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Wing bone geometry reveals active flight in Archaeopteryx

DFAE. Voeten, J. Cubo, E. de Margerie, M. Röper, V. Beyrand, S. Bureš, P. Tafforeau, S. Sanchez,

. 2018 ; 9 (1) : 923. [pub] 20180313

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu srovnávací studie, časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc18024305

Archaeopteryx is an iconic fossil taxon with feathered wings from the Late Jurassic of Germany that occupies a crucial position for understanding the early evolution of avian flight. After over 150 years of study, its mosaic anatomy unifying characters of both non-flying dinosaurs and flying birds has remained challenging to interpret in a locomotory context. Here, we compare new data from three Archaeopteryx specimens obtained through phase-contrast synchrotron microtomography to a representative sample of archosaurs employing a diverse array of locomotory strategies. Our analyses reveal that the architecture of Archaeopteryx's wing bones consistently exhibits a combination of cross-sectional geometric properties uniquely shared with volant birds, particularly those occasionally utilising short-distance flapping. We therefore interpret that Archaeopteryx actively employed wing flapping to take to the air through a more anterodorsally posteroventrally oriented flight stroke than used by modern birds. This unexpected outcome implies that avian powered flight must have originated before the latest Jurassic.

Citace poskytuje Crossref.org

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$a Voeten, Dennis F A E $u European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS-40220, 38043, Grenoble Cedex, France. dennis.voeten01@upol.cz. Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 771 46, Olomouc, Czech Republic. dennis.voeten01@upol.cz.
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$a Wing bone geometry reveals active flight in Archaeopteryx / $c DFAE. Voeten, J. Cubo, E. de Margerie, M. Röper, V. Beyrand, S. Bureš, P. Tafforeau, S. Sanchez,
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$a Archaeopteryx is an iconic fossil taxon with feathered wings from the Late Jurassic of Germany that occupies a crucial position for understanding the early evolution of avian flight. After over 150 years of study, its mosaic anatomy unifying characters of both non-flying dinosaurs and flying birds has remained challenging to interpret in a locomotory context. Here, we compare new data from three Archaeopteryx specimens obtained through phase-contrast synchrotron microtomography to a representative sample of archosaurs employing a diverse array of locomotory strategies. Our analyses reveal that the architecture of Archaeopteryx's wing bones consistently exhibits a combination of cross-sectional geometric properties uniquely shared with volant birds, particularly those occasionally utilising short-distance flapping. We therefore interpret that Archaeopteryx actively employed wing flapping to take to the air through a more anterodorsally posteroventrally oriented flight stroke than used by modern birds. This unexpected outcome implies that avian powered flight must have originated before the latest Jurassic.
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$a Cubo, Jorge $u Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005, Paris, France.
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$a Sanchez, Sophie $u European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS-40220, 38043, Grenoble Cedex, France. Science for Life Laboratory and Uppsala University, Subdepartment of Evolution and Development, Department of Organismal Biology, Evolutionary Biology Centre, Norbyvägen 18A, 752 36, Uppsala, Sweden.
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