FIGURE 6. Phylogenetic relationships of Brachiosaurus and Giraffatitan, produced using PAUP* 4.0b10 on the matrix of Harris (2006) modified by splitting the composite "Brachiosaurus" OTU into two separate OTUs for the two species, having 31 taxa and 331 characters. Strict consensus of 72 most parsimonious trees (length = 791; CI = 0.5196; RI = 0.6846, RC = 0.3557). Three clades forming a node-stem triplet are highlighted: the node-based Titanosauriformes, and the branch-based sister clades Brachiosauridae and Somphospondyli.