New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica

A new genus and species of cyathealean fern, Yavanna chimaerica gen. et sp. nov., is erected for several permineralized stems recovered from the Early Cretaceous (Aptian) Cerro Negro Formation, which crops out at the South Shetland Islands, Antarctica. The new species is characterized by solenosteli...

Full description

Bibliographic Details
Main Author: Vera, E.I.
Format: Journal/Newspaper
Language:unknown
Subjects:
Antarctica
Aptian
Cerro Negro Formation
Cyatheales
Livingston Island
South Shetland Islands
anatomy
Cretaceous
fern
new genus
new species
Cyatheaceae
Filicophyta
Thyrsopteris elegans
Antarc*
Online Access:https://hdl.handle.net/20.500.12110/paper_01956671_v44_n_p214_Vera
id ftunibueairesbd:todo:paper_01956671_v44_n_p214_Vera
record_format openpolar
spelling ftunibueairesbd:todo:paper_01956671_v44_n_p214_Vera 2023-10-29T02:30:42+01:00 New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica Vera, E.I. https://hdl.handle.net/20.500.12110/paper_01956671_v44_n_p214_Vera unknown http://hdl.handle.net/20.500.12110/paper_01956671_v44_n_p214_Vera info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Antarctica Aptian Cerro Negro Formation Cyatheales Livingston Island South Shetland Islands anatomy Cretaceous fern new genus new species Cyatheaceae Filicophyta Thyrsopteris elegans JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_01956671_v44_n_p214_Vera 2023-10-05T01:49:55Z A new genus and species of cyathealean fern, Yavanna chimaerica gen. et sp. nov., is erected for several permineralized stems recovered from the Early Cretaceous (Aptian) Cerro Negro Formation, which crops out at the South Shetland Islands, Antarctica. The new species is characterized by solenostelic erect stems with medullary bundles traversing the pith, and surrounded by persistent petiole bases and adventitious roots. Proximal petiole bases present a one-parted modified omega-shaped trace, which becomes three-parted distally. The anatomy of the new fern show similarities with both Thyrsopteris elegans Kunze and with the Cyatheaceae s.s., suggesting that it is a representative of an extinct lineage among the Cyatheales. © 2013 Elsevier Ltd. Fil:Vera, E.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Journal/Newspaper Antarc* Antarctica Livingston Island South Shetland Islands 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 Antarctica
Aptian
Cerro Negro Formation
Cyatheales
Livingston Island
South Shetland Islands
anatomy
Cretaceous
fern
new genus
new species
Cyatheaceae
Filicophyta
Thyrsopteris elegans
spellingShingle Antarctica
Aptian
Cerro Negro Formation
Cyatheales
Livingston Island
South Shetland Islands
anatomy
Cretaceous
fern
new genus
new species
Cyatheaceae
Filicophyta
Thyrsopteris elegans
Vera, E.I.
New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
topic_facet Antarctica
Aptian
Cerro Negro Formation
Cyatheales
Livingston Island
South Shetland Islands
anatomy
Cretaceous
fern
new genus
new species
Cyatheaceae
Filicophyta
Thyrsopteris elegans
description A new genus and species of cyathealean fern, Yavanna chimaerica gen. et sp. nov., is erected for several permineralized stems recovered from the Early Cretaceous (Aptian) Cerro Negro Formation, which crops out at the South Shetland Islands, Antarctica. The new species is characterized by solenostelic erect stems with medullary bundles traversing the pith, and surrounded by persistent petiole bases and adventitious roots. Proximal petiole bases present a one-parted modified omega-shaped trace, which becomes three-parted distally. The anatomy of the new fern show similarities with both Thyrsopteris elegans Kunze and with the Cyatheaceae s.s., suggesting that it is a representative of an extinct lineage among the Cyatheales. © 2013 Elsevier Ltd. Fil:Vera, E.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
format Journal/Newspaper
author Vera, E.I.
author_facet Vera, E.I.
author_sort Vera, E.I.
title New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
title_short New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
title_full New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
title_fullStr New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
title_full_unstemmed New cyathealean tree fern, Yavanna chimaerica gen. et sp. nov., from the Early Cretaceous of Livingston Island, Antarctica
title_sort new cyathealean tree fern, yavanna chimaerica gen. et sp. nov., from the early cretaceous of livingston island, antarctica
url https://hdl.handle.net/20.500.12110/paper_01956671_v44_n_p214_Vera
genre Antarc*
Antarctica
Livingston Island
South Shetland Islands
genre_facet Antarc*
Antarctica
Livingston Island
South Shetland Islands
op_relation http://hdl.handle.net/20.500.12110/paper_01956671_v44_n_p214_Vera
op_rights info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
op_doi https://doi.org/20.500.12110/paper_01956671_v44_n_p214_Vera
_version_ 1781061164408504320

Similar Items