Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae
A new elasmosaurid, Vegasaurus molyi, gen. et sp. nov., from Vega Island, James Ross Archipelago, Antarctica, is described. The holotype and only specimen of this species (MLP 93-I-5-1) was collected from the lower Maastrichtian Cape Lamb Member of the Snow Hill Island Formation. Vegasaurus molyi is...
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ftbioone:10.1080/02724634.2014.931285 2024-06-02T07:58:09+00:00 Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi world 2015-05-01 text/HTML https://doi.org/10.1080/02724634.2014.931285 en eng The Society of Vertebrate Paleontology doi:10.1080/02724634.2014.931285 All rights reserved. https://doi.org/10.1080/02724634.2014.931285 Text 2015 ftbioone https://doi.org/10.1080/02724634.2014.931285 2024-05-07T00:50:56Z A new elasmosaurid, Vegasaurus molyi, gen. et sp. nov., from Vega Island, James Ross Archipelago, Antarctica, is described. The holotype and only specimen of this species (MLP 93-I-5-1) was collected from the lower Maastrichtian Cape Lamb Member of the Snow Hill Island Formation. Vegasaurus molyi is the only Antarctic elasmosaurid and one of only a few Late Cretaceous elasmosaurids from the Southern Hemisphere whose postcranial anatomy is well known. Vegasaurus molyi is distinguished from other elasmosaurids by the following combination of characters: cervical region with 54 vertebrae with elongated centra, dumbbell-shaped articular faces and lateral ridge present in the anterior and middle parts of the neck but absent in the posterior-most cervical vertebrae; scapula with ventral ramus bearing a strong ridge in the anteromedial corner of its dorsal surface; ilium shaft with expanded distal end, divided into two parts forming an angle of 140° opening anteriorly; and humerus with anterior knee and prominent posterior projection with accessory posterior articular facet. Preliminary phylogenetic analysis places V. molyi within a clade that includes the Late Cretaceous Wedellian aristonectine elasmosaurids, Aristonectes and Kaiwhekea. This indicates a close relationship between Aristonectinae and non-Aristonectinae Late Cretaceous Weddellian elasmosaurids and suggests a Weddellian origin for the Aristonectinae. Text Antarc* Antarctic Antarctica Ross Archipelago Snow Hill Island Vega Island BioOne Online Journals Antarctic Vega Island ENVELOPE(-57.500,-57.500,-63.833,-63.833) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) Cape Lamb ENVELOPE(-57.621,-57.621,-63.909,-63.909) Ross Archipelago ENVELOPE(167.000,167.000,-77.500,-77.500) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Journal of Vertebrate Paleontology 35 3 e931285 |
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Open Polar |
collection |
BioOne Online Journals |
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ftbioone |
language |
English |
description |
A new elasmosaurid, Vegasaurus molyi, gen. et sp. nov., from Vega Island, James Ross Archipelago, Antarctica, is described. The holotype and only specimen of this species (MLP 93-I-5-1) was collected from the lower Maastrichtian Cape Lamb Member of the Snow Hill Island Formation. Vegasaurus molyi is the only Antarctic elasmosaurid and one of only a few Late Cretaceous elasmosaurids from the Southern Hemisphere whose postcranial anatomy is well known. Vegasaurus molyi is distinguished from other elasmosaurids by the following combination of characters: cervical region with 54 vertebrae with elongated centra, dumbbell-shaped articular faces and lateral ridge present in the anterior and middle parts of the neck but absent in the posterior-most cervical vertebrae; scapula with ventral ramus bearing a strong ridge in the anteromedial corner of its dorsal surface; ilium shaft with expanded distal end, divided into two parts forming an angle of 140° opening anteriorly; and humerus with anterior knee and prominent posterior projection with accessory posterior articular facet. Preliminary phylogenetic analysis places V. molyi within a clade that includes the Late Cretaceous Wedellian aristonectine elasmosaurids, Aristonectes and Kaiwhekea. This indicates a close relationship between Aristonectinae and non-Aristonectinae Late Cretaceous Weddellian elasmosaurids and suggests a Weddellian origin for the Aristonectinae. |
author2 |
José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi |
format |
Text |
author |
José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi |
spellingShingle |
José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
author_facet |
José P. O'Gorman Leonardo Salgado Eduardo B. Olivero Sergio A. Marenssi |
author_sort |
José P. O'Gorman |
title |
Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
title_short |
Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
title_full |
Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
title_fullStr |
Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
title_full_unstemmed |
Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae |
title_sort |
vegasaurus molyi, gen. et sp. nov. (plesiosauria, elasmosauridae), from the cape lamb member (lower maastrichtian) of the snow hill island formation, vega island, antarctica, and remarks on wedellian elasmosauridae |
publisher |
The Society of Vertebrate Paleontology |
publishDate |
2015 |
url |
https://doi.org/10.1080/02724634.2014.931285 |
op_coverage |
world |
long_lat |
ENVELOPE(-57.500,-57.500,-63.833,-63.833) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-57.621,-57.621,-63.909,-63.909) ENVELOPE(167.000,167.000,-77.500,-77.500) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic Vega Island Hill Island Snow Hill Island Cape Lamb Ross Archipelago Snow Hill |
geographic_facet |
Antarctic Vega Island Hill Island Snow Hill Island Cape Lamb Ross Archipelago Snow Hill |
genre |
Antarc* Antarctic Antarctica Ross Archipelago Snow Hill Island Vega Island |
genre_facet |
Antarc* Antarctic Antarctica Ross Archipelago Snow Hill Island Vega Island |
op_source |
https://doi.org/10.1080/02724634.2014.931285 |
op_relation |
doi:10.1080/02724634.2014.931285 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/02724634.2014.931285 |
container_title |
Journal of Vertebrate Paleontology |
container_volume |
35 |
container_issue |
3 |
container_start_page |
e931285 |
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1800741421412515840 |