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Any of various herbivorous ornithischian dinosaurs of the group Stegosauria of the Jurassic and Cretaceous Periods, having rows of upright plates or spikes on the back, spikes on the tail, and a small head with a beaked mouth. Also called stegosaur.

[From New Latin Stegosauria, group name, from Stegosaurus, type genus; see stegosaurus.]

steg′o·saur′i·an adj.


(Palaeontology) a variant of stegosaur
having the characteristics of a stegosaur
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References in periodicals archive ?
In stegosaurian ichnotaxa such as Stegopodus Lockley and Hunt, 1998 and Deltapodus Whyte and Romano, 2001, pes prints are mesaxonic, with a triangular contour and three digit impressions forward-oriented (sensu Lockley and Hunt, 1998; Whyte and Romano, 2001).
We describe a new stegosaurian dinosaur from the Upper Jurassic of Portugal that challenges this traditional view," he added.
In this paper we describe preliminarily new stegosaurian material from the Tithonian-Berriasian Villar del Arzobispo Formation cropping out near the villages of La Yesa and Baldovar (Valencia province, eastern Spain).
Brusatte and collaborators examine the evolution of large-bodied theropod dinosaurs in Asia during the Jurassic and Cretaceous; and Company and co-workers contribute to our knowledge of the stegosaurian record in the Jurassic-Cretaceous transitions in the Iberian Peninsula.