A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle
In spite of a fossil record spanning over 150 million years, pelvic girdle evolution in Ichthyopterygia is poorly known. Here, we examine pelvic girdle size relationships using quantitative methods and new ophthalmosaurid material from the Slottsm Member Lagerst of Svalbard, Norway. One of these new...
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fttriple:oai:gotriple.eu:10670/1.g9zgkg 2023-05-15T18:29:42+02:00 A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle Delsett, Lene Liebe Roberts, Aubrey J. 2017-01-01 https://doi.org/10.1371/journal.pone.0169971 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 en eng Public Library of Science (PLOS) doi:https://doi.org/10.1371/journal.pone.0169971 10670/1.g9zgkg https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 lic_creative-commons Open Research Library archeo geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.1371/journal.pone.0169971 2023-01-22T17:57:35Z In spite of a fossil record spanning over 150 million years, pelvic girdle evolution in Ichthyopterygia is poorly known. Here, we examine pelvic girdle size relationships using quantitative methods and new ophthalmosaurid material from the Slottsm Member Lagerst of Svalbard, Norway. One of these new specimens, which preserves the most complete ichthyosaur pelvic girdle from the Cretaceous, is described herein as a new taxon, Keilhauia nui gen. et sp. nov. It represents the most complete Berriasian ichthyosaur known and the youngest yet described from the Slottsmà Member. It is diagnosed on the basis of two autapomorphies from the pelvic girdle, including an ilium that is anteroposteriorly expanded at its dorsal end and an ischiopubis that is shorter or subequal in length to the femur, as well as a unique character combination. The Slottsm Member Lagerstätte ichthyosaurs are significant in that they represent a diverse assemblage of ophthalmosaurids that existed immediately preceding and across the Jurassic Cretaceous boundary. They also exhibit considerable variation in pelvic girdle morphology, and expand the known range in size variation of pelvic girdle elements in the clade. Article in Journal/Newspaper Svalbard Unknown Norway Svalbard PLOS ONE 12 1 e0169971 |
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English |
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archeo geo |
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archeo geo Delsett, Lene Liebe Roberts, Aubrey J. A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
topic_facet |
archeo geo |
description |
In spite of a fossil record spanning over 150 million years, pelvic girdle evolution in Ichthyopterygia is poorly known. Here, we examine pelvic girdle size relationships using quantitative methods and new ophthalmosaurid material from the Slottsm Member Lagerst of Svalbard, Norway. One of these new specimens, which preserves the most complete ichthyosaur pelvic girdle from the Cretaceous, is described herein as a new taxon, Keilhauia nui gen. et sp. nov. It represents the most complete Berriasian ichthyosaur known and the youngest yet described from the Slottsmà Member. It is diagnosed on the basis of two autapomorphies from the pelvic girdle, including an ilium that is anteroposteriorly expanded at its dorsal end and an ischiopubis that is shorter or subequal in length to the femur, as well as a unique character combination. The Slottsm Member Lagerstätte ichthyosaurs are significant in that they represent a diverse assemblage of ophthalmosaurids that existed immediately preceding and across the Jurassic Cretaceous boundary. They also exhibit considerable variation in pelvic girdle morphology, and expand the known range in size variation of pelvic girdle elements in the clade. |
format |
Article in Journal/Newspaper |
author |
Delsett, Lene Liebe Roberts, Aubrey J. |
author_facet |
Delsett, Lene Liebe Roberts, Aubrey J. |
author_sort |
Delsett, Lene Liebe |
title |
A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
title_short |
A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
title_full |
A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
title_fullStr |
A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
title_full_unstemmed |
A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
title_sort |
new ophthalmosaurid (ichthyosauria) from svalbard, norway, and evolution of the ichthyopterygian pelvic girdle |
publisher |
Public Library of Science (PLOS) |
publishDate |
2017 |
url |
https://doi.org/10.1371/journal.pone.0169971 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Open Research Library |
op_relation |
doi:https://doi.org/10.1371/journal.pone.0169971 10670/1.g9zgkg https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.1371/journal.pone.0169971 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
1 |
container_start_page |
e0169971 |
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