A few problems here.
Raven and Maidment 2017 have produced a phylogeny of the clade Stegosauria (Fig. 1). Unfortunately it splits stegosaur proximal outgroups (in the large reptile tree (LRT, subset in Fig. 2) from stegosaurs. It splits stem or basal ankylosaurs from derived ankylosaurs. And it supports a clade, the Thyreophora, that was found to be paraphyletic in the LRT. Finally, it nests Laquintasaurus with Scutellosaurus, contra the LRT.
Raven and Maidment appear to have chosen outgroups
for Stegosauria instead of letting a larger gamut analysis choose them. So, once again, taxon exclusion lessens the effectiveness of and confidence in a hypothesis.
Raven TJ and Maidment SCR 2017. A new phylogeny of Stegosauria (Dinosauria, Ornithischia). Palaeontology 2017:1–8.
Barrett PM, Butler RJ, Mundil R, Scheyer TM, Irmis RB, Sánchez-Villagra MR (2014) A palaeoequatorial Ornithischian and new constraints on early dinosaur diversification. Proceedings of the Royal Society B 281(1791): 20141147. http://dx.doi.org/10.1098/rspb.2014.1147