New dinosaur fossil challenges bird evolution theory
24/01/13 21:04
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New Dinosaur Fossil Challenges Bird Evolution Theory
Jan. 24, 2013 — The discovery of a new bird-like
dinosaur from the Jurassic period challenges
widely accepted theories on the origin of flight.
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Over many years, it has become
accepted among palaeontologists
that birds evolved from a group of
dinosaurs called theropods from the
Early Cretaceous period of Earth's
history, around 120-130 million years
ago. Recent discoveries of feathered
dinosaurs from the older Middle-Late
Jurassic period have reinforced this
theory.
Plants & Animals
Birds
Evolutionary Biology
Bird Flu Research
The new 'bird-dinosaur' Eosinopteryx
described in Nature Communications
this week provides additional
evidence to this effect.
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Fossil
"This discovery sheds further doubt
on the theory that the famous fossil
Archaeopteryx -- or "first bird" as it is
sometimes referred to -- was pivotal
in the evolution of modern birds,"
Reference
says Dr Dyke, who is based at the
Archaeopteryx
National Oceanography Centre,
Feathered dinosaurs Southampton.
Mesozoic
"Our findings suggest that the origin
Pterosaur
of flight was much more complex
than previously thought."
Fossils & Ruins
Dinosaurs
Early Birds
Paleontology
The fossilised remains found in north-eastern China indicate
that, while feathered, this was a flightless dinosaur, because of
its small wingspan and a bone structure that would have
restricted its ability to flap its wings.
The dinosaur also had toes suited to walking along the ground
and fewer feathers on its tail and lower legs, which would have
made it easier to run.
Dr Gareth Dyke is also Programme Leader for a new one-year
MRes in Vertebrate Palaeontology, which offers potential
students the chance to study the evolution and anatomy of
vertebrates, in order to inform and increase our understanding
of the workings of modern day creatures.
Dr Dyke's co-authors are Pascal Godefroit of the Royal Belgian
Institute of Natural Sciences, Helena Demuynck of Earth
System Science Vrije Universiteit Brussel, Dongyu Hu of
Paleontological Institute Shenyang Normal University China
and Key Laboratory of Vegetation Ecology Northeast Normal
University China, François Escuillié of Eldonia France and
Philippe Claeys of Jilin University Geological Museum China.
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Co-authored by Dr Gareth Dyke,
Senior Lecturer in Vertebrate
Palaeontology at the University of
Southampton, the paper describes a
new feathered dinosaur about 30 cm
in length which pre-dates bird-like
dinosaurs that birds were long
thought to have evolved from.
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Story Source:
The above story is reprinted from materials provided by
University of Southampton.
Note: Materials may be edited for content and length. For
Reconstruction of Eosinopteryx. (Credit: Royal
Belgian Institute of Natural Sciences)
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New dinosaur fossil challenges bird evolution theory
further information, please contact the source cited above.
Journal Reference:
1. Pascal Godefroit, Helena Demuynck, Gareth Dyke, Dongyu
Hu, François Escuillié, Philippe Claeys. Reduced plumage
and flight ability of a new Jurassic paravian theropod
from China. Nature Communications, 2013; 4: 1394 DOI:
10.1038/ncomms2389
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24/01/13 21:04
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University of Southampton (2013, January 24).
New dinosaur fossil challenges bird evolution
theory. ScienceDaily. Retrieved January 24,
2013, from http://www.sciencedaily.com​
/releases/2013/01/130124091532.htm
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