Abstract:
From complex songs to simple honks, birds produce sounds using a unique vocal organ called the syrinx. Located close to the heart at the tracheobronchial junction, vocal folds or membranes attached to modified mineralized rings vibrate to produce sound. Syringeal components were not thought to commonly enter the fossil record, and the few reported fossilized parts of the syrinx are geologically young (from the Pleistocene and Holocene (approximately 2.5 million years ago to the present)). The only known older syrinx is an Eocene specimen that was not described or illustrated. Data on the relationship between soft tissue structures and syringeal three-dimensional geometry are also exceptionally limited. Here we describe the first remains, to our knowledge, of a fossil syrinx from the Mesozoic Era, which are preserved in three dimensions in a specimen from the Late Cretaceous (approximately 66 to 69 million years ago) of Antarctica. With both cranial and postcranial remains, the new Vegavis iaai specimen is the most complete to be recovered from a part of the radiation of living birds (Aves). Enhanced-contrast X-ray computed tomography (CT) of syrinx structure in twelve extant non-passerine birds, as well as CT imaging of the Vegavis and Eocene syrinxes, informs both the reconstruction of ancestral states in birds and properties of the vocal organ in the extinct species. Fused rings in Vegavis form a well-mineralized pessulus, a derived neognath bird feature, proposed to anchor enlarged vocal folds or labia. Left-right bronchial asymmetry, as seen in Vegavis, is only known in extant birds with two sets of vocal fold sound sources. The new data show the fossilization potential of the avian vocal organ and beg the question why these remains have not been found in other dinosaurs. The lack of other Mesozoic tracheobronchial remains, and the poorly mineralized condition in archosaurian taxa without a syrinx, may indicate that a complex syrinx was a late arising feature in the evolution of birds, well after the origin of flight and respiratory innovations. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Fossil evidence of the avian vocal organ from the Mesozoic |
Autor: | Clarke, J.A.; Chatterjee, S.; Li, Z.; Riede, T.; Agnolin, F.; Goller, F.; Isasi, M.P.; Martinioni, D.R.; Mussel, F.J.; Novas, F.E. |
Filiación: | Department of Geological Sciences, University of Texas at Austin, Austin, TX 78756, United States Museum of Texas Tech University, Box 43191, Lubbock, TX 79409, United States Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, 100044, China Department of Physiology, Midwestern University, 19555 N 59th Avenue, Glendale, AZ 85308, United States CONICET, Laboratorio de Anatomía Comparada y Evolución de los Vertebrados, Museo Argentino de Ciencias Naturales, Av. Ángel Gallardo 470, Buenos Aires, C1405DJR, Argentina Fundación de Historia Natural 'Félix de Azara', Universidad Maimónides, Hidalgo 775, Buenos Aires, C1405BDB, Argentina Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, UT 84112, United States Laboratorio de Geologia Andina, CADIC, CONICET, B.Houssay 200, Ushuaia, Tierra del Fuego, CP V9410CAB, Argentina Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Buenos Aires, CP C1405DJR, Argentina
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Palabras clave: | iodinated contrast medium; brain; Cretaceous; dinosaur; Eocene; flight; fossil record; fossilization; geometry; Holocene; passerine; tomography; animal tissue; archosaur; Article; bird; computer assisted tomography; contrast enhancement; Eocene; fossil; Holocene; Mesozoic; nonhuman; Pleistocene; priority journal; syrinx; taxon; thoracic vertebra; Upper Cretaceous; Vegavis iaai; vocal cord; anatomy and histology; animal; animal structures; Antarctica; bird; dinosaur; evolution; skull; species extinction; vocalization; Antarctica; Archosauria; Aves; Dinosauria; Passeriformes; Animal Structures; Animals; Antarctic Regions; Biological Evolution; Birds; Dinosaurs; Extinction, Biological; Fossils; Skull; Vocalization, Animal |
Año: | 2016
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Volumen: | 538
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Número: | 7626
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Página de inicio: | 502
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Página de fin: | 505
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DOI: |
http://dx.doi.org/10.1038/nature19852 |
Título revista: | Nature
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Título revista abreviado: | Nature
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ISSN: | 00280836
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CODEN: | NATUA
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00280836_v538_n7626_p502_Clarke |
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Citas:
---------- APA ----------
Clarke, J.A., Chatterjee, S., Li, Z., Riede, T., Agnolin, F., Goller, F., Isasi, M.P.,..., Novas, F.E.
(2016)
. Fossil evidence of the avian vocal organ from the Mesozoic. Nature, 538(7626), 502-505.
http://dx.doi.org/10.1038/nature19852---------- CHICAGO ----------
Clarke, J.A., Chatterjee, S., Li, Z., Riede, T., Agnolin, F., Goller, F., et al.
"Fossil evidence of the avian vocal organ from the Mesozoic"
. Nature 538, no. 7626
(2016) : 502-505.
http://dx.doi.org/10.1038/nature19852---------- MLA ----------
Clarke, J.A., Chatterjee, S., Li, Z., Riede, T., Agnolin, F., Goller, F., et al.
"Fossil evidence of the avian vocal organ from the Mesozoic"
. Nature, vol. 538, no. 7626, 2016, pp. 502-505.
http://dx.doi.org/10.1038/nature19852---------- VANCOUVER ----------
Clarke, J.A., Chatterjee, S., Li, Z., Riede, T., Agnolin, F., Goller, F., et al. Fossil evidence of the avian vocal organ from the Mesozoic. Nature. 2016;538(7626):502-505.
http://dx.doi.org/10.1038/nature19852