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Re: [dinosaur] Which dinosaurs were feathered

The real trick: finding some Late Triassic lacustrine sites with dinosaurs in them. That will be VERY informative!!

On Thu, Feb 9, 2017 at 8:54 AM, Nickolas Brand <brandn@appstate.edu> wrote:

Hello Poekilopleuron,

This is really exciting, and a great question.

To me, there are really two contrasting pieces if evidence. Primarily, you have the Kulindadromeus find which suggests feathers as a basal trait if dinosauria (or twice evolved if you are of that camp). On the flip side you have the abundance of dinosaur fossils found without evidence of feathers.

My best educated guess would say that most theropods probably had feather integument in varying degrees. I would also hypothesize that feathers were less useful to the large bodied herbivorous dinosaurs for the most part, and they would either be lost early in those clades, or retained as a juvenile only trait.

Unfortunately those are just slightly evidenced conjecture. As far as Im aware, we do not have the evidence to point strongly either way.

- Nickolas A. Brand

On Feb 9, 2017 8:34 AM, "Poekilopleuron" <dinosaurtom2015@seznam.cz> wrote:
Good day,

given that feathery integument could be a synapomorphy for Dinosauria, which other clades of dinosaurs you think could be found with preserved fibrous/feather integument? I mean, except those that already "proved" to have them, like ornithomimosaurs, tyrannosauroids, deinonychosaurs etc. Is there a possibility of finding such integument in dinosaurs like _Torvosaurus_, _Coelophysis_ or even _Iguanodon_ and _Pachycephalosaurus_? Thank you in advance, Tom


Thomas R. Holtz, Jr.
Email: tholtz@umd.edu         Phone: 301-405-4084
Principal Lecturer, Vertebrate Paleontology

Office: Geology 4106, 8000 Regents Dr., College Park MD 20742

Dept. of Geology, University of Maryland

Phone: 301-405-6965
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Faculty Director, Science & Global Change Program, College Park Scholars

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