Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia

The teleosts of the Late Jurassic Almada Fauna (Cañadón Calcáreo Formation) from Patagonia have been known for decades, but their taxonomic assignment has remained problematic. Two teleost species were thought to be represented in these lacustrine deposits: †Tharrhias feruglioi and †Luisiella inexcu...

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Autores principales: Sferco, E., López-Arbarello, A., María Báez, A.
Formato: JOUR
Materias:
anatomy
Jurassic
morphology
taxonomy
teleost
Patagonia
Actinopterygii
Teleostei
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02724634_v35_n3_p_Sferco
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_02724634_v35_n3_p_Sferco2023-10-03T15:15:11Z Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia Sferco, E. López-Arbarello, A. María Báez, A. anatomy Jurassic morphology taxonomy teleost Patagonia Actinopterygii Teleostei The teleosts of the Late Jurassic Almada Fauna (Cañadón Calcáreo Formation) from Patagonia have been known for decades, but their taxonomic assignment has remained problematic. Two teleost species were thought to be represented in these lacustrine deposits: †Tharrhias feruglioi and †Luisiella inexcutata. In recent years, numerous complete and excellently preserved specimens have been collected, justifying revision of all available material. After a detailed anatomical study, we conclude that only one species of teleost is present in this fauna. †Tharrhias feruglioi and †L. inexcutata are synonyms and represent a single species, and due to the erroneous referral to the genus †Tharrhias, which designates a different fish, the new combination †Luisiella feruglioi is proposed. This study has revealed great morphological variability, which can be explained as intraspecific variability (ontogenetic and individual) as discussed herein. The overall morphology of †L. feruglioi resembles that of basal teleosts. In particular, †L. feruglioi is intriguingly similar to †Cavenderichthys talbragarensis from the continental Late Jurassic Talbragar Beds in Australia, owing to the presence of features not commonly found in known basal teleosts (hyomandibular bone with preopercular process, lower jaw with deep coronoid process and lacking a leptolepid notch in the dentary, and first uroneural anteriorly reaching the second preural centrum) and probably derived features such as a preopercular canal with few simple tubules. The resemblance between the Almada and Talbragar faunas has been recently proposed in reference to the coccolepidid species present in both Gondwanan faunas and is here discussed regarding the anatomical similarities shown by teleosts. © 2015 by the Society of Vertebrate Paleontology. Fil:Sferco, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:López-Arbarello, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:María Báez, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02724634_v35_n3_p_Sferco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic anatomy
Jurassic
morphology
taxonomy
teleost
Patagonia
Actinopterygii
Teleostei
spellingShingle anatomy
Jurassic
morphology
taxonomy
teleost
Patagonia
Actinopterygii
Teleostei
Sferco, E.
López-Arbarello, A.
María Báez, A.
Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
topic_facet anatomy
Jurassic
morphology
taxonomy
teleost
Patagonia
Actinopterygii
Teleostei
description The teleosts of the Late Jurassic Almada Fauna (Cañadón Calcáreo Formation) from Patagonia have been known for decades, but their taxonomic assignment has remained problematic. Two teleost species were thought to be represented in these lacustrine deposits: †Tharrhias feruglioi and †Luisiella inexcutata. In recent years, numerous complete and excellently preserved specimens have been collected, justifying revision of all available material. After a detailed anatomical study, we conclude that only one species of teleost is present in this fauna. †Tharrhias feruglioi and †L. inexcutata are synonyms and represent a single species, and due to the erroneous referral to the genus †Tharrhias, which designates a different fish, the new combination †Luisiella feruglioi is proposed. This study has revealed great morphological variability, which can be explained as intraspecific variability (ontogenetic and individual) as discussed herein. The overall morphology of †L. feruglioi resembles that of basal teleosts. In particular, †L. feruglioi is intriguingly similar to †Cavenderichthys talbragarensis from the continental Late Jurassic Talbragar Beds in Australia, owing to the presence of features not commonly found in known basal teleosts (hyomandibular bone with preopercular process, lower jaw with deep coronoid process and lacking a leptolepid notch in the dentary, and first uroneural anteriorly reaching the second preural centrum) and probably derived features such as a preopercular canal with few simple tubules. The resemblance between the Almada and Talbragar faunas has been recently proposed in reference to the coccolepidid species present in both Gondwanan faunas and is here discussed regarding the anatomical similarities shown by teleosts. © 2015 by the Society of Vertebrate Paleontology.
format JOUR
author Sferco, E.
López-Arbarello, A.
María Báez, A.
author_facet Sferco, E.
López-Arbarello, A.
María Báez, A.
author_sort Sferco, E.
title Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
title_short Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
title_full Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
title_fullStr Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
title_full_unstemmed Anatomical description and taxonomy of † Luisiella feruglioi (Bordas), new combination, a freshwater teleost (Actinopterygii, Teleostei) from the Upper Jurassic of Patagonia
title_sort anatomical description and taxonomy of † luisiella feruglioi (bordas), new combination, a freshwater teleost (actinopterygii, teleostei) from the upper jurassic of patagonia
url http://hdl.handle.net/20.500.12110/paper_02724634_v35_n3_p_Sferco
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AT lopezarbarelloa anatomicaldescriptionandtaxonomyofluisiellaferuglioibordasnewcombinationafreshwaterteleostactinopterygiiteleosteifromtheupperjurassicofpatagonia
AT mariabaeza anatomicaldescriptionandtaxonomyofluisiellaferuglioibordasnewcombinationafreshwaterteleostactinopterygiiteleosteifromtheupperjurassicofpatagonia
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