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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ftopenresearchl:oai:biblioboard.com:a553c104-a7fb-44d8-81c7-efc6b0c5d203 2024-09-15T18:38:20+00:00 A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle Delsett, Lene Liebe Roberts, Aubrey J. 2017-01-01T00:00:00Z application/pdf https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://doi.org/10.1371/journal.pone.0169971 English eng Public Library of Science (PLOS) https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf doi:https://doi.org/10.1371/journal.pone.0169971 https://creativecommons.org/licenses/by/4.0/legalcode MODID-55c385867f4:Public Library of Science (PLOS) ARTICLE 2017 ftopenresearchl https://doi.org/10.1371/journal.pone.0169971 2024-08-26T09:50:50Z 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 Open Research Library PLOS ONE 12 1 e0169971 |
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English |
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. |
spellingShingle |
Delsett, Lene Liebe Roberts, Aubrey J. A New Ophthalmosaurid (Ichthyosauria) From Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
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://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf https://doi.org/10.1371/journal.pone.0169971 |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
MODID-55c385867f4:Public Library of Science (PLOS) |
op_relation |
https://openresearchlibrary.org/viewer/a553c104-a7fb-44d8-81c7-efc6b0c5d203 https://openresearchlibrary.org/ext/api/media/a553c104-a7fb-44d8-81c7-efc6b0c5d203/assets/external_content.pdf doi:https://doi.org/10.1371/journal.pone.0169971 |
op_rights |
https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1371/journal.pone.0169971 |
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PLOS ONE |
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12 |
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1 |
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e0169971 |
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1810482715615559680 |