Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography

Autores
Sferco, E.; Lopez Arbarello, A.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
During the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three continental fish faunas of Late Jurassic age are known worldwide: the Almada Fauna from the Cañadón Calcáreo Formation in central Chubut, Argentina, the Talbragar Fauna from the Australian Talbragar Beds and the fish assemblages from the Morrison Formation in USA. The Almada and Talbragar faunas show strong similarities. Regarding their taxonomic composition, both faunas share one genus of coccolepid and the presence of halecomorphs and basal teleosts. Concerning their geological settings and taphonomic background, each fauna occur in a single horizon within the stratigraphic column, representing mass mortality events, probably related to volcanic activity. To date, the Almada Fauna includes two species of teleosts: "Tharrias" feruglioi (Bordas) and Luisiella inexcutata Bocchino. Interestingly, "T". feruglioi shares very similar morphological features with Cavenderichthys talbragarensis (Woodward), the only valid species of teleost from Talbragar. A previous phylogenetic analysis showed a sister group relationship between these two species. Strengthening the resemblance between the Almada and Talbragar faunas, this result suggested close biogeographic relationships between the Argentinean and Australian localities. Here we present a new phylogenetic analysis including other taxa of fresh-water teleosts and new characters, the results of which support this hypothesis of close biogeographic connection.
Sesiones libres
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Paleontología
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/16965
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spelling Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeographySferco, E.Lopez Arbarello, A.Ciencias NaturalesPaleontologíaDuring the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three continental fish faunas of Late Jurassic age are known worldwide: the Almada Fauna from the Cañadón Calcáreo Formation in central Chubut, Argentina, the Talbragar Fauna from the Australian Talbragar Beds and the fish assemblages from the Morrison Formation in USA. The Almada and Talbragar faunas show strong similarities. Regarding their taxonomic composition, both faunas share one genus of coccolepid and the presence of halecomorphs and basal teleosts. Concerning their geological settings and taphonomic background, each fauna occur in a single horizon within the stratigraphic column, representing mass mortality events, probably related to volcanic activity. To date, the Almada Fauna includes two species of teleosts: "Tharrias" feruglioi (Bordas) and Luisiella inexcutata Bocchino. Interestingly, "T". feruglioi shares very similar morphological features with Cavenderichthys talbragarensis (Woodward), the only valid species of teleost from Talbragar. A previous phylogenetic analysis showed a sister group relationship between these two species. Strengthening the resemblance between the Almada and Talbragar faunas, this result suggested close biogeographic relationships between the Argentinean and Australian localities. Here we present a new phylogenetic analysis including other taxa of fresh-water teleosts and new characters, the results of which support this hypothesis of close biogeographic connection.Sesiones libresFacultad de Ciencias Naturales y Museo2010info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionResumenhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/16965enginfo:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/25738info: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:UNLP2025-10-22T16:34:40Zoai:sedici.unlp.edu.ar:10915/16965Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:34:40.296SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
title Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
spellingShingle Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
Sferco, E.
Ciencias Naturales
Paleontología
title_short Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
title_full Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
title_fullStr Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
title_full_unstemmed Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
title_sort Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
dc.creator.none.fl_str_mv Sferco, E.
Lopez Arbarello, A.
author Sferco, E.
author_facet Sferco, E.
Lopez Arbarello, A.
author_role author
author2 Lopez Arbarello, A.
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Paleontología
topic Ciencias Naturales
Paleontología
dc.description.none.fl_txt_mv During the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three continental fish faunas of Late Jurassic age are known worldwide: the Almada Fauna from the Cañadón Calcáreo Formation in central Chubut, Argentina, the Talbragar Fauna from the Australian Talbragar Beds and the fish assemblages from the Morrison Formation in USA. The Almada and Talbragar faunas show strong similarities. Regarding their taxonomic composition, both faunas share one genus of coccolepid and the presence of halecomorphs and basal teleosts. Concerning their geological settings and taphonomic background, each fauna occur in a single horizon within the stratigraphic column, representing mass mortality events, probably related to volcanic activity. To date, the Almada Fauna includes two species of teleosts: "Tharrias" feruglioi (Bordas) and Luisiella inexcutata Bocchino. Interestingly, "T". feruglioi shares very similar morphological features with Cavenderichthys talbragarensis (Woodward), the only valid species of teleost from Talbragar. A previous phylogenetic analysis showed a sister group relationship between these two species. Strengthening the resemblance between the Almada and Talbragar faunas, this result suggested close biogeographic relationships between the Argentinean and Australian localities. Here we present a new phylogenetic analysis including other taxa of fresh-water teleosts and new characters, the results of which support this hypothesis of close biogeographic connection.
Sesiones libres
Facultad de Ciencias Naturales y Museo
description During the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three continental fish faunas of Late Jurassic age are known worldwide: the Almada Fauna from the Cañadón Calcáreo Formation in central Chubut, Argentina, the Talbragar Fauna from the Australian Talbragar Beds and the fish assemblages from the Morrison Formation in USA. The Almada and Talbragar faunas show strong similarities. Regarding their taxonomic composition, both faunas share one genus of coccolepid and the presence of halecomorphs and basal teleosts. Concerning their geological settings and taphonomic background, each fauna occur in a single horizon within the stratigraphic column, representing mass mortality events, probably related to volcanic activity. To date, the Almada Fauna includes two species of teleosts: "Tharrias" feruglioi (Bordas) and Luisiella inexcutata Bocchino. Interestingly, "T". feruglioi shares very similar morphological features with Cavenderichthys talbragarensis (Woodward), the only valid species of teleost from Talbragar. A previous phylogenetic analysis showed a sister group relationship between these two species. Strengthening the resemblance between the Almada and Talbragar faunas, this result suggested close biogeographic relationships between the Argentinean and Australian localities. Here we present a new phylogenetic analysis including other taxa of fresh-water teleosts and new characters, the results of which support this hypothesis of close biogeographic connection.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/16965
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dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2
info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/25738
dc.rights.none.fl_str_mv 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)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
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