1. Thyreophorans include various subgroups, including the suborders Ankylosauria and Stegosauria . 2. It is a member of the Stegosauria . 3. Ossified sternal plates have never been found with Stegosauria and perhaps the sternum was completely absent. 4. Thus defined, the Stegosauria are by definition the sister group of the Ankylosauria within the Eurypoda. 5. He placed the Stegosauria and Ornithopoda in the Ornithischia, and the Theropoda and Sauropoda in the Saurischia. 6. However, the species was later considered a " nomen dubium " in both reviews of Stegosauria . 7. A study by Maidment indicated that " Gigantspinosaurus " is the most basal known member of the Stegosauria . 8. "' Stegosauridae "'is a clade of Thyreophoran dinosaurs ( armoured dinosaurs ) within the suborder Stegosauria . 9. Even though phylogenetic analyses recognize " Paranthodon " as a stegosaurid, the type material actually bears no synapomorphies of Stegosauria . 10. Dinosaurs such as " Ankylosaurus ", as well as other Thyreophora ( armoured dinosaurs such as Ankylosauria and Stegosauria ), grew thick club.
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