Kentrosaurus
... that Kentrosaurus had extensive osteodermal covering, forming very elongated spikes?
... that <i id="mwCBs"><b id="mwCBw"><a href="./Kentrosaurus" id="mwCB0" rel="mw:WikiLink" title="Kentrosaurus">Kentrosaurus</a></b></i> <i id="mwCB4">(fossil K. aethiopicus pictured)</i> had extensive <a href="./Osteoderm" id="mwCB8" rel="mw:WikiLink" title="Osteoderm">osteodermal</a> covering, forming very elongated spikes?