Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina

Autores
Ortiz David, Leonardo Daniel; Kellner, Alexander Wilhelm Armin; Gonzalez Riga, Bernardo Javier
Año de publicación
2022
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The largest South American pterosaur, Thanatosdrakon amaru, represents an excellent case study to analyze theimportance of expanding phylogenetic matrices withappendicular characters. Several phylogenetic results recoverThanatosdrakon deeply nested in the Azhdarchidae clade, as itpresents numerous characters in the humeri that are decisive inachieving these results. However, Thanatosdrakon presentsunique characters that evidence a greater diversity in theclassic morphologies described for azhdarchids. The preservedaxial sequence shows a remarkable development of neuralarches and very reduced vertebral centers. This structure ismaintained from the posterior cervical vertebra to thedorsosacral vertebrae. The proximal syncarpal has amorphology similar to those described for azhdarchids,however, it presents a developed posterodistal process.Finally, the characteristics of the wing phalanges are singular,lacking the ventral ridge observed in many azhdarchids.Preliminary histological analyses indicate that the smallestspecimen (UNCUYO-LD 307) is a juvenile-subadult, andthese characteristics could be due, in part, to the ontogeneticstage of the specimen. In azhdarchids, the characters related tothe skull and middle cervical vertebrae are crucial forphylogenetic resolutions. Taxa lacking these structures areshown to be unstable in topologies. Detailed characterizationson other elements, such as the humerus, have partly solvedthese problems. However, there is a need to expand thenumber of characters in appendicular elements that wouldallow improved resolutions in less inclusive clades.
Fil: Ortiz David, Leonardo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; Argentina
Fil: Kellner, Alexander Wilhelm Armin. Universidade Federal do Rio de Janeiro; Brasil
Fil: Gonzalez Riga, Bernardo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; Argentina
82nd Annual meeting of the Society of Vertebrate Paleontology
Toronto
Canadá
Society of Vertebrate Paleontology
Materia
Pterosauria
Argentina
Thanatosdrakon amaru
Azhdarchidae
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/243101
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, ArgentinaOrtiz David, Leonardo DanielKellner, Alexander Wilhelm ArminGonzalez Riga, Bernardo JavierPterosauriaArgentinaThanatosdrakon amaruAzhdarchidaehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The largest South American pterosaur, Thanatosdrakon amaru, represents an excellent case study to analyze theimportance of expanding phylogenetic matrices withappendicular characters. Several phylogenetic results recoverThanatosdrakon deeply nested in the Azhdarchidae clade, as itpresents numerous characters in the humeri that are decisive inachieving these results. However, Thanatosdrakon presentsunique characters that evidence a greater diversity in theclassic morphologies described for azhdarchids. The preservedaxial sequence shows a remarkable development of neuralarches and very reduced vertebral centers. This structure ismaintained from the posterior cervical vertebra to thedorsosacral vertebrae. The proximal syncarpal has amorphology similar to those described for azhdarchids,however, it presents a developed posterodistal process.Finally, the characteristics of the wing phalanges are singular,lacking the ventral ridge observed in many azhdarchids.Preliminary histological analyses indicate that the smallestspecimen (UNCUYO-LD 307) is a juvenile-subadult, andthese characteristics could be due, in part, to the ontogeneticstage of the specimen. In azhdarchids, the characters related tothe skull and middle cervical vertebrae are crucial forphylogenetic resolutions. Taxa lacking these structures areshown to be unstable in topologies. Detailed characterizationson other elements, such as the humerus, have partly solvedthese problems. However, there is a need to expand thenumber of characters in appendicular elements that wouldallow improved resolutions in less inclusive clades.Fil: Ortiz David, Leonardo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; ArgentinaFil: Kellner, Alexander Wilhelm Armin. Universidade Federal do Rio de Janeiro; BrasilFil: Gonzalez Riga, Bernardo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; Argentina82nd Annual meeting of the Society of Vertebrate PaleontologyTorontoCanadáSociety of Vertebrate PaleontologySociety of Vertebrate Paleontology2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectEncuentroBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/243101Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina; 82nd Annual meeting of the Society of Vertebrate Paleontology; Toronto; Canadá; 2022; 121-121CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://vertpaleo.org/wp-content/uploads/2022/09/2022-SVP-Program-Abstract-Brochure_Preliminary.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T11:50:13Zoai:ri.conicet.gov.ar:11336/243101instacron: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 11:50:13.766CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
title Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
spellingShingle Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
Ortiz David, Leonardo Daniel
Pterosauria
Argentina
Thanatosdrakon amaru
Azhdarchidae
title_short Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
