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Fosil kuno kecil dari Spanyol menunjukkan burung terbang di atas kepala dinosaurus

Date:
October 6, 2015
Source:
Natural History Museum of Los Angeles County
Summary:
Sebuah penemuan baru mendokumentasikan pengaturan yang rumit dari otot-otot dan ligamen yang mengontrol  bulu utama sayap burung purba , mendukung gagasan bahwa setidaknya beberapa dari burung yang paling kuno melakukan  prestasi aerodinamis dalam mode mirip dengan banyak burung hidup .


.......... Sebuah tim internasional dari ahli paleontologi Spanyol dan Direktur NHM Institut Dinosaur , Dr. Luis M. Chiappe , mempelajari sayap yang sangat diawetkan dari burung - 125 juta tahun lalu  dari central Spanyol . Di luar tulang diawetkan dalam fosil , sayap kecil burung purba ini mengungkapkan rincian dari jaringan kompleks otot yang di burung modern mengontrol penyesuaian sayap bulu halus  utama ,  yang memungkinkan burung untuk menguasai langit ........more


Tiny ancient fossil from Spain shows birds flew over the heads of dinosaurs
Exceptional 125-million-year-old bird discovered
Date:
October 6, 2015
Source:
Natural History Museum of Los Angeles County
Summary:
A new discovery documents the intricate arrangement of the muscles and ligaments that controlled the main feathers of the wing of an ancient bird, supporting the notion that at least some of the most ancient birds performed aerodynamic feats in a fashion similar to those of many living birds.
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Birds have an enormously long evolutionary history: The earliest of them, the famed Archaeopteryx, lived 150 million years ago in what is today southern Germany. However, whether these early birds were capable of flying -- and if so, how well -- has remained shrouded in scientific controversy. A new discovery published in the journal Scientific Reportsdocuments the intricate arrangement of the muscles and ligaments that controlled the main feathers of the wing of an ancient bird, supporting the notion that at least some of the most ancient birds performed aerodynamic feats in a fashion similar to those of many living birds.
An international team of Spanish paleontologists and NHM's Director of the Dinosaur Institute, Dr. Luis M. Chiappe, studied the exceptionally preserved wing of a 125-million-year-old bird from central Spain. Beyond the bones preserved in the fossil, the tiny wing of this ancient bird reveals details of a complex network of muscles that in modern birds controls the fine adjustments of the wing's main feathers, allowing birds to master the sky.
"The anatomical match between the muscle network preserved in the fossil and those that characterize the wings of living birds strongly indicates that some of the earliest birds were capable of aerodynamic prowess like many present-day birds," said Chiappe, the investigation's senior scientist.
"It is very surprising that despite being skeletally quite different from their modern counterparts, these primitive birds show striking similarities in their soft anatomy," said Guillermo Navalón, a doctorate candidate at the University of Bristol in the United Kingdom and lead author of the report.
Ancient birds may have flown over the heads of dinosaurs but some aspects of the precise flight modes of these early fliers still remain unclear. "The new fossil provides us with a unique glimpse into the anatomy of the wing of the birds that lived amongst some of the largest dinosaurs," said Chiappe. "Fossils such as this are allowing scientists to dissect the most intricate aspects of the early evolution of the flight of birds." Other members of the research team included Dr. Jesús Marugán-Lobón, Dr. José Luis Sanz, and Dr. Ángela D. Buscalioni from Madrid's Universidad Autónoma in Spain.

Story Source:
The above post is reprinted from materials provided by Natural History Museum of Los Angeles CountyNote: Materials may be edited for content and length.

Journal Reference:
1.    Guillermo Navalón, Jesús Marugán-Lobón, Luis M. Chiappe, José Luis Sanz, Ángela D. Buscalioni. Soft-tissue and dermal arrangement in the wing of an Early Cretaceous bird: Implications for the evolution of avian flightScientific Reports, 2015; 5: 14864 DOI:10.1038/srep14864









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