A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada
Mosasaurs assigned to the genus Tylosaurus have been reported from the North Atlantic Circle Basin, including the Western Interior Seaway in North America and Europe, from the Turonian of Chihuahua, Mexico, to the early Maastrichtian of Belgium. The youngest record of Tylosaurus in North America is...
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ftdatacite:10.6084/m9.figshare.6300104 2023-05-15T17:35:36+02:00 A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada Jiménez-Huidobro, Paulina Caldwell, Michael W. Paparella, Ilaria Bullard, Timon S. 2018 https://dx.doi.org/10.6084/m9.figshare.6300104 https://tandf.figshare.com/articles/A_new_species_of_tylosaurine_mosasaur_from_the_upper_Campanian_Bearpaw_Formation_of_Saskatchewan_Canada/6300104 unknown Taylor & Francis https://dx.doi.org/10.1080/14772019.2018.1471744 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Genetics FOS Biological sciences Molecular Biology Evolutionary Biology Ecology 69999 Biological Sciences not elsewhere classified Marine Biology dataset Dataset 2018 ftdatacite https://doi.org/10.6084/m9.figshare.6300104 https://doi.org/10.1080/14772019.2018.1471744 2021-11-05T12:55:41Z Mosasaurs assigned to the genus Tylosaurus have been reported from the North Atlantic Circle Basin, including the Western Interior Seaway in North America and Europe, from the Turonian of Chihuahua, Mexico, to the early Maastrichtian of Belgium. The youngest record of Tylosaurus in North America is from the middle Campanian of the Pierre Shale, South Dakota. Data obtained by examination of an almost complete skull and associated postcranial elements of a large tylosaurine mosasaur from the upper Campanian of Saskatchewan supports the recognition of this specimen as a new species, Tylosaurus saskatchewanensis sp. nov. The specimen, collected from the Bearpaw Formation, southern Saskatchewan, Canada, presents unique features and combinations of features. It is recognized as a tylosaurine based on: edentulous rostrum; relatively long suprastapedial process of quadrate not reaching infrastapedial process; predental anterior extension of dentaries; and 12–13 maxillary and dentary teeth. Some of the characters that support recognition of the new species include: exclusion of prefrontal from dorsal rim of orbit by anterior process of postorbitofrontal; frontal extends anteriorly well into narial openings; well developed dorsal midline eminence of frontal; straight margins of parietal table; small infrastapedial process of quadrate located high on quadrate shaft almost touching suprastapedial process; thick tympanic ala of quadrate; 55 vertebrae anterior to chevron-bearing caudals; and rounded astragalus with big semicircular crural emargination. The new species represents the most northern occurrence of the genus and the subfamily and extends the stratigraphical distribution of the genus Tylosaurus in North America, occupying the northern Western Interior Seaway during the late Campanian. http://zoobank.org/urn:lsid:zoobank.org:pub:55338D44-B3C7-4F9C-8B51-C29DB9B99364 Dataset North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Canada |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Genetics FOS Biological sciences Molecular Biology Evolutionary Biology Ecology 69999 Biological Sciences not elsewhere classified Marine Biology |
spellingShingle |
Genetics FOS Biological sciences Molecular Biology Evolutionary Biology Ecology 69999 Biological Sciences not elsewhere classified Marine Biology Jiménez-Huidobro, Paulina Caldwell, Michael W. Paparella, Ilaria Bullard, Timon S. A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
topic_facet |
Genetics FOS Biological sciences Molecular Biology Evolutionary Biology Ecology 69999 Biological Sciences not elsewhere classified Marine Biology |
description |
Mosasaurs assigned to the genus Tylosaurus have been reported from the North Atlantic Circle Basin, including the Western Interior Seaway in North America and Europe, from the Turonian of Chihuahua, Mexico, to the early Maastrichtian of Belgium. The youngest record of Tylosaurus in North America is from the middle Campanian of the Pierre Shale, South Dakota. Data obtained by examination of an almost complete skull and associated postcranial elements of a large tylosaurine mosasaur from the upper Campanian of Saskatchewan supports the recognition of this specimen as a new species, Tylosaurus saskatchewanensis sp. nov. The specimen, collected from the Bearpaw Formation, southern Saskatchewan, Canada, presents unique features and combinations of features. It is recognized as a tylosaurine based on: edentulous rostrum; relatively long suprastapedial process of quadrate not reaching infrastapedial process; predental anterior extension of dentaries; and 12–13 maxillary and dentary teeth. Some of the characters that support recognition of the new species include: exclusion of prefrontal from dorsal rim of orbit by anterior process of postorbitofrontal; frontal extends anteriorly well into narial openings; well developed dorsal midline eminence of frontal; straight margins of parietal table; small infrastapedial process of quadrate located high on quadrate shaft almost touching suprastapedial process; thick tympanic ala of quadrate; 55 vertebrae anterior to chevron-bearing caudals; and rounded astragalus with big semicircular crural emargination. The new species represents the most northern occurrence of the genus and the subfamily and extends the stratigraphical distribution of the genus Tylosaurus in North America, occupying the northern Western Interior Seaway during the late Campanian. http://zoobank.org/urn:lsid:zoobank.org:pub:55338D44-B3C7-4F9C-8B51-C29DB9B99364 |
format |
Dataset |
author |
Jiménez-Huidobro, Paulina Caldwell, Michael W. Paparella, Ilaria Bullard, Timon S. |
author_facet |
Jiménez-Huidobro, Paulina Caldwell, Michael W. Paparella, Ilaria Bullard, Timon S. |
author_sort |
Jiménez-Huidobro, Paulina |
title |
A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
title_short |
A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
title_full |
A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
title_fullStr |
A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
title_full_unstemmed |
A new species of tylosaurine mosasaur from the upper Campanian Bearpaw Formation of Saskatchewan, Canada |
title_sort |
new species of tylosaurine mosasaur from the upper campanian bearpaw formation of saskatchewan, canada |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.6300104 https://tandf.figshare.com/articles/A_new_species_of_tylosaurine_mosasaur_from_the_upper_Campanian_Bearpaw_Formation_of_Saskatchewan_Canada/6300104 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1080/14772019.2018.1471744 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.6300104 https://doi.org/10.1080/14772019.2018.1471744 |
_version_ |
1766134803901448192 |