Topic
Amurosaurus
About: Amurosaurus is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 222 citations.
Papers
Journal Article•
TL;DR: Amurosaurus riabinini as discussed by the authors is a valid species, characterised by cranial and postcranial autapomorphies, and it occupies a relatively basal position within the lambeosaurine subfamily as the sister taxon of a monophyletic group formed by the parasauroloph and corythosaur clades.
Abstract: Amurosaurus riabinini Bolotsky and Kurzanov, 1991 (Dinosauria, Hadrosauridae) is described on the basis of numerous disarticulated bones from the Maastrichtian Udurchukan Formation of Blagoveschensk, Far Eastern Russia. Compari− sons with North American palynozones and their well−calibrated ages suggest that this formation is late Maastrichtian in age. It is shown that A. riabinini is a valid species, characterised by cranial and postcranial autapomorphies. A phylogen− etic analysis, based on 40 cranial, dental, and postcranial characters, indicates that this taxon occupies a relatively basal position within the lambeosaurine subfamily as the sister−taxon of a monophyletic group formed by the parasauroloph and corythosaur clades. This cladogram also demonstrates that lambeosaurines have an Asian origin. In eastern Asia, lambeosaurine dinosaurs dominate late Maastrichtian dinosaur localities, whereas this group is apparently no longer rep− resented in synchronous localities from western North America.
103 citations
TL;DR: A new hadrosaurid dinosaur, Arenysaurus ardevoli gen. et al. as discussed by the authors, from the Late Maastrichtian of Aren (Huesca, South-central Pyrenees) is described on the basis of a partial, articulated skull, mandibular remains and postcranial elements, including vertebrae, girdle and limb bones.
89 citations
1 Jan 2009
TL;DR: Pereda-Suberbiola et al. as discussed by the authors described a new hadrosaurid dinosaur, Arenysaurus ardevoli gen. nov., from the Late Maastrichtian of Aren (Huesca, South-central Pyrenees) based on a partial, articulated skull, mandibular remains and postcranial elements, including vertebrae, girdle and limb bones.
Abstract: A new hadrosaurid dinosaur, Arenysaurus ardevoli gen. et sp. nov., from the Late Maastrichtian of Aren (Huesca, South-central Pyrenees) is described on the basis of a partial, articulated skull, mandibular remains and postcranial elements, including vertebrae, girdle and limb bones. Arenysaurus is characterized by having a very prominent frontal dome; nearly vertical prequadratic (squamosal) and jugal (postorbital) processes, and deltopectoral crest of the humerus oriented anteriorly. Moreover, it possesses a unique combination of characters: short frontal (length/width approximately 0.5); midline ridge of parietal at level of the postorbitalsquamosal bar; parietal excluded from the occiput; squamosal low above the cotyloid cavity. A phylogenetical analysis indicates that Arenysaurus is a rather basal member of Lambeosaurinae and the sister-taxon to Amurosaurus and the CorythosauriniParasaurolophini clade. The phylogenetic and biogeographical relationships of Arenysaurus and other lambeosaurines suggest a palaeogeographical connection between Asia and Europe during the Late Cretaceous. To cite this article: X. Pereda-Suberbiola
55 citations
TL;DR: The relatively large size of the cerebrum is consistent with the range and complexity of social behaviors inferred for lambeosaurine dinosaurs.
Abstract: Information on the structure of the brain of the lambeosaurine hadrosaurid dinosaur Amurosaurus riabinini, from the Late Maastrichtian of Blagoveschensk, Far Eastern Russia, is presented based on endocranial casts The endocasts are compared with physical and digital endocasts of other dinosaurs The olfactory tract was large The cerebral hemispheres are enlarged and round, illustrating the important development of this part of the brain in hadrosaurids The pituitary body is enlarged as well, perhaps prefiguring the large size attained by hadrosaurids The EQ of Amurosaurus was similar to that of the lambeosaurine dinosaur Hypacrosaurus altispinus and was relatively larger than in most extant non-avian reptiles, including sauropod and ceratopsian dinosaurs However, it was apparently relatively smaller than those of most theropod dinosaurs The relatively large size of the cerebrum is consistent with the range and complexity of social behaviors inferred for lambeosaurine dinosaurs
21 citations
TL;DR: The juvenile status of Kazaklambia makes phylogenetic placement difficult; however, morphometric and morphological information suggest a close affiliation with the basal lambeosaurines Amurosaurus and Tsintaosaurus, and support the hypothesis for an Asian origin for Lam beosaurinae.
13 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2013 | 2 |
| 2009 | 2 |
| 2008 | 1 |
| 2004 | 1 |