• Friday, Sep 24, 2021
  • Last Update : 12:12 pm

'Wonderchicken' fossil from Belgium reveals dawn of modern birds

  • Published at 05:02 pm March 22nd, 2020
Wonderchicken-Belgium
Artist's reconstruction of the world's oldest-known anatomically modern bird Reuters

The fossil bird has been given the scientific name of Asteriornis in reference to Asteria, the Greek Titan goddess of falling stars

A fossil unearthed in Belgium dubbed the "Wonderchicken" is providing a rare glimpse into the early evolution of modern birds at the twilight of the age of dinosaurs, right before an asteroid impact altered the course of life on Earth.

Researchers on Wednesday described a partridge-sized bird named Asteriornis maastrichtensis that inhabited a seashore environment 66.7 million years ago during the Cretaceous Period. It represents the oldest-known anatomically modern bird, sharing skull traits with today's landfowl like chickens, turkeys, quail and pheasants as well as waterfowl like ducks, geese and swans.

Birds evolved from small feathered dinosaurs roughly 150 million years ago. Many birds retained primitive features like teeth until the asteroid struck some 66 million years ago, triggering a mass extinction that erased three-quarters of Earth's plant and animal species.

A current estimate for the appearance of the common ancestor of all 11,000 living species of birds is somewhere between 100 million and 70 million years ago, based on DNA mutation rates. Until now the oldest fossil of an anatomically modern bird was one called Vegavis that lived 66.5 million years ago in Antarctica, though there is a debate about its placement on the bird family tree.

At first glance, the fossil looked unimpressively like a few broken limb bones poking out of a small rock.

"When we CT scanned the rocks to get a better look at the limb bones, we were shocked to discover an incredible, nearly complete skull peering out at us from the computer screen," said University of Cambridge paleontologist Daniel Field, lead author of the research published in the journal Nature.

"This skull is one of the best preserved fossil bird skulls of any age, so the fact that it is from such an important point in Earth history is amazing," Field added.

Field coined the "Wonderchicken" nickname, owing to its chicken-like beak and its scientific importance. Its scientific name Asteriornis honours Asteria, an ancient Greek goddess of falling stars, a nod to the imminent asteroid.

Asteriornis provides clues as to which factors may have helped some birds survive the asteroid impact while others perished, said paleontologist and study co-author Daniel Ksepka of the Bruce Museum in Greenwich, Connecticut.

Its relatively small size - a foot-long body - may have helped it survive as the global environmental calamity caused by the asteroid strike made it hard for larger animals to find enough to eat, Ksepka said.

Its adaptation to a shoreline environment, Ksepka added, meant it would have been spared from the wildfires believed to have destroyed most of the world's forests after the asteroid impact may have incinerated tree-dwelling birds.

51
Facebook 51
blogger sharing button blogger
buffer sharing button buffer
diaspora sharing button diaspora
digg sharing button digg
douban sharing button douban
email sharing button email
evernote sharing button evernote
flipboard sharing button flipboard
pocket sharing button getpocket
github sharing button github
gmail sharing button gmail
googlebookmarks sharing button googlebookmarks
hackernews sharing button hackernews
instapaper sharing button instapaper
line sharing button line
linkedin sharing button linkedin
livejournal sharing button livejournal
mailru sharing button mailru
medium sharing button medium
meneame sharing button meneame
messenger sharing button messenger
odnoklassniki sharing button odnoklassniki
pinterest sharing button pinterest
print sharing button print
qzone sharing button qzone
reddit sharing button reddit
refind sharing button refind
renren sharing button renren
skype sharing button skype
snapchat sharing button snapchat
surfingbird sharing button surfingbird
telegram sharing button telegram
tumblr sharing button tumblr
twitter sharing button twitter
vk sharing button vk
wechat sharing button wechat
weibo sharing button weibo
whatsapp sharing button whatsapp
wordpress sharing button wordpress
xing sharing button xing
yahoomail sharing button yahoomail