Perpetual dinosaur thread

What's your artifact doing in Boss Kean's ditch?
User avatar
Witness
Posts: 21282
Joined: Thu Sep 19, 2013 5:50 pm

Perpetual dinosaur thread

Post by Witness » Wed Jul 31, 2019 2:57 am

Discoveries are regularly made, so we'll have a neat thread. (And one day, I'm sure, Pyrrho will rename the sub-forum to Archaeology & Paleontology… :mrgreen: )
New Bird-Like Dinosaur Unearthed in Wyoming

A new species of carnivorous bird-like dinosaur being named Hesperornithoides miessleri has been discovered by an international team of paleontologists from the United States and the United Kingdom.
Details.

They seem extremely cute.

Image

ed should keep a couple around Lake ed! :)

User avatar
Abdul Alhazred
Posts: 76130
Joined: Mon Jun 07, 2004 1:33 pm
Title: Yes, that one.
Location: Chicago

Re: Perpetual dinosaur thread

Post by Abdul Alhazred » Wed Jul 31, 2019 12:32 pm

By definition, there can be no such thing as a bird-like dinosaur.

Dinosaurs are birds.

So they found a bird-like bird. Cool. :P
Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
Any man writes a mission statement spends a night in the box.
-- our mission statement plappendale

User avatar
Witness
Posts: 21282
Joined: Thu Sep 19, 2013 5:50 pm

Re: Perpetual dinosaur thread

Post by Witness » Thu Aug 01, 2019 2:09 am

How wrong you are: birds ⊂ dinosaurs, not the other way round.


Recent find:

Image
The two-meter long femur at the Angeac-Charente site is thought to have belonged to a sauropod, herbivorous dinosaurs with long necks and tails which were widespread in the late Jurassic era, over 140 million years ago.

User avatar
Witness
Posts: 21282
Joined: Thu Sep 19, 2013 5:50 pm

Re: Perpetual dinosaur thread

Post by Witness » Sun Aug 04, 2019 1:53 am

Abdul Alhazred wrote:
Wed Jul 31, 2019 12:32 pm
By definition, there can be no such thing as a bird-like dinosaur.

Dinosaurs are birds.

So they found a bird-like bird. Cool. :P
Feathers Arose 80 Million Years before Birds, Scientists Say

According to a new review paper published in the journal Trends in Ecology & Evolution, feathers arose 250-230 million years ago, during the Early Triassic, when life was recovering from the devastating end-Permian mass extinction.

Image

It is shocking to realize that feathers originated long before birds because feathers have generally been regarded as the key innovation that drove the success of the avian fauna.

However, thousands of fossils from China have shown that many non-avian dinosaurs also had feathers, including feather types not found in birds today.

Those discoveries extended the origin of feathers minimally back to 175 million years ago — about 25 million years before the first generally acknowledged bird, Archaeopteryx.

Recent discoveries of feathers in ornithischian dinosaurs hinted that they are a character of dinosaurs as a whole.

Another startling discovery showed that even pterosaurs had four kinds of feather, apparently similar in form with those of dinosaurs, their closest relatives.

“The oldest bird is still Archaeopteryx first found in the Late Jurassic of southern Germany in 1861, although some species from China are a little older,” said University of Bristol’s Professor Mike Benton, lead author of the paper.

“Those fossils all show a diversity of feathers: down feathers over the body and long, vaned feathers on the wings. But, since 1994, paleontologists have been contending with the perturbing discovery, based on hundreds of amazing specimens from China, that many dinosaurs also had feathers.”
http://www.sci-news.com/biology/feather ... 07256.html

User avatar
Abdul Alhazred
Posts: 76130
Joined: Mon Jun 07, 2004 1:33 pm
Title: Yes, that one.
Location: Chicago

Re: Perpetual dinosaur thread

Post by Abdul Alhazred » Sun Aug 04, 2019 1:56 am

So it would be more correct for me to say they found a dinosaur-like dinosaur. :mrgreen:
Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
Any man writes a mission statement spends a night in the box.
-- our mission statement plappendale

User avatar
Witness
Posts: 21282
Joined: Thu Sep 19, 2013 5:50 pm

Re: Perpetual dinosaur thread

Post by Witness » Sun Aug 04, 2019 2:04 am

That's the ticket.

User avatar
Anaxagoras
Posts: 24691
Joined: Wed Mar 19, 2008 5:45 am
Location: Yokohama/Tokyo, Japan

Re: Perpetual dinosaur thread

Post by Anaxagoras » Mon Aug 05, 2019 3:54 am

It would be hard to argue that a sauropod like a brachiosaurus is a bird.
A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare

User avatar
Abdul Alhazred
Posts: 76130
Joined: Mon Jun 07, 2004 1:33 pm
Title: Yes, that one.
Location: Chicago

Re: Perpetual dinosaur thread

Post by Abdul Alhazred » Mon Aug 05, 2019 11:41 am

Dinosaur sighting not far from where I live. 8)

Image

Damn dinosaurs shit all over everything. :evil:
Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
Any man writes a mission statement spends a night in the box.
-- our mission statement plappendale

User avatar
Witness
Posts: 21282
Joined: Thu Sep 19, 2013 5:50 pm

Re: Perpetual dinosaur thread

Post by Witness » Tue Aug 06, 2019 12:27 am

There is of course no hard transition between non-avian dinosaurs and birds. Remember that Archeopterix himself would have been classified as one more boring small dino if the feathers hadn't left an imprint (in the marvelous Solnhofen limestone, used for lithography). And that the palaeontological record is always lacunar.

An example: Anchiornis ("almost bird", ha ha!)

Image

Image

Image

Image
The small, feathered "dino-birds" dug up in China's Liaoning fossil beds have proved an endless source of confusion. The latest genus to ruffle the feathers of paleontologists is Anchiornis, a tiny dinosaur (not a bird) with unusually long front arms and feathers on its front limbs, hind limbs, and feet. Despite its similarity to Microraptor--another four-winged dino-bird--Anchiornis is believed to have been a troodont dinosaur, and thus a close relative of the much bigger Troodon. Like other feathered dinosaurs of its kind, Anchiornis may have represented an intermediate stage between dinosaurs and modern birds, though it may also have occupied a side branch of avian evolution destined to die out with the dinosaurs.

Recently, a team of scientists analyzed the fossilized melanosomes (pigment cells) of a specimen of Anchiornis, resulting in what may be the first full-color depiction of an extinct dinosaur. It turns out that this dino-bird had an orange, mohawk-like crest of feathers on its head, alternating white- and black-striped feathers running along the width of its wings, and black and red "freckles" spotting its beaked face. This has provided considerable grist for paleo-illustrators, who now have no excuse for depicting Anchiornis with scaly, reptilian skin!