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

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: th...

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Autores principales: Sferco, Emilia, Lopez-Arbarello, Adriana
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Naturales
Paleontología
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/16965
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-16965
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleontología
spellingShingle Ciencias Naturales
Paleontología
Sferco, Emilia
Lopez-Arbarello, Adriana
Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
topic_facet Ciencias Naturales
Paleontología
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.
format Objeto de conferencia
Objeto de conferencia
author Sferco, Emilia
Lopez-Arbarello, Adriana
author_facet Sferco, Emilia
Lopez-Arbarello, Adriana
author_sort Sferco, Emilia
title Southern Gondwanan Late Jurassic continental teleosts (Actinopterygii, Teleostei): phylogeny and biogeography
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
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/16965
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