The evolution and function of thyreophoran dinosaur scutes: implications for plate function in stegosaurs

From: Paleobiology | Date: April 1, 2005| Author: | Copyright information

Abstract.-The evolution of scutes in thyreophoran dinosaurs, based on Scutelhsaurus, Scelidosaurus, Stegosaurus, and several ankylosaurs, began with small rounded or ovoid structures that typically had slight, anteroposteriorly oriented keels. These scutes were elaborated in two general and overl apping ways: they could flare laterally and asymmetrically beneath the keels that mark the anteroposterior axis, and they could be hypertrophied in their distal growth to produce plates, spikes, and other kinds of ornamentation. Stegosaurus plates and spikes are thus primarily hypertrophied keels of ...

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