title_full Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
title_fullStr Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
title_full_unstemmed Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
title_sort Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina
dc.creator.none.fl_str_mv Ortiz David, Leonardo Daniel
Kellner, Alexander Wilhelm Armin
Gonzalez Riga, Bernardo Javier
author Ortiz David, Leonardo Daniel
author_facet Ortiz David, Leonardo Daniel
Kellner, Alexander Wilhelm Armin
Gonzalez Riga, Bernardo Javier
author_role author
author2 Kellner, Alexander Wilhelm Armin
Gonzalez Riga, Bernardo Javier
author2_role author
author
dc.subject.none.fl_str_mv Pterosauria
Argentina
Thanatosdrakon amaru
Azhdarchidae
topic Pterosauria
Argentina
Thanatosdrakon amaru
Azhdarchidae
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The largest South American pterosaur, Thanatosdrakon amaru, represents an excellent case study to analyze theimportance of expanding phylogenetic matrices withappendicular characters. Several phylogenetic results recoverThanatosdrakon deeply nested in the Azhdarchidae clade, as itpresents numerous characters in the humeri that are decisive inachieving these results. However, Thanatosdrakon presentsunique characters that evidence a greater diversity in theclassic morphologies described for azhdarchids. The preservedaxial sequence shows a remarkable development of neuralarches and very reduced vertebral centers. This structure ismaintained from the posterior cervical vertebra to thedorsosacral vertebrae. The proximal syncarpal has amorphology similar to those described for azhdarchids,however, it presents a developed posterodistal process.Finally, the characteristics of the wing phalanges are singular,lacking the ventral ridge observed in many azhdarchids.Preliminary histological analyses indicate that the smallestspecimen (UNCUYO-LD 307) is a juvenile-subadult, andthese characteristics could be due, in part, to the ontogeneticstage of the specimen. In azhdarchids, the characters related tothe skull and middle cervical vertebrae are crucial forphylogenetic resolutions. Taxa lacking these structures areshown to be unstable in topologies. Detailed characterizationson other elements, such as the humerus, have partly solvedthese problems. However, there is a need to expand thenumber of characters in appendicular elements that wouldallow improved resolutions in less inclusive clades.
Fil: Ortiz David, Leonardo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; Argentina
Fil: Kellner, Alexander Wilhelm Armin. Universidade Federal do Rio de Janeiro; Brasil
Fil: Gonzalez Riga, Bernardo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales. Laboratorio de Dinosaurios.; Argentina
82nd Annual meeting of the Society of Vertebrate Paleontology
Toronto
Canadá
Society of Vertebrate Paleontology
description The largest South American pterosaur, Thanatosdrakon amaru, represents an excellent case study to analyze theimportance of expanding phylogenetic matrices withappendicular characters. Several phylogenetic results recoverThanatosdrakon deeply nested in the Azhdarchidae clade, as itpresents numerous characters in the humeri that are decisive inachieving these results. However, Thanatosdrakon presentsunique characters that evidence a greater diversity in theclassic morphologies described for azhdarchids. The preservedaxial sequence shows a remarkable development of neuralarches and very reduced vertebral centers. This structure ismaintained from the posterior cervical vertebra to thedorsosacral vertebrae. The proximal syncarpal has amorphology similar to those described for azhdarchids,however, it presents a developed posterodistal process.Finally, the characteristics of the wing phalanges are singular,lacking the ventral ridge observed in many azhdarchids.Preliminary histological analyses indicate that the smallestspecimen (UNCUYO-LD 307) is a juvenile-subadult, andthese characteristics could be due, in part, to the ontogeneticstage of the specimen. In azhdarchids, the characters related tothe skull and middle cervical vertebrae are crucial forphylogenetic resolutions. Taxa lacking these structures areshown to be unstable in topologies. Detailed characterizationson other elements, such as the humerus, have partly solvedthese problems. However, there is a need to expand thenumber of characters in appendicular elements that wouldallow improved resolutions in less inclusive clades.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Encuentro
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/243101
Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina; 82nd Annual meeting of the Society of Vertebrate Paleontology; Toronto; Canadá; 2022; 121-121
CONICET Digital
CONICET
url http://hdl.handle.net/11336/243101
identifier_str_mv Anatomical peculiarities of the Giant Pterosaur Thanatosdrakon Amaru (Azhdarchidae, Pterodactyloidea) from upper cretaceous deposits of Mendoza, Argentina; 82nd Annual meeting of the Society of Vertebrate Paleontology; Toronto; Canadá; 2022; 121-121
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://vertpaleo.org/wp-content/uploads/2022/09/2022-SVP-Program-Abstract-Brochure_Preliminary.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Society of Vertebrate Paleontology
publisher.none.fl_str_mv Society of Vertebrate Paleontology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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