Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales

Autores
Spiekman, Stephan N. F.; Ezcurra, Martin Daniel; Butler, Richard J.; Fraser, Nicholas C.; Maidment, Susannah C. R.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We describe a new small-bodied coelophysoid theropod dinosaur, Pendraig milnerae gen. et sp. nov, from the Late Triassic fissure fill deposits of Pant-y-ffynnon in southern Wales. The species is represented by the holotype, consisting of an articulated pelvic girdle, sacrum and posterior dorsal vertebrae, and an associated left femur, and by two referred specimens, comprising an isolated dorsal vertebra and a partial left ischium. Our phylogenetic analysis recovers P. milnerae as a non-coelophysid coelophysoid theropod, representing the first-named unambiguous theropod from the Triassic of the UK. Recently, it has been suggested that Pant-y-ffynnon and other nearby Late Triassic to Early Jurassic fissure fill faunas might have been subjected to insular dwarfism. To test this hypothesis for P. milnerae, we performed an ancestral state reconstruction analysis of body size in early neotheropods. Although our results indicate that a reduced body size is autapomorphic for P. milnerae, some other coelophysoid taxa show a similar size reduction, and there is, therefore, ambiguous evidence to indicate that this species was subjected to dwarfism. Our analyses further indicate that, in contrast with averostran-line neotheropods, which increased in body size during the Triassic, coelophysoids underwent a small body size decrease early in their evolution.
Fil: Spiekman, Stephan N. F.. University of Birmingham; Reino Unido. Natural History Museum; Reino Unido
Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Butler, Richard J.. University of Birmingham; Reino Unido
Fil: Fraser, Nicholas C.. National Museums of Scotland; Reino Unido
Fil: Maidment, Susannah C. R.. University of Birmingham; Reino Unido. Natural History Museum; Reino Unido
Materia
BODY SIZE EVOLUTION
COELOPHYSOIDEA
OSTEOLOGY
PENDRAIG
THEROPODA
TRIASSIC
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/168965
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/168965
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of WalesSpiekman, Stephan N. F.Ezcurra, Martin DanielButler, Richard J.Fraser, Nicholas C.Maidment, Susannah C. R.BODY SIZE EVOLUTIONCOELOPHYSOIDEAOSTEOLOGYPENDRAIGTHEROPODATRIASSIChttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We describe a new small-bodied coelophysoid theropod dinosaur, Pendraig milnerae gen. et sp. nov, from the Late Triassic fissure fill deposits of Pant-y-ffynnon in southern Wales. The species is represented by the holotype, consisting of an articulated pelvic girdle, sacrum and posterior dorsal vertebrae, and an associated left femur, and by two referred specimens, comprising an isolated dorsal vertebra and a partial left ischium. Our phylogenetic analysis recovers P. milnerae as a non-coelophysid coelophysoid theropod, representing the first-named unambiguous theropod from the Triassic of the UK. Recently, it has been suggested that Pant-y-ffynnon and other nearby Late Triassic to Early Jurassic fissure fill faunas might have been subjected to insular dwarfism. To test this hypothesis for P. milnerae, we performed an ancestral state reconstruction analysis of body size in early neotheropods. Although our results indicate that a reduced body size is autapomorphic for P. milnerae, some other coelophysoid taxa show a similar size reduction, and there is, therefore, ambiguous evidence to indicate that this species was subjected to dwarfism. Our analyses further indicate that, in contrast with averostran-line neotheropods, which increased in body size during the Triassic, coelophysoids underwent a small body size decrease early in their evolution.Fil: Spiekman, Stephan N. F.. University of Birmingham; Reino Unido. Natural History Museum; Reino UnidoFil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Butler, Richard J.. University of Birmingham; Reino UnidoFil: Fraser, Nicholas C.. National Museums of Scotland; Reino UnidoFil: Maidment, Susannah C. R.. University of Birmingham; Reino Unido. Natural History Museum; Reino UnidoThe Royal Society2021-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/168965Spiekman, Stephan N. F.; Ezcurra, Martin Daniel; Butler, Richard J.; Fraser, Nicholas C.; Maidment, Susannah C. R.; Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales; The Royal Society; Royal Society Open Science; 8; 10; 10-2021; 1-272054-5703CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1098/rsos.210915info:eu-repo/semantics/altIdentifier/url/https://royalsocietypublishing.org/doi/10.1098/rsos.210915info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T11:15:11Zoai:ri.conicet.gov.ar:11336/168965instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-17 11:15:11.917CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
title Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
spellingShingle Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
Spiekman, Stephan N. F.
BODY SIZE EVOLUTION
COELOPHYSOIDEA
OSTEOLOGY
PENDRAIG
THEROPODA
TRIASSIC
title_short Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
title_full Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
title_fullStr Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
title_full_unstemmed Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
title_sort Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
dc.creator.none.fl_str_mv Spiekman, Stephan N. F.
