 Currently , Paranthodon is classified as a <unk> related to Stegosaurus , Tuojiangosaurus , and <unk> . However , when Broom assigned the name Palaeoscincus africanus to the Paranthodon fossils , he classified them as an ankylosaurian . This classification was later changed by Nopcsa , who found that Paranthodon best resembled a stegosaurid ( before the group was truly defined ) . Coombs ( 1978 ) found Paranthodon to be an ankylosaurian , like <unk> , naming it <unk> <unk> sedis . However , in reviews by <unk> in 1981 , it was found to instead represent a stegosaurid from the Late Cretaceous . Multiple phylogenetic analyses have placed Paranthodon in Stegosauria , and often in Stegosauridae . A 2010 analysis including nearly all species of stegosaurians found that Paranthodon was outside Stegosauridae , and in a <unk> with Tuojiangosaurus , Huayangosaurus , <unk> , <unk> , and <unk> . However , when the latter two genera were removed , Paranthodon grouped with Tuojiangosaurus just outside Stegosauridae , and Huayangosaurus grouped with <unk> in <unk> . Below is the analysis with all included genera . 
