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 Slottsmøya Member Lagerstätte of Svalbard, Norway. One of th...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/418161/ |
id |
ftsouthampton:oai:eprints.soton.ac.uk:418161 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:418161 2023-07-30T04:07:11+02:00 A New Ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle Delsett, Lene Liebe Roberts, Aubrey J. Druckenmiller, Patrick S. Hurum, Jørn H. Wong, William Oki 2017-01-25 https://eprints.soton.ac.uk/418161/ English eng Delsett, Lene Liebe, Roberts, Aubrey J., Druckenmiller, Patrick S. and Hurum, Jørn H. , Wong, William Oki (ed.) (2017) A New Ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle. PLoS ONE, 12 (1). (doi:10.1371/journal.pone.0169971 <http://dx.doi.org/10.1371/journal.pone.0169971>). Article PeerReviewed 2017 ftsouthampton https://doi.org/10.1371/journal.pone.0169971 2023-07-09T22:20:47Z 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 Slottsmøya Member Lagerstätte 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 Slottsmøya 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 Slottsmøya 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 University of Southampton: e-Prints Soton Norway Slottsmøya ENVELOPE(17.415,17.415,78.046,78.046) Svalbard PLOS ONE 12 1 e0169971 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
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 Slottsmøya Member Lagerstätte 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 Slottsmøya 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 Slottsmøya 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. |
author2 |
Wong, William Oki |
format |
Article in Journal/Newspaper |
author |
Delsett, Lene Liebe Roberts, Aubrey J. Druckenmiller, Patrick S. Hurum, Jørn H. |
spellingShingle |
Delsett, Lene Liebe Roberts, Aubrey J. Druckenmiller, Patrick S. Hurum, Jørn H. A New Ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle |
author_facet |
Delsett, Lene Liebe Roberts, Aubrey J. Druckenmiller, Patrick S. Hurum, Jørn H. |
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 |
publishDate |
2017 |
url |
https://eprints.soton.ac.uk/418161/ |
long_lat |
ENVELOPE(17.415,17.415,78.046,78.046) |
geographic |
Norway Slottsmøya Svalbard |
geographic_facet |
Norway Slottsmøya Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
Delsett, Lene Liebe, Roberts, Aubrey J., Druckenmiller, Patrick S. and Hurum, Jørn H. , Wong, William Oki (ed.) (2017) A New Ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle. PLoS ONE, 12 (1). (doi:10.1371/journal.pone.0169971 <http://dx.doi.org/10.1371/journal.pone.0169971>). |
op_doi |
https://doi.org/10.1371/journal.pone.0169971 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
1 |
container_start_page |
e0169971 |
_version_ |
1772820338774638592 |