Results 201 to 210 of about 1,895 (219)
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The phylogeny of the living and fossil Sphenisciformes (penguins)
Cladistics, 2006AbstractWe present the first phylogenetic analysis of the Sphenisciformes that extensively samples fossil taxa. Combined analysis of 181 morphological characters and sequence fragments from mitochondrial and nuclear genes (12S, 16S, COI, cytochrome b, RAG‐1) yields a largely resolved tree.
Daniel T. Ksepka +2 more
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Evolutionary Biology, 2010
The cervical system of extant penguins (Aves: Sphenisciformes) is organised into morphological modules, each with its biomechanical function. Indeed, for these marine pelagic birds to acquire hydrodynamic morphology, the folding of the neck is essential.
Guinard, Geoffrey, Marchand, Didier
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The cervical system of extant penguins (Aves: Sphenisciformes) is organised into morphological modules, each with its biomechanical function. Indeed, for these marine pelagic birds to acquire hydrodynamic morphology, the folding of the neck is essential.
Guinard, Geoffrey, Marchand, Didier
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The Humerus and Stratigraphic Range of Palaeospheniscus (Aves, Sphenisciformes)
Ameghiniana, 2014Abstract. A comparison between the Paleogene and Neogene marine assemblages in South America suggests a major turnover among penguins by the late Miocene, with the disappearance of the stem Sphenisciformes and the rise of the modern penguins. However, isolated specimens attributed to Palaeospheniscus from the late Miocene of Chile suggest that stem and
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First diagnosable non-sphenisciform bird from the early Paleocene of New Zealand
Journal of the Royal Society of New Zealand, 2014A new avian taxon from the early Paleocene Waipara Greensand in Canterbury, New Zealand, is described. The holotype of Australornis lovei, gen. et sp. nov. includes wing and pectoral girdle bones, which exhibit distinctive morphologies. Notable features are a very long crista deltopectoralis, a craniocaudally flattened shaft, and a large tuberculum ...
G Mayr, RP Scofield
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Cladistics, 2005
AbstractThe phylogenetic relationships among the penguins have received little attention, despite their well‐known anatomy and the conspicuous nature of the group. Previous attempts have included datasets limited to few, mostly osteological characters, and one study was based on integumentary and breeding characters. We developed a morphological matrix
Sara Bertelli, Norberto P. Giannini
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AbstractThe phylogenetic relationships among the penguins have received little attention, despite their well‐known anatomy and the conspicuous nature of the group. Previous attempts have included datasets limited to few, mostly osteological characters, and one study was based on integumentary and breeding characters. We developed a morphological matrix
Sara Bertelli, Norberto P. Giannini
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A study of the egg shells of the Sphenisciformes
Proceedings of the Zoological Society of London, 1965Studies on the egg shells of a selection of Sphenisciformes, similar to previous ones on ratites and the Anatidae, have been carried out. The true shells, after removing the membrane and cover, were analysed for insoluble and soluble nitrogen, and studies were also made using histological and plastic embedding techniques.The combined studies indicate ...
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Historical Biology, 2006
Our knowledge of the cranial morphology of early penguins remains poor, particularly for Paleogene taxa. This paper describes a partial penguin skull and additional isolated cranial elements from the Eocene La Meseta Formation of Seymour Island, Antarctica.
Daniel T. Ksepka, Sara Bertelli
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Our knowledge of the cranial morphology of early penguins remains poor, particularly for Paleogene taxa. This paper describes a partial penguin skull and additional isolated cranial elements from the Eocene La Meseta Formation of Seymour Island, Antarctica.
Daniel T. Ksepka, Sara Bertelli
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Journal of Paleontology, 2008
The penguin skeleton studied here constitutes the fourth partial skeleton found in Patagonia, and the third one with an associated humerus and tarsometatarsus. The finding of this partial skeleton identified with certainty asPalaeospheniscus patagonicusMoreno and Mercerat, 1891 (Aves, Sphenisciformes) allows the first description of elements other than
Carolina Acosta Hospitaleche +3 more
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The penguin skeleton studied here constitutes the fourth partial skeleton found in Patagonia, and the third one with an associated humerus and tarsometatarsus. The finding of this partial skeleton identified with certainty asPalaeospheniscus patagonicusMoreno and Mercerat, 1891 (Aves, Sphenisciformes) allows the first description of elements other than
Carolina Acosta Hospitaleche +3 more
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Marine Pollution Bulletin, 2011
Magellanic penguins (Spheniscus magellanicus) are non-breeding winter visitors to the Brazilian coast. In 2008 and 2010, plastic items and other marine debris were found in the stomachs and intestines of 15% of 175 dead penguins collected in the Lagos Region of the state of Rio de Janeiro.
Martha L, Brandão +2 more
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Magellanic penguins (Spheniscus magellanicus) are non-breeding winter visitors to the Brazilian coast. In 2008 and 2010, plastic items and other marine debris were found in the stomachs and intestines of 15% of 175 dead penguins collected in the Lagos Region of the state of Rio de Janeiro.
Martha L, Brandão +2 more
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