http://blogs.smithsonianmag.com/dinosaur/2012/08/how-domed-dinosaurs-grew-up/ Where Paleontology Meets Pop Culture Sat, 22 Dec 2012 16:48:38 +0000 hourly 1 http://wordpress.org/?v=3.4 http://blogs.smithsonianmag.com/dinosaur/2012/08/how-domed-dinosaurs-grew-up/comment-page-1/#comment-6862 Matt Martyniuk Mon, 20 Aug 2012 16:46:53 +0000 http://blogs.smithsonianmag.com/dinosaur/?p=8292#comment-6862 Has anyone suggested that it was only the bony cores of the spikes being resorbed, and that the keratin covering remained the same size or even grew larger? I could imagine this being a weight-saving adaptation. Has anyone suggested that it was only the bony cores of the spikes being resorbed, and that the keratin covering remained the same size or even grew larger? I could imagine this being a weight-saving adaptation.

]]> http://blogs.smithsonianmag.com/dinosaur/2012/08/how-domed-dinosaurs-grew-up/comment-page-1/#comment-6852 Ian Fri, 17 Aug 2012 23:42:56 +0000 http://blogs.smithsonianmag.com/dinosaur/?p=8292#comment-6852 If the were butting heads as adults, isn't it likely that the spikes would get broken off anyway? So it makes sense to lose them, though it doesn't explain why juveniles would have them in the first place. If the were butting heads as adults, isn’t it likely that the spikes would get broken off anyway? So it makes sense to lose them, though it doesn’t explain why juveniles would have them in the first place.

]]> http://blogs.smithsonianmag.com/dinosaur/2012/08/how-domed-dinosaurs-grew-up/comment-page-1/#comment-6851 Anonymous Fri, 17 Aug 2012 23:07:45 +0000 http://blogs.smithsonianmag.com/dinosaur/?p=8292#comment-6851 You neglected to mention that though Schott and Evans found resorption pits in the older Stegoceras individuals and a similar pattern of nodes across individuals, they also found that the hypothesized change in the temporal fenestrae in Goodwin and Horner's paper was not observed in Stegoceras. Additionally, the authors noted that the growth of Stegoceras does not undergo the extreme shifts in ontogeny that have been hypothesized for Dracorex/Stygimoloch/Pachycephalosaurus, the growth of the squamosals and nodes/horns in Stegoceras remaining isometric through life. You neglected to mention that though Schott and Evans found resorption pits in the older Stegoceras individuals and a similar pattern of nodes across individuals, they also found that the hypothesized change in the temporal fenestrae in Goodwin and Horner’s paper was not observed in Stegoceras. Additionally, the authors noted that the growth of Stegoceras does not undergo the extreme shifts in ontogeny that have been hypothesized for Dracorex/Stygimoloch/Pachycephalosaurus, the growth of the squamosals and nodes/horns in Stegoceras remaining isometric through life.

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