Ezcurra, Martin Daniel
Butler, Richard J.
Fraser, Nicholas C.
Maidment, Susannah C. R.
author Spiekman, Stephan N. F.
author_facet Spiekman, Stephan N. F.
Ezcurra, Martin Daniel
Butler, Richard J.
Fraser, Nicholas C.
Maidment, Susannah C. R.
author_role author
author2 Ezcurra, Martin Daniel
Butler, Richard J.
Fraser, Nicholas C.
Maidment, Susannah C. R.
author2_role author
author
author
author
dc.subject.none.fl_str_mv BODY SIZE EVOLUTION
COELOPHYSOIDEA
OSTEOLOGY
PENDRAIG
THEROPODA
TRIASSIC
topic BODY SIZE EVOLUTION
COELOPHYSOIDEA
OSTEOLOGY
PENDRAIG
THEROPODA
TRIASSIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We describe a new small-bodied coelophysoid theropod dinosaur, Pendraig milnerae gen. et sp. nov, from the Late Triassic fissure fill deposits of Pant-y-ffynnon in southern Wales. The species is represented by the holotype, consisting of an articulated pelvic girdle, sacrum and posterior dorsal vertebrae, and an associated left femur, and by two referred specimens, comprising an isolated dorsal vertebra and a partial left ischium. Our phylogenetic analysis recovers P. milnerae as a non-coelophysid coelophysoid theropod, representing the first-named unambiguous theropod from the Triassic of the UK. Recently, it has been suggested that Pant-y-ffynnon and other nearby Late Triassic to Early Jurassic fissure fill faunas might have been subjected to insular dwarfism. To test this hypothesis for P. milnerae, we performed an ancestral state reconstruction analysis of body size in early neotheropods. Although our results indicate that a reduced body size is autapomorphic for P. milnerae, some other coelophysoid taxa show a similar size reduction, and there is, therefore, ambiguous evidence to indicate that this species was subjected to dwarfism. Our analyses further indicate that, in contrast with averostran-line neotheropods, which increased in body size during the Triassic, coelophysoids underwent a small body size decrease early in their evolution.
Fil: Spiekman, Stephan N. F.. University of Birmingham; Reino Unido. Natural History Museum; Reino Unido
Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Butler, Richard J.. University of Birmingham; Reino Unido
Fil: Fraser, Nicholas C.. National Museums of Scotland; Reino Unido
Fil: Maidment, Susannah C. R.. University of Birmingham; Reino Unido. Natural History Museum; Reino Unido
description We describe a new small-bodied coelophysoid theropod dinosaur, Pendraig milnerae gen. et sp. nov, from the Late Triassic fissure fill deposits of Pant-y-ffynnon in southern Wales. The species is represented by the holotype, consisting of an articulated pelvic girdle, sacrum and posterior dorsal vertebrae, and an associated left femur, and by two referred specimens, comprising an isolated dorsal vertebra and a partial left ischium. Our phylogenetic analysis recovers P. milnerae as a non-coelophysid coelophysoid theropod, representing the first-named unambiguous theropod from the Triassic of the UK. Recently, it has been suggested that Pant-y-ffynnon and other nearby Late Triassic to Early Jurassic fissure fill faunas might have been subjected to insular dwarfism. To test this hypothesis for P. milnerae, we performed an ancestral state reconstruction analysis of body size in early neotheropods. Although our results indicate that a reduced body size is autapomorphic for P. milnerae, some other coelophysoid taxa show a similar size reduction, and there is, therefore, ambiguous evidence to indicate that this species was subjected to dwarfism. Our analyses further indicate that, in contrast with averostran-line neotheropods, which increased in body size during the Triassic, coelophysoids underwent a small body size decrease early in their evolution.
publishDate 2021
dc.date.none.fl_str_mv 2021-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/168965
Spiekman, Stephan N. F.; Ezcurra, Martin Daniel; Butler, Richard J.; Fraser, Nicholas C.; Maidment, Susannah C. R.; Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales; The Royal Society; Royal Society Open Science; 8; 10; 10-2021; 1-27
2054-5703
CONICET Digital
CONICET
url http://hdl.handle.net/11336/168965
identifier_str_mv Spiekman, Stephan N. F.; Ezcurra, Martin Daniel; Butler, Richard J.; Fraser, Nicholas C.; Maidment, Susannah C. R.; Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales; The Royal Society; Royal Society Open Science; 8; 10; 10-2021; 1-27
2054-5703
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1098/rsos.210915
info:eu-repo/semantics/altIdentifier/url/https://royalsocietypublishing.org/doi/10.1098/rsos.210915
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv The Royal Society
publisher.none.fl_str_mv The Royal Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.001348

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