The discovery of this specimen lead to several new revelations in the fossil records questioning the preservation of small-bodied organisms along with the evolution of early pachycephalosaurs.

Acrotholus' discovery further implicates the diversity of small bodied dinosaurs which may not have survived the fossil record, suggesting a much more complex ecology in the late Mesozoic era.

Compared to Stegoceras validum and later Campanian pachycephalosaurids, the dorsally convex frontonasal boss is short and not separated with grooves from the anterior supraorbital lobe.

[5] Wannanosaurus yansiensis Colepiocephale lambei