Join for FREE
It only takes a minute!
Zeiss - Always on the lookout for something special – Shop now

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Dinosaurs as ancestors of birds...

Thread Tools Rate Thread
Old Wednesday 24th October 2018, 10:46   #1
Peter Kovalik
Registered User
Peter Kovalik's Avatar

Join Date: Oct 2009
Location: Sp. Hrhov
Posts: 2,939
Dinosaurs as ancestors of birds...

Kazuto KAWAKAMI, Masaki EDA. Dinosaurs as ancestors of birds, and birds as descendants of dinosaurs. Japanese Journal of Ornithology 2018 Volume 67 Issue 1 Pages 7-23.


The origin of birds has been a fundamental and challenging subject in ornithology since the discovery of Archaeopteryx. Although the phylogenetic relationship between birds and crocodiles has been recognized since the beginning of discussion, researchers were unable to reached a consensus as to which was the ancestor of modern birds. Pterosauria, Crocodilia, Thecodont, Ornithischia, and Theropoda have all been put forward as the ancestors of birds. Recent paleontological studies have clarified that birds are derived from a clade of Maniraptora in the clade Coelurosauria among the Theropod dinosaurs. Fossil evidence has demonstrated that birds share several features with Coelurosauria dinosaurs, such as bipedal locomotion, fork-shaped furcula, air sacs, and laterally flexing wrists. Embryological and molecular biological evidence correspond with this view. Today, birds are phylogenetically defined as avian dinosaurs, and other dinosaurs are defined as non-avian dinosaurs. This implies that dinosaurs did not become extinct at the end of the Cretaceous period, 66 million years ago. Feathered dinosaurs represent one of the most remarkable topics of recent paleontology. Various dinosaurs with contour feathers have been found among the Coelurosauria, while simple filament-like protofeathers have been detected in an even wider range of taxa, including the Ornithischia. Furthermore, flightless Ornithomimus edmontonicus has been shown to have possessed pennaceous wings. These findings imply that non-avian dinosaurs evolved feathers and wings for reasons unrelated to flight, perhaps for display. While toothless beaks, the pygostyle, shortened tails, and keeled sternums are considered to have evolved for flight, bipedalism, air sacs, and furcula are considered to be cases of exaptation. The fields of ornithology and paleontology may contribute to each other based on the close relationships between birds and dinosaurs. Collaboration between these two fields is essential for their future development.
Peter Kovalik is offline  
Reply With Quote
Old Monday 3rd June 2019, 06:37   #2
Fred Ruhe
Registered User

Join Date: Feb 2010
Location: Diemen
Posts: 1,513
Kazuto Kawakami & Makoto Eda, 2018

Dinosaurs as ancestors of birds, and birds as descendants of dinosaurs.

Japanese Journal of Ornithology 67(1): 7-23

Free pdf:

Fred Ruhe is online now  
Reply With Quote

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
How dinosaurs became birds Fred Ruhe Bird Paleontology 0 Tuesday 14th August 2018 06:27
Ancestors of living birds Crusty Bird Taxonomy and Nomenclature 2 Friday 25th May 2018 14:26
Dinosaurs and Birds? Accipiter91 Birds & Birding 6 Tuesday 14th November 2006 08:31
Dinosaurs and birds OwlTalon Birds & Birding 1 Tuesday 7th November 2006 12:20
Are Dinosaurs Really the Ancestors of Birds? Jane Turner Birds & Birding 3 Friday 28th November 2003 10:35

Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.16247892 seconds with 14 queries
All times are GMT. The time now is 18:27.