Derivative strict reduced consensus tree of ankylosaurian relationships.

Zhejiangosaurus, Niobrarasaurus, Hungarosaurus, Actarctopelta, Anoplosaurus, Polacathus rodgwickensis, and Stegopelta were pruned a posteriori to improve resolution. Values above nodes are bootstraps, and values below nodes are Bremer support values. See text for further details. [planned for page width].