Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica
The seed cone Telemachus is known from several Triassic localities in Gondwana. New specimens from two localities in Antarctica provide additional information about the type species, Telemachus elongatus, based on details of morphology and anatomy revealed by using a modified transfer technique on t...
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ftconicet:oai:ri.conicet.gov.ar:11336/96162 2023-10-09T21:47:13+02:00 Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica Escapa, Ignacio Hernán Decombeix, Anne-Laure Taylor, Edith L. Taylor, Thomas N. application/pdf http://hdl.handle.net/11336/96162 eng eng University of Chicago Press info:eu-repo/semantics/altIdentifier/url/https://www.jstor.org/stable/10.1086/651948 info:eu-repo/semantics/altIdentifier/doi/10.1086/651948 http://hdl.handle.net/11336/96162 Escapa, Ignacio Hernán; Decombeix, Anne-Laure; Taylor, Edith L.; Taylor, Thomas N.; Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica; University of Chicago Press; International Journal of Plant Sciences; 171; 5; 6-2010; 560-573 1058-5893 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ TRIASSIC ANTARCTICA CONIFERS TELEMACHUS EVOLUTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1086/651948 2023-09-24T18:15:58Z The seed cone Telemachus is known from several Triassic localities in Gondwana. New specimens from two localities in Antarctica provide additional information about the type species, Telemachus elongatus, based on details of morphology and anatomy revealed by using a modified transfer technique on the compressed plants. Seed cones of T. elongatus are up to 6.0 cm long and characterized by conspicuous, elongate bracts. A second Antarctic species, described here as Telemachus antarcticus, is segregated, based on a shorter bract and differences in cone size. Newly recognized features of the genus include the shape, size, and disposition of the ovules; vascularization of the ovuliferous complex; and scale and bract histology. As a result of this new information, it is now possible to compare Telemachus with the permineralized Middle Triassic conifer seed cone Parasciadopitys from the Central Transantarctic Mountains. The similarities between the two genera make it possible to relate organs in different preservational modes and to develop a more complete concept for this widely distributed Gondwana conifer. Placing the Telemachus plant within a phylogenetic context makes it possible to evaluate the relationship with other so-called transitional conifers, an informal group that has been interpreted as intermediate between Paleozoic and modern conifers. Fil: Escapa, Ignacio Hernán. University of Kansas; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Decombeix, Anne-Laure. University of Kansas; Estados Unidos Fil: Taylor, Edith L. University of Kansas; Estados Unidos Fil: Taylor, Thomas N. University of Kansas; Estados Unidos Article in Journal/Newspaper Antarc* Antarctic Antarctica antarcticus CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Transantarctic Mountains Argentina Edith ENVELOPE(-57.617,-57.617,-63.583,-63.583) Hernán ENVELOPE(-62.867,-62.867,-64.900,-64.900) Laure ENVELOPE(-63.350,-63.350,-64.767,-64.767) International Journal of Plant Sciences 171 5 560 573 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
TRIASSIC ANTARCTICA CONIFERS TELEMACHUS EVOLUTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
TRIASSIC ANTARCTICA CONIFERS TELEMACHUS EVOLUTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Escapa, Ignacio Hernán Decombeix, Anne-Laure Taylor, Edith L. Taylor, Thomas N. Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
topic_facet |
TRIASSIC ANTARCTICA CONIFERS TELEMACHUS EVOLUTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The seed cone Telemachus is known from several Triassic localities in Gondwana. New specimens from two localities in Antarctica provide additional information about the type species, Telemachus elongatus, based on details of morphology and anatomy revealed by using a modified transfer technique on the compressed plants. Seed cones of T. elongatus are up to 6.0 cm long and characterized by conspicuous, elongate bracts. A second Antarctic species, described here as Telemachus antarcticus, is segregated, based on a shorter bract and differences in cone size. Newly recognized features of the genus include the shape, size, and disposition of the ovules; vascularization of the ovuliferous complex; and scale and bract histology. As a result of this new information, it is now possible to compare Telemachus with the permineralized Middle Triassic conifer seed cone Parasciadopitys from the Central Transantarctic Mountains. The similarities between the two genera make it possible to relate organs in different preservational modes and to develop a more complete concept for this widely distributed Gondwana conifer. Placing the Telemachus plant within a phylogenetic context makes it possible to evaluate the relationship with other so-called transitional conifers, an informal group that has been interpreted as intermediate between Paleozoic and modern conifers. Fil: Escapa, Ignacio Hernán. University of Kansas; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Decombeix, Anne-Laure. University of Kansas; Estados Unidos Fil: Taylor, Edith L. University of Kansas; Estados Unidos Fil: Taylor, Thomas N. University of Kansas; Estados Unidos |
format |
Article in Journal/Newspaper |
author |
Escapa, Ignacio Hernán Decombeix, Anne-Laure Taylor, Edith L. Taylor, Thomas N. |
author_facet |
Escapa, Ignacio Hernán Decombeix, Anne-Laure Taylor, Edith L. Taylor, Thomas N. |
author_sort |
Escapa, Ignacio Hernán |
title |
Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
title_short |
Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
title_full |
Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
title_fullStr |
Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
title_full_unstemmed |
Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica |
title_sort |
evolution and relationships of the conifer seed cone telemachus: evidence from the triassic of antarctica |
publisher |
University of Chicago Press |
url |
http://hdl.handle.net/11336/96162 |
long_lat |
ENVELOPE(-57.617,-57.617,-63.583,-63.583) ENVELOPE(-62.867,-62.867,-64.900,-64.900) ENVELOPE(-63.350,-63.350,-64.767,-64.767) |
geographic |
Antarctic Transantarctic Mountains Argentina Edith Hernán Laure |
geographic_facet |
Antarctic Transantarctic Mountains Argentina Edith Hernán Laure |
genre |
Antarc* Antarctic Antarctica antarcticus |
genre_facet |
Antarc* Antarctic Antarctica antarcticus |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.jstor.org/stable/10.1086/651948 info:eu-repo/semantics/altIdentifier/doi/10.1086/651948 http://hdl.handle.net/11336/96162 Escapa, Ignacio Hernán; Decombeix, Anne-Laure; Taylor, Edith L.; Taylor, Thomas N.; Evolution and relationships of the conifer seed cone telemachus: Evidence from the triassic of antarctica; University of Chicago Press; International Journal of Plant Sciences; 171; 5; 6-2010; 560-573 1058-5893 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1086/651948 |
container_title |
International Journal of Plant Sciences |
container_volume |
171 |
container_issue |
5 |
container_start_page |
560 |
op_container_end_page |
573 |
_version_ |
1779310145312915456 |