Archeology

This Tiny 120-Million-Year-Old Fossil Has a T.Rex-Like Skull on a Bird Body

A tiny, 120 million-year-old fossil, discovered in northeast China, is neither bird nor dinosaur but is perched on its own evolutionary branch, somewhere in between.

While the 2-centimeter-long (0.75-inch) skull of this little fella holds similarities to much larger dinosaurs like Tyrannosaurus rex, its thin and delicate body looks more like modern-day crown birds, such as sparrows or hummingbirds.

Careful CT scans and a detailed reconstruction of the fossil suggest this bizarre avian species once belonged to an extinct group of early birds called enantiornithines, or “opposite birds”.

Some other enantiornithines that have been discovered are no larger than a cockroach. This new one is slightly bigger and would have fit in the palm of your hand. Despite their diminutive size, these clawed and winged creatures were among the most abundant and diverse group of early birds living at the time.

While enantiornithines did not survive the Mesozoic mass extinction event, many of their traits still live on today and they are considered an important evolutionary step on the way to modern birds.

“Having a ‘dinosaur’ skull on a bird body certainly did not stop the enantiornithines, or other early birds, from being highly successful in places all around the world for tens of millions of years during the Cretaceous,” says paleontologist Min Wang from the Chinese Academy of Sciences.

The noggin on this early bird is particularly unique and excellently preserved. Unlike modern birds, whose upper jaws move independently from their brain case, which is known as cranial ‘kinesis’, the bones on this newly discovered skull are “locked up” and immovable.

They even show attachment points for jaw muscles, which are usually found in dinosaurs and reptiles, like lizards and alligators.

One bone in particular, known as the pterygoid, looked “exactly like that of the dromaeosaur Linheraptor”, according to Wang.

Linheraptor dinosaurs are bird-like theropods, an extinct group of dinosaurs that also includes meat-eaters like the T. rex and Velociraptor.

In fact, the back of this early bird’s skull resembles raptors more than it does living birds.

This suggests early birds could have evolved from a branch of dinosaurs that includes feathered Velociraptor and winged Microraptor.

“In combination with the ‘locked up’ temporal bones, the difference in the palate structure also points to the absence of kinesis among early birds,” says paleontologist Thomas Stidham from the Chinese Academy of Sciences.

This movement of the skull therefore must have evolved later, leading to the great diversity of skull shapes that we now see among modern crown birds.

“Despite their global conquest and success through the Cretaceous, only the crown group of birds with its derived assemblage of features, allowing for and driving cranial kinesis, survived the end Mesozoic mass extinction, and has thrived ever since,” the authors conclude.

The study was published in Nature Communications.

Related Posts

Incredible Find: 18th-Century Spanish Shipwreck Yields Treasure Trove of Coins and Gems Worth $17 Million.

The Colombian army released images of one of the world’s most valuable shipwrecks, the location of which was unknown for nearly three centuries. Spain’s San Jose galleon was loaded with…

Stunning Discovery: Archaeology Intern Unearths Ancient Roman Dagger Dating Back 2,000 Years, Revealing Astonishing Restoration Results.

When it was found, some people thought it looked like a “chicken tender”. They probably changed their mind soon. The dagger, or ‘chicken tender’, as it was originally…

Incredible Discovery: Ancient Egyptian City Reveals Perennial Wicker Fruit Basket Slice Knitting with Thorn Techniques Preserved for 2,400 Years Underwater

Researchers investigating the submerged metropolis of Thônis-Heracleion, in the Egyptian bay of Abū Qīr, have discovered wicker fruit baskets dated to the fourth century B.C.E. Incredibly, the vessels…

This Remarkable Viking Age Find: The Only Intact Wagon Unearthed, Sheds Light on Its Mysterious Purpose.

The exceptionally well-preserved wagon was found in a burial mound in Oseberg near the Oslo Fjord in Norway. The Oseberg cart, the only complete Viking wagon ever found….

The Enchanting Mystery of the Golden Kitchen: Uncovering a Mystical Gold Mine Underneath the Floorboards, Stirs the Curiosity of Historians and Treasure Hunters Alike!

Homeowners in the United Kingdom discovered a treasure trove of gold coins hidden beneath the wooden floorboards of their kitchen during a renovation. This gold vault, estimated to…

Jaw-Dropping Discovery: Massive Impact from Ancient Meteorite Created Earth’s Largest and Most Impressive Crater

Αгoυпd 2.2 Ьіɩɩіoп уeагѕ аɡo, а mаѕѕіⱱe ѕрасe гoсk сoɩɩіded аɡаіпѕt oυг рɩапet, ɩeаⱱіпɡ а mаѕѕіⱱe ѕсаг. Αɩtһoυɡһ tһe іmрасt ѕіte іѕ tһe oɩdeѕt foυпd to dаte, fіпdіпɡ…

Leave a Reply