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Definitive fossil evidence for the extant avian radiation in the Cretaceous
Long-standing controversy surrounds the question of whether living bird lineages emerged after non-avian dinosaur extinction at the Cretaceous/Tertiary (K/T) boundary or whether these lineagesExpand
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Crossvallia unienwillia, a new Spheniscidae (Sphenisciformes, Aves) from the Late Paleocene of Antarctica Crossvallia unienwillia, un nouveau Spheniscidae (Sphenisciformes, Aves) du Paléocène
Modern penguins are typically small to medium-sized birds, and nearly all known modern specimens are smaller than the most archaic Paleogene relatives. Here we report an incomplete humerus,Expand
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Taxonomic revision of Eocene Antarctic penguins based on tarsometatarsal morphology
Eocene penguin remains from Seymour Island (Antarctica) are so far the old− est−known record of extinct Sphenisciformes. Rich Argentine and Polish collections of pen− guin bones from the La MesetaExpand
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Late Eocene penguins from West Antarctica: systematics and biostratigraphy
Abstract Penguins are by far the most dominant group of marine vertebrates in the Eocene La Meseta Formation (Seymour Island, Antarctica). We analysed the penguin fauna recovered there from both aExpand
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A new Miocene penguin from Patagonia and its phylogenetic relationships
We describe a new medium−sized penguin, Madrynornis mirandus gen. et sp. nov., from the early late Miocene Puerto Madryn Formation, Chubut Province, Argentina. Although it is evident that extant andExpand
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A LATE CRETACEOUS PRESBYORNITHIDAE (AVES: ANSERIFORMES) FROM VEGA ISLAND, ANTARCTIC PENINSULA: PALEOBIOGEOGRAPHIC IMPLICATIONS
This contribution reports the discovery of a Presbyornithidae (Aves: Anseriformes) from the Late Cretaceous of Vega Island, Antarct ica. The systematic position of the Presbyomithidae is underExpand
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Mechanical Analysis of Feeding Behavior in the Extinct “Terror Bird” Andalgalornis steulleti (Gruiformes: Phorusrhacidae)
The South American phorusrhacid bird radiation comprised at least 18 species of small to gigantic terrestrial predators for which there are no close modern analogs. Here we perform functionalExpand
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Predicting the distribution of the crested tinamous, Eudromia spp. (Aves, Tinamiformes)
A bioclimatic analysis of the crested tinamous was conducted to explore climatic factors underpinning the distribution of both Eudromia elegans and E. formosa and to evaluate its potentialExpand
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A New Mesembriornithinae (Aves, Phorusrhacidae) Provides New Insights Into the Phylogeny and Sensory Capabilities of Terror Birds
ABSTRACT Terror birds constitute the most outstanding group of the South American Cenozoic avifauna. Considered as apex predators, their hunting skills have recently been examined, but theirExpand
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Skull morphometry of Pygoscelis (Sphenisciformes): inter and intraspecific variations
Morphological diversity of 47 pygoscelid skulls was tested empirically through geometric morphometrics approach. Using 14 landmarks, shape is analyzed independently of other aspects of the body form.Expand
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