The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis
terrestrial fauna, which includes the nearly complete theropod dinosaur, Cryolophosaurus ellioti, and a fragmentary basal sauropodomorph dinosaur. The Hanson Formation dinosaurs are important for understanding early dinosaur evolution because: 1) they preserve a mosaic of morphological traits that r...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.503.7543 2023-05-15T13:52:23+02:00 The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis N. D. Smith P. J. Makovicky D. Pol W. R. Hammer P. J. Currie The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.7543 http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.7543 http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf text ftciteseerx 2016-01-08T09:16:03Z terrestrial fauna, which includes the nearly complete theropod dinosaur, Cryolophosaurus ellioti, and a fragmentary basal sauropodomorph dinosaur. The Hanson Formation dinosaurs are important for understanding early dinosaur evolution because: 1) they preserve a mosaic of morphological traits that render them useful for interpreting poorly known parts of the dinosaur evolutionary tree; 2) they are from the Early Jurassic, a critical period in early dinosaur evolution about which knowledge is scant; and 3) they are the only known Early Jurassic dinosaurs from Antarctica, making them particularly valuable for understanding patterns of biotic interchange during this time. Recent research suggests that Cryolophosaurus belongs to a geographically widespread clade of mid-sized, Early Jurassic theropods with cranial crests that includes Dilophosaurus wetherilli, ‘Dilophosaurus ’ sinensis, and Dracovenator, and renders Coelophysoidea sensu lato non-monophyletic. The Antarctic sauropodomorph represents a distinct taxon that is a member of a similarly diverse massospondylid clade. This taxon shares a number of features with more derived sauropodomorphs, and provides additional evidence for the paraphyly of Prosauropoda. The phylogenetic relationships of the Antarctic dinosaurs are also consistent with a pattern of worldwide faunal homogeneity between Early Jurassic Text Antarc* Antarctic Antarctica Unknown Antarctic The Antarctic Transantarctic Mountains |
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description |
terrestrial fauna, which includes the nearly complete theropod dinosaur, Cryolophosaurus ellioti, and a fragmentary basal sauropodomorph dinosaur. The Hanson Formation dinosaurs are important for understanding early dinosaur evolution because: 1) they preserve a mosaic of morphological traits that render them useful for interpreting poorly known parts of the dinosaur evolutionary tree; 2) they are from the Early Jurassic, a critical period in early dinosaur evolution about which knowledge is scant; and 3) they are the only known Early Jurassic dinosaurs from Antarctica, making them particularly valuable for understanding patterns of biotic interchange during this time. Recent research suggests that Cryolophosaurus belongs to a geographically widespread clade of mid-sized, Early Jurassic theropods with cranial crests that includes Dilophosaurus wetherilli, ‘Dilophosaurus ’ sinensis, and Dracovenator, and renders Coelophysoidea sensu lato non-monophyletic. The Antarctic sauropodomorph represents a distinct taxon that is a member of a similarly diverse massospondylid clade. This taxon shares a number of features with more derived sauropodomorphs, and provides additional evidence for the paraphyly of Prosauropoda. The phylogenetic relationships of the Antarctic dinosaurs are also consistent with a pattern of worldwide faunal homogeneity between Early Jurassic |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
N. D. Smith P. J. Makovicky D. Pol W. R. Hammer P. J. Currie |
spellingShingle |
N. D. Smith P. J. Makovicky D. Pol W. R. Hammer P. J. Currie The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
author_facet |
N. D. Smith P. J. Makovicky D. Pol W. R. Hammer P. J. Currie |
author_sort |
N. D. Smith |
title |
The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
title_short |
The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
title_full |
The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
title_fullStr |
The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
title_full_unstemmed |
The Dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic Review and Synthesis |
title_sort |
dinosaurs of the early jurassic hanson formation of the central transantarctic mountains: phylogenetic review and synthesis |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.7543 http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf |
geographic |
Antarctic The Antarctic Transantarctic Mountains |
geographic_facet |
Antarctic The Antarctic Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.7543 http://pubs.usgs.gov/of/2007/1047/srp/srp003/of2007-1047srp003.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766256660833107968 |