Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China
The cranial osteology of the large ichthyosaur Guizhouichthyosaurus tangae from the Wayao Member of the Falang Formation (Lower Carnian, Upper Triassic) of Guizhou, southwest China, is described, based on a well preserved skull and mandible and additional specimens. It can be diagnosed by a suite of...
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journal of vertebrate paleontology
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ftpekinguniv:oai:localhost:20.500.11897/251582 2023-05-15T18:27:14+02:00 Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China Maisch, Michael W. Pan, Xin-Ru Sun, Zuo-Yu Cai, Tao Zhang, Da-Peng Xie, Jia-Lin Maisch, MW (reprint author), Univ Tubingen, Inst & Museum Geol & Palaontol, Sigwartstr 10, Tubingen, Germany. Univ Tubingen, Inst & Museum Geol & Palaontol, Tubingen, Germany. Peking Univ, Dept Geol, Beijing 100871, Peoples R China. Peking Univ, Geol Museum, Beijing 100871, Peoples R China. Guanling Natl Geopk Fossil Biota, Anshun City 561300, Guizhou, Peoples R China. Univ Tubingen, Inst & Museum Geol & Palaontol, Sigwartstr 10, Tubingen, Germany. 2006 https://hdl.handle.net/20.500.11897/251582 https://doi.org/10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 en eng journal of vertebrate paleontology JOURNAL OF VERTEBRATE PALEONTOLOGY.2006,26,(3),588-597. 976372 0272-4634 http://hdl.handle.net/20.500.11897/251582 doi:10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 WOS:000240609700011 SCI SPITZBERGEN GUIZHOU GENUS Journal 2006 ftpekinguniv https://doi.org/20.500.11897/251582 https://doi.org/10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 2021-08-01T08:55:43Z The cranial osteology of the large ichthyosaur Guizhouichthyosaurus tangae from the Wayao Member of the Falang Formation (Lower Carnian, Upper Triassic) of Guizhou, southwest China, is described, based on a well preserved skull and mandible and additional specimens. It can be diagnosed by a suite of cranial characters that include premaxilla without well-developed processus subnarialis, maxilla reaches far anteriorly and has a very long processus postnarialis, orbit of characteristic shape with concave dorsal and straight posterior and ventral margins, small prefrontal that forms only the anterior third of the dorsal orbital margin, postfrontal meets the supratemporal externally, postorbital forms a large part of the lateral margin of the temporal fenestra internally, deep triangular incisura postjugalis, jugal fails to meet quadratojugal externally, short postorbital skull segment; frontals and parietals form sharp ridges lateral to the area of the foramen parietale; parietals form a low and narrow sagittal crest; teeth thecodontously implanted, blunt, conical and without carinae. New data on the postcranial skeleton are also provided. The available evidence indicates that Guizhouichthyosaurus is an advanced member of the Merriamosauria, but more plesiomorphic than the parvipelvians. The taxonomy of the large ichthyosaurs from the Falang Formation remains largely problematic. It appears probable that only two taxa are valid, Guizhouichthyosaurus tangae and Guanlingsaurus liangae. They differ in the length of the snout, the number of the presacral vertebrae, vertebral proportions, the shape of the humerus and fibula, among other features. Paleontology SCI(E) 0 ARTICLE 3 588-597 26 Journal/Newspaper Spitzbergen Peking University Institutional Repository (PKU IR) |
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Peking University Institutional Repository (PKU IR) |
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English |
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SPITZBERGEN GUIZHOU GENUS |
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SPITZBERGEN GUIZHOU GENUS Maisch, Michael W. Pan, Xin-Ru Sun, Zuo-Yu Cai, Tao Zhang, Da-Peng Xie, Jia-Lin Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
topic_facet |
SPITZBERGEN GUIZHOU GENUS |
description |
The cranial osteology of the large ichthyosaur Guizhouichthyosaurus tangae from the Wayao Member of the Falang Formation (Lower Carnian, Upper Triassic) of Guizhou, southwest China, is described, based on a well preserved skull and mandible and additional specimens. It can be diagnosed by a suite of cranial characters that include premaxilla without well-developed processus subnarialis, maxilla reaches far anteriorly and has a very long processus postnarialis, orbit of characteristic shape with concave dorsal and straight posterior and ventral margins, small prefrontal that forms only the anterior third of the dorsal orbital margin, postfrontal meets the supratemporal externally, postorbital forms a large part of the lateral margin of the temporal fenestra internally, deep triangular incisura postjugalis, jugal fails to meet quadratojugal externally, short postorbital skull segment; frontals and parietals form sharp ridges lateral to the area of the foramen parietale; parietals form a low and narrow sagittal crest; teeth thecodontously implanted, blunt, conical and without carinae. New data on the postcranial skeleton are also provided. The available evidence indicates that Guizhouichthyosaurus is an advanced member of the Merriamosauria, but more plesiomorphic than the parvipelvians. The taxonomy of the large ichthyosaurs from the Falang Formation remains largely problematic. It appears probable that only two taxa are valid, Guizhouichthyosaurus tangae and Guanlingsaurus liangae. They differ in the length of the snout, the number of the presacral vertebrae, vertebral proportions, the shape of the humerus and fibula, among other features. Paleontology SCI(E) 0 ARTICLE 3 588-597 26 |
author2 |
Maisch, MW (reprint author), Univ Tubingen, Inst & Museum Geol & Palaontol, Sigwartstr 10, Tubingen, Germany. Univ Tubingen, Inst & Museum Geol & Palaontol, Tubingen, Germany. Peking Univ, Dept Geol, Beijing 100871, Peoples R China. Peking Univ, Geol Museum, Beijing 100871, Peoples R China. Guanling Natl Geopk Fossil Biota, Anshun City 561300, Guizhou, Peoples R China. Univ Tubingen, Inst & Museum Geol & Palaontol, Sigwartstr 10, Tubingen, Germany. |
format |
Journal/Newspaper |
author |
Maisch, Michael W. Pan, Xin-Ru Sun, Zuo-Yu Cai, Tao Zhang, Da-Peng Xie, Jia-Lin |
author_facet |
Maisch, Michael W. Pan, Xin-Ru Sun, Zuo-Yu Cai, Tao Zhang, Da-Peng Xie, Jia-Lin |
author_sort |
Maisch, Michael W. |
title |
Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
title_short |
Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
title_full |
Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
title_fullStr |
Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
title_full_unstemmed |
Cranial osteology of Guizhouichthyosaurus tangae (Reptilia : Ichthyosauria) from the Upper Triassic of China |
title_sort |
cranial osteology of guizhouichthyosaurus tangae (reptilia : ichthyosauria) from the upper triassic of china |
publisher |
journal of vertebrate paleontology |
publishDate |
2006 |
url |
https://hdl.handle.net/20.500.11897/251582 https://doi.org/10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 |
genre |
Spitzbergen |
genre_facet |
Spitzbergen |
op_source |
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op_relation |
JOURNAL OF VERTEBRATE PALEONTOLOGY.2006,26,(3),588-597. 976372 0272-4634 http://hdl.handle.net/20.500.11897/251582 doi:10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 WOS:000240609700011 |
op_doi |
https://doi.org/20.500.11897/251582 https://doi.org/10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2 |
_version_ |
1766209249563639808 |