Late Jurassic fishes from longing gap, Antarctic Peninsula
Few records of Late Jurassic fishes have been reported previously from Antarctica. They include an indeterminate teleost from the Ameghino (Nordenskjöld) Formation at Longing Gap and two incomplete aspidorhyn-chiforms from James Ross Island, all of presumed Late Jurassic age. New fish material recen...
Main Authors: | , , |
---|---|
Format: | Journal/Newspaper |
Language: | unknown |
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.12110/paper_02724634_v24_n1_p41_Arratia |
id |
ftunibueairesbd:todo:paper_02724634_v24_n1_p41_Arratia |
---|---|
record_format |
openpolar |
spelling |
ftunibueairesbd:todo:paper_02724634_v24_n1_p41_Arratia 2023-10-29T02:31:49+01:00 Late Jurassic fishes from longing gap, Antarctic Peninsula Arratia, G. Scasso, R.A. Kiessling, W. https://hdl.handle.net/20.500.12110/paper_02724634_v24_n1_p41_Arratia unknown http://hdl.handle.net/20.500.12110/paper_02724634_v24_n1_p41_Arratia info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar fish fossil Jurassic new genus new species Antarctic Peninsula Antarctica Graham Land West Antarctica Aspidorhynchiformes Ichthyodectiformes Pisces teleost fish Teleostei JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_02724634_v24_n1_p41_Arratia 2023-10-05T01:29:51Z Few records of Late Jurassic fishes have been reported previously from Antarctica. They include an indeterminate teleost from the Ameghino (Nordenskjöld) Formation at Longing Gap and two incomplete aspidorhyn-chiforms from James Ross Island, all of presumed Late Jurassic age. New fish material recently recovered in the Upper Jurassic of Longing Gap is described. The new material consists of one piece of body squamation, which, based on the structure of the scales, corresponds to a new genus and species (Ameghinichthys antarcticus gen. et sp. nov.) of an indeterminate actinopterygian family; one aspidorhynchiform identified as Vinctifer sp. due to the structure and distribution of the scales; and numerous specimens of a new ichthyodectiform, Antarctithrissops seymouri gen. et sp. nov. This new genus differs from European ichthyodectiforms in the shape of the preopercle, the presence of long sensory preopercular branches almost reaching the posterior margin of the bone, and the uncommon structure of the scales, with a fine layer of bone obscuring the circuli. The presence of Vinctifer in the Antarctic is consistent with its other Gondwanan records. The Ichthyodectiformes, previously known from four European genera, extends the distribution of the group to the southernmost part of the Southern Hemisphere during the Late Jurassic. In contrast to most non-teleostean fishes, the known Late Jurassic teleosts apparently are species endemic to restricted areas in the Southern Hemisphere. © 2004 by the Society of Vertebrate Paleontology. Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Graham Land James Ross Island Ross Island West Antarctica Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
fish fossil Jurassic new genus new species Antarctic Peninsula Antarctica Graham Land West Antarctica Aspidorhynchiformes Ichthyodectiformes Pisces teleost fish Teleostei |
spellingShingle |
fish fossil Jurassic new genus new species Antarctic Peninsula Antarctica Graham Land West Antarctica Aspidorhynchiformes Ichthyodectiformes Pisces teleost fish Teleostei Arratia, G. Scasso, R.A. Kiessling, W. Late Jurassic fishes from longing gap, Antarctic Peninsula |
topic_facet |
fish fossil Jurassic new genus new species Antarctic Peninsula Antarctica Graham Land West Antarctica Aspidorhynchiformes Ichthyodectiformes Pisces teleost fish Teleostei |
description |
Few records of Late Jurassic fishes have been reported previously from Antarctica. They include an indeterminate teleost from the Ameghino (Nordenskjöld) Formation at Longing Gap and two incomplete aspidorhyn-chiforms from James Ross Island, all of presumed Late Jurassic age. New fish material recently recovered in the Upper Jurassic of Longing Gap is described. The new material consists of one piece of body squamation, which, based on the structure of the scales, corresponds to a new genus and species (Ameghinichthys antarcticus gen. et sp. nov.) of an indeterminate actinopterygian family; one aspidorhynchiform identified as Vinctifer sp. due to the structure and distribution of the scales; and numerous specimens of a new ichthyodectiform, Antarctithrissops seymouri gen. et sp. nov. This new genus differs from European ichthyodectiforms in the shape of the preopercle, the presence of long sensory preopercular branches almost reaching the posterior margin of the bone, and the uncommon structure of the scales, with a fine layer of bone obscuring the circuli. The presence of Vinctifer in the Antarctic is consistent with its other Gondwanan records. The Ichthyodectiformes, previously known from four European genera, extends the distribution of the group to the southernmost part of the Southern Hemisphere during the Late Jurassic. In contrast to most non-teleostean fishes, the known Late Jurassic teleosts apparently are species endemic to restricted areas in the Southern Hemisphere. © 2004 by the Society of Vertebrate Paleontology. |
format |
Journal/Newspaper |
author |
Arratia, G. Scasso, R.A. Kiessling, W. |
author_facet |
Arratia, G. Scasso, R.A. Kiessling, W. |
author_sort |
Arratia, G. |
title |
Late Jurassic fishes from longing gap, Antarctic Peninsula |
title_short |
Late Jurassic fishes from longing gap, Antarctic Peninsula |
title_full |
Late Jurassic fishes from longing gap, Antarctic Peninsula |
title_fullStr |
Late Jurassic fishes from longing gap, Antarctic Peninsula |
title_full_unstemmed |
Late Jurassic fishes from longing gap, Antarctic Peninsula |
title_sort |
late jurassic fishes from longing gap, antarctic peninsula |
url |
https://hdl.handle.net/20.500.12110/paper_02724634_v24_n1_p41_Arratia |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Graham Land James Ross Island Ross Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Graham Land James Ross Island Ross Island West Antarctica |
op_relation |
http://hdl.handle.net/20.500.12110/paper_02724634_v24_n1_p41_Arratia |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_02724634_v24_n1_p41_Arratia |
_version_ |
1781052636716335104 |