-
Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.
Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
What a shame! ;) (1 Viewer)
- Thread starter fugl
- Start date
Fred Ruhe
Well-known member
Phil R. Bell, Nicolás E. Campione, W. Scott Persons, Philip J. Currie, Peter L. Larson, Darren H. Tanke & Robert T. Bakker (2017)
Tyrannosauroid integument reveals conflicting patterns of gigantism and feather evolution.
Biology Letters 2017 13 (6): 20170092
DOI: 10.1098/rsbl.2017.0092
http://rsbl.royalsocietypublishing.org/content/13/6/20170092
Free pdf:
http://rsbl.royalsocietypublishing.org/content/roybiolett/13/6/20170092.full.pdf
Abstract:
Recent evidence for feathers in theropods has led to speculations that the largest tyrannosaurids, including Tyrannosaurus rex, were extensively feathered. We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large-bodied forms possessed scaly, reptilian-like skin. Body size evolution in tyrannosauroids reveals two independent occurrences of gigantism; specifically, the large sizes in Yutyrannus and tyrannosaurids were independently derived. These new findings demonstrate that extensive feather coverings observed in some early tyrannosauroids were lost by the Albian, basal to Tyrannosauridae. This loss is unrelated to palaeoclimate but possibly tied to the evolution of gigantism, although other mechanisms exist.
Enjoy,
Fred
Tyrannosauroid integument reveals conflicting patterns of gigantism and feather evolution.
Biology Letters 2017 13 (6): 20170092
DOI: 10.1098/rsbl.2017.0092
http://rsbl.royalsocietypublishing.org/content/13/6/20170092
Free pdf:
http://rsbl.royalsocietypublishing.org/content/roybiolett/13/6/20170092.full.pdf
Abstract:
Recent evidence for feathers in theropods has led to speculations that the largest tyrannosaurids, including Tyrannosaurus rex, were extensively feathered. We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large-bodied forms possessed scaly, reptilian-like skin. Body size evolution in tyrannosauroids reveals two independent occurrences of gigantism; specifically, the large sizes in Yutyrannus and tyrannosaurids were independently derived. These new findings demonstrate that extensive feather coverings observed in some early tyrannosauroids were lost by the Albian, basal to Tyrannosauridae. This loss is unrelated to palaeoclimate but possibly tied to the evolution of gigantism, although other mechanisms exist.
Enjoy,
Fred
Nutcracker
Stop Brexit!
BBC take on Tyrannosaurus with Chris Packham (available until the end of January, probably UK only)
https://www.bbc.co.uk/iplayer/episode/b09ksl99/the-real-t-rex-with-chris-packham
https://www.bbc.co.uk/iplayer/episode/b09ksl99/the-real-t-rex-with-chris-packham
Similar threads
