Results 11 to 20 of about 526 (137)
An enigmatic fossil penguin from the Eocene of Antarctica
Polar Research, 2017 Tarsometatarsi are key skeletal elements in penguin palaeontology. They constitute, among others, type specimens of all 10 widely accepted species of fossil penguins from the Eocene La Meseta Formation on Seymour Island (Graham Land, Antarctic Peninsula).
Piotr Jadwiszczak, Thomas Mörs
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From fossils to conservation: an overview of Antarctic and sub-Antarctic penguins [PDF]
PolarforschungPenguins are among the most distinctive birds of the Antarctic and sub-Antarctic, and their story spans from extinct “giant” fossil species to the penguins that breed today.
R. Quilestino-Olario
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The pectoralis muscle orientation as an indicator of the modes of wing-propelled locomotion in birds. [PDF]
J AnatThe pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Akeda T, Fujiwara SI.
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Fossil and modern penguin tarsometatarsi: cavities, vascularity, and resilience. [PDF]
Integr ZoolAbstractPenguin tarsometatarsi are shortened and flattened, and studies devoted to the internal characteristics of these composite bones are very limited. Therefore, we present here a comprehensive, x‐ray‐microscopy‐based analysis based on tarsometatarsi of Eocene stem Sphenisciformes from Seymour Island (Antarctic Peninsula) as well as recent ...
Jadwiszczak P, Krüger A, Mörs T.
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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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A new fossil penguin from Australia [PDF]
Nature, 1959 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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An integrative insight into the synsacral canal of fossil and extant Antarctic penguins
Integrative Zoology, 2022 AbstractThe lumbosacral‐canal system in birds most likely operates as a sense organ involved in the control of balanced walking and perching, but our knowledge of it is superficial. Penguins constitute interesting objects for the study of this system due to their upright walking, but only the Humboldt penguin, Spheniscus humboldti, and some incomplete ...
JADWISZCZAK, Piotr +2 more
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Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis. [PDF]
Anat Rec (Hoboken)Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Atterholt J +5 more
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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 ...
Park, Travis, Fitzgerald, Erich M G
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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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