxilla that fits between the
nasal and the maxilla, and a long postglenoid process on the coracoid. These synapomorphies place it within the Crocodylomorpha.Redondavenator also has a System of grooves and pits that cover the anterior portions of the maxillae, the entire premaxillae, and the anterior
part of the nasal. Possible foramina among the network of grooves and pits on the anterior portion of the skull may represent
a rudimentary sensory System that is common to many extinct and ail extant crocodilians. Its exact phylogenetic position could
not be determined from the preserved material, but key characters suggest a phylogenetic position near the base of Sphenosuchia.
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We report on and name two new taxa of basal crocodylomorph archosaurs from the Lower Jurassic, Litargosuchus leptorhynchus gen. et sp. nov. , from the upper Elliot Formation (Stormberg Group) of South Africa, and Kayentasuchus walkeri gen. et sp. nov. , from the Kayenta Formation (Glen Canyon Group) of Arizona, USA. Examination of this material led to a reconsideration of basal crocodylomorph interrelationships. A phylogenetic analysis found no support for the monophyly of Sphenosuchia. © 2002 The Linnean Society of London. Zoological Journal of the Linnean Society , 2002, 136 , 77–95. 相似文献
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