<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand
- Autores
- Otero, Rodrigo A.; O'Gorman, José Patricio; Hiller, Norton; O'Keefe, F. Robin; Fordyce, R. Ewan
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A fragmentary plesiosaur skull from lower Maastrichtian levels of the Conway Formation, New Zealand, is redescribed. Originally regarded as pertaining to two separate individuals, we argue that they represent a single individual belonging to a new aristonectine elasmosaurid, Alexandronectes zealandiensis gen. et sp. nov. This new taxon has common morphologies with other aristonectines such as expansion of the pterygoids extending posteriorly beyond the occipital condyle (as observed in Ar. quiriquinensis and probably in Kaiwhekea katiki) and the presence of an ‘A’-shaped squamosal arch in dorsal view. Otherwise, it is distinguished from these latter species by having different paraoccipital processes, a different mandibular glenoid, and an adult skull comparatively smaller than K. katiki and Aristonectes spp. The new taxon is a morphologically intermediate form between the dorsoventrally high skull of K. katiki and the mediolaterally expanded skulls of Aristonectes spp. The studied specimen is the second genus and species and the third report of an aristonectine recovered from lower Maastrichtian beds of New Zealand, emphasizing the diversity of this group in New Zealand and also indicating that aristonectines could include smaller species than those already known.
Facultad de Ciencias Naturales y Museo - Materia
-
Ciencias Naturales
Plesiosaur skull
Alexandronectes zealandiensis
New Zealand - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/108315
Ver los metadatos del registro completo
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<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New ZealandOtero, Rodrigo A.O'Gorman, José PatricioHiller, NortonO'Keefe, F. RobinFordyce, R. EwanCiencias NaturalesPlesiosaur skullAlexandronectes zealandiensisNew ZealandA fragmentary plesiosaur skull from lower Maastrichtian levels of the Conway Formation, New Zealand, is redescribed. Originally regarded as pertaining to two separate individuals, we argue that they represent a single individual belonging to a new aristonectine elasmosaurid, <i>Alexandronectes zealandiensis</i> gen. et sp. nov. This new taxon has common morphologies with other aristonectines such as expansion of the pterygoids extending posteriorly beyond the occipital condyle (as observed in <i>Ar. quiriquinensis</i> and probably in<i> Kaiwhekea katiki</i>) and the presence of an ‘A’-shaped squamosal arch in dorsal view. Otherwise, it is distinguished from these latter species by having different paraoccipital processes, a different mandibular glenoid, and an adult skull comparatively smaller than <i>K. katiki</i> and <i>Aristonectes</i> spp. The new taxon is a morphologically intermediate form between the dorsoventrally high skull of <i>K. katiki</i> and the mediolaterally expanded skulls of <i>Aristonectes</i> spp. The studied specimen is the second genus and species and the third report of an aristonectine recovered from lower Maastrichtian beds of New Zealand, emphasizing the diversity of this group in New Zealand and also indicating that aristonectines could include smaller species than those already known.Facultad de Ciencias Naturales y Museo2016-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/108315enginfo:eu-repo/semantics/altIdentifier/issn/1937-2809info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2015.1054494info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:24:32Zoai:sedici.unlp.edu.ar:10915/108315Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:24:32.99SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
title |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
spellingShingle |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand Otero, Rodrigo A. Ciencias Naturales Plesiosaur skull Alexandronectes zealandiensis New Zealand |
title_short |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
title_full |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
title_fullStr |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
title_full_unstemmed |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
title_sort |
<i>Alexandronectes zealandiensisgen</i>. et sp. nov., a new aristonectine plesiosaur from the lower Maastrichtian of New Zealand |
dc.creator.none.fl_str_mv |
Otero, Rodrigo A. O'Gorman, José Patricio Hiller, Norton O'Keefe, F. Robin Fordyce, R. Ewan |
author |
Otero, Rodrigo A. |
author_facet |
Otero, Rodrigo A. O'Gorman, José Patricio Hiller, Norton O'Keefe, F. Robin Fordyce, R. Ewan |
author_role |
author |
author2 |
O'Gorman, José Patricio Hiller, Norton O'Keefe, F. Robin Fordyce, R. Ewan |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Ciencias Naturales Plesiosaur skull Alexandronectes zealandiensis New Zealand |
topic |
Ciencias Naturales Plesiosaur skull Alexandronectes zealandiensis New Zealand |
dc.description.none.fl_txt_mv |
A fragmentary plesiosaur skull from lower Maastrichtian levels of the Conway Formation, New Zealand, is redescribed. Originally regarded as pertaining to two separate individuals, we argue that they represent a single individual belonging to a new aristonectine elasmosaurid, <i>Alexandronectes zealandiensis</i> gen. et sp. nov. This new taxon has common morphologies with other aristonectines such as expansion of the pterygoids extending posteriorly beyond the occipital condyle (as observed in <i>Ar. quiriquinensis</i> and probably in<i> Kaiwhekea katiki</i>) and the presence of an ‘A’-shaped squamosal arch in dorsal view. Otherwise, it is distinguished from these latter species by having different paraoccipital processes, a different mandibular glenoid, and an adult skull comparatively smaller than <i>K. katiki</i> and <i>Aristonectes</i> spp. The new taxon is a morphologically intermediate form between the dorsoventrally high skull of <i>K. katiki</i> and the mediolaterally expanded skulls of <i>Aristonectes</i> spp. The studied specimen is the second genus and species and the third report of an aristonectine recovered from lower Maastrichtian beds of New Zealand, emphasizing the diversity of this group in New Zealand and also indicating that aristonectines could include smaller species than those already known. Facultad de Ciencias Naturales y Museo |
description |
A fragmentary plesiosaur skull from lower Maastrichtian levels of the Conway Formation, New Zealand, is redescribed. Originally regarded as pertaining to two separate individuals, we argue that they represent a single individual belonging to a new aristonectine elasmosaurid, <i>Alexandronectes zealandiensis</i> gen. et sp. nov. This new taxon has common morphologies with other aristonectines such as expansion of the pterygoids extending posteriorly beyond the occipital condyle (as observed in <i>Ar. quiriquinensis</i> and probably in<i> Kaiwhekea katiki</i>) and the presence of an ‘A’-shaped squamosal arch in dorsal view. Otherwise, it is distinguished from these latter species by having different paraoccipital processes, a different mandibular glenoid, and an adult skull comparatively smaller than <i>K. katiki</i> and <i>Aristonectes</i> spp. The new taxon is a morphologically intermediate form between the dorsoventrally high skull of <i>K. katiki</i> and the mediolaterally expanded skulls of <i>Aristonectes</i> spp. The studied specimen is the second genus and species and the third report of an aristonectine recovered from lower Maastrichtian beds of New Zealand, emphasizing the diversity of this group in New Zealand and also indicating that aristonectines could include smaller species than those already known. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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http://sedici.unlp.edu.ar/handle/10915/108315 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/1937-2809 info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2015.1054494 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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