Figure 41 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships

Figure 41. Cladogram manipulation using MacClade. In this example Scutellosaurus* has been positioned as the proximate sister-taxon to the clade Thyreophora. Tree length is calculated to be 229 steps, which is three steps longer than the most parsimonious trees obtained by the analysis of this dataset. The re-positioning of Scutellosaurus, if it could be supported by additional data, might justify a redefinition of the taxon Thyreophoroidea, as indicated on this branch. Note: an additional adjustment, which involves a single step increase (230 steps), positions Jinyunpelta (albeit tentatively =?) as a basal ankylosaurid on the basis of its possession of a tail club (in conformity with Coombs, 1978a).