A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons

Antarctoboenus carlinii nov. gen. nov. sp. is a large-sized falconiform bird from the La Meseta Formation (Lower Eocene) at Seymour (Marambio) Island, West Antarctica. The holotypical tarsometatarsus was originally assigned to Falconidae and its affinities to Polyborinae were pointed out. Detailed o...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Cenizo, Marcos Martín, Noriega, Jorge Ignacio, Reguero, Marcelo Alfredo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Naturales
Fossil bird
Falconiformes
Paleogene
Seymour Island
Stem lineage
Antarctoboenus carlinii
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/107977
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-107977
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
Fossil bird
Falconiformes
Paleogene
Seymour Island
Stem lineage
Antarctoboenus carlinii
spellingShingle Ciencias Naturales
Fossil bird
Falconiformes
Paleogene
Seymour Island
Stem lineage
Antarctoboenus carlinii
Cenizo, Marcos Martín
Noriega, Jorge Ignacio
Reguero, Marcelo Alfredo
A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
topic_facet Ciencias Naturales
Fossil bird
Falconiformes
Paleogene
Seymour Island
Stem lineage
Antarctoboenus carlinii
description Antarctoboenus carlinii nov. gen. nov. sp. is a large-sized falconiform bird from the La Meseta Formation (Lower Eocene) at Seymour (Marambio) Island, West Antarctica. The holotypical tarsometatarsus was originally assigned to Falconidae and its affinities to Polyborinae were pointed out. Detailed osteological and comparative analyses of the Antarctic specimen allowed recognition of the new taxon as a member of stem group Falconidae, i.e. it is supposed to belong to the early radiation of the falconiform lineage. Antarctoboenus carlinii is distinguished from members of crown group Falconidae by having a very shallow sulcus extensorius, a large foramen vasculare distale, an undistinguishable tendinal attachment for the m. adductor digiti II, and short trochlea metatarsi II, among its main diagnostic characters. Purported phylogenetic relationships between A. carlinii and Polyborinae are based on plesiomorphic characters retained in the tarsometatarsus of the latter clade. Our conclusions reinforce the hypothesis about the Neotropical or Austral origin of Falconidae supported by previous molecular phylogenies.
format Articulo
Articulo
author Cenizo, Marcos Martín
Noriega, Jorge Ignacio
Reguero, Marcelo Alfredo
author_facet Cenizo, Marcos Martín
Noriega, Jorge Ignacio
Reguero, Marcelo Alfredo
author_sort Cenizo, Marcos Martín
title A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
title_short A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
title_full A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
title_fullStr A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
title_full_unstemmed A stem falconid bird from the Lower Eocene of Antarctica and the early southern radiation of the falcons
title_sort stem falconid bird from the lower eocene of antarctica and the early southern radiation of the falcons
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/107977
work_keys_str_mv AT cenizomarcosmartin astemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
AT noriegajorgeignacio astemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
AT regueromarceloalfredo astemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
AT cenizomarcosmartin stemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
AT noriegajorgeignacio stemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
AT regueromarceloalfredo stemfalconidbirdfromthelowereoceneofantarcticaandtheearlysouthernradiationofthefalcons
bdutipo_str Repositorios
_version_ 1764820443838021633

Ejemplares similares