Results 11 to 20 of about 1,895 (219)
Rivista Italiana di Paleontologia e Stratigrafia, 2012 Penguins have peculiar modifications in their skeletal anatomy as a consequence of their extremely specialized diving habit. Morphological specialization is particularly evident in the forelimb.
CAROLINA ACOSTA HOSPITALECHE +1 more
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Morphometric patterns in Recent and fossil penguins (Aves, Sphenisciformes) [PDF]
Journal of Zoology, 1989 A total of 622 skin specimens, 527 skeletons, and myological data compiled by Schreiweis (1972) were used to investigate morphometric patterns within and among the 18 Recent species of Spheniscidae, and to compare the family with a fighted species, the common diving‐petrel (Pelecanoides urinator), considered by some authorities to be similar to the ...
Bradley C. Livezey
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A review of Australian fossil penguins (Aves: Sphenisciformes) [PDF]
Memoirs of Museum Victoria, 2012 P ark, T. and Fitzgerald, E.M.G. 2012. A review of Australian fossil penguins (Aves: Sphenisciformes). Memoirs of Museum Victoria 69: 309–325. Australian fossil penguins (Sphenisciformes) are reviewed as a basis for future primary research. The five named species are based on type specimens of Eocene, Miocene—Pliocene and Holocene age collected from ...
Travis Park, Erich M. G. Fitzgerald
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Sphenisciformes, Gaviiformes, Podicipediformes, Procellariiformes, and Pelecaniformes
, 2018 Penguins are flightless seabirds with unique anatomy. Although susceptible to a wide range of diseases, aspergillosis and avian malaria dominate captive mortalities, whereas starvation impacts free-ranging colonies. Gastrointestinal foreign bodies, pododermatitis, drug and heavy metal toxicities are relevant in captivity; oil and algal biotoxicities in
Mark F. Stidworthy, Daniela Denk
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Bone histology in extant and fossil penguins (Aves: Sphenisciformes) [PDF]
Journal of Anatomy, 2015 AbstractSubstantial changes in bone histology accompany the secondary adaptation to life in the water. This transition is well documented in several lineages of mammals and non‐avian reptiles, but has received relatively little attention in birds. This study presents new observations on the long bone microstructure of penguins, based on histological ...
Daniel T. Ksepka +3 more
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Paraptenodytes antarcticus (Aves: Sphenisciformes) en la Formación Puerto Madryn (Mioceno
Spanish Journal of Palaeontology, 2021 La mayor parte de los pingüinos fósiles registrados en la Argentina fueron exhumados de los sedimentos del “Patagoniano”, hoy referidos a la Formación San Julián (Eoceno superior-Oligoceno inferior), Formación Monte León y Formación Gaiman (Mioceno inferior) y sólo unos pocos fueron hallados en la Formación Puerto Madryn (Mioceno superior ...
Carolina Acosta Hospitaleche
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Skeletal elements of the penguin eye and their functional and phylogenetic implications (Aves: Sphenisciformes: Spheniscidae) [PDF]
Journal of Morphology, 2021 Abstract Scleral ossicles and other bony elements are present in the eyes of many vertebrates, including birds. In this study, the skeletal elements present in the penguin eye and orbit were imaged using macro photographs and micro‐computed tomography (micro‐CT), to help elucidate their function and significance ...
Peter W. Hadden +3 more
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A Reproducible, Data-Driven Approach to Mapping Species Distributions Using Presence-Only Data and Biogeographic Templates. [PDF]
Ecol EvolThis study presents a novel, data‐driven approach for mapping species' extent of occurrence (EOO) that addresses the issues of reproducibility and precision of expert‐derived range maps. By combining presence‐only data with the operational units of a biogeographic template within a consistent quantitative framework, our approach generates spatially ...
Montalvo-Mancheno CS +3 more
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Insight Into Body Size Evolution in Aves: Based on Some Body Size-Related Genes. [PDF]
Integr ZoolThese findings provide new insights into the genetic determinants of body size evolutionary mechanisms in Aves. ABSTRACT Birds exhibit remarkable variations in body size, making them an ideal group for the study of adaptive evolution. However, the genetic mechanisms underlying body size evolution in avian species remain inadequately understood.
Luo C +8 more
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Biological relevance and methodological implications of unexpected hearing thresholds in a diving bird [PDF]
Scientific ReportsMany animals alternate between different media, such as air and water, thanks to specific adaptations. Among birds, penguins (Sphenisciformes) have the most extreme morphological, physiological, and behavioural adaptations to their amphibious lifestyle ...
Helen Rößler, Anne May, Michael Dähne
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