Re: [dinosaur] Gigantspinosaurus shoulder spikes orientation

[Poekilopleuron <dinosaurtom2015@seznam.cz>]

Thank you, this is very interesting. I wonder to what degree were these excessive structures a mean of sexual selection (or a display device) and to what degree it was a fully functional defensive structure? Thank you, Tom

---------- PÅvodnà e-mail ----------
Od: Tyler Greenfield <tgreenfield999@gmail.com>
Komu: Poekilopleuron <dinosaurtom2015@seznam.cz>, dinosaur-l@usc.edu
Datum: 10. 5. 2021 20:17:22
PÅedmÄt: Re: [dinosaur] Gigantspinosaurus shoulder spikes orientation

I put together this diagram of possible orientations of the parascapular spines in Yingshanosaurus, which is closely related to Gigantspinosaurus and might even be a junior synonym of it. The flattened bases of the spines almost certainly rested flat against the scapula either way.

On Mon, May 10, 2021 at 11:17 AM Poekilopleuron <dinosaurtom2015@seznam.cz> wrote:

Good day!

Is it known yet, what was the life position and orientation of stegosaur _Gigantspinosaurus sichuanensis_ shoulder spikes? Thank you in advance! Tom