Silhouetted size comparison of the dinosaurs mentioned with a human for scale. The largest of this group known is ~3m long

The tentative clade "Parankylosauria" contains the Southern Hemisphere ankylosaurians #Stegouros, #Antarctopelta, #Patagopelta, & #Kunbarrasaurus. These armoured dinos are known from a few specimens combined, but hint at a ghost lineage of southern thyreophorans.

(Diagram by SlvrHwk on Wikimedia)