|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|J. C. Parish and P. M. Barrett 2004||The genus can be diagnosed by the presence of a single autapomorphy: a distinctive pattern of grooves on the dorsal skull roof, forming a truncated “Y” shape that separates three flat polygonal areas of remodelled bone. In addition, the combined presence of this feature and of three separate exits for the hypoglossal nerve is unique among ankylosaurs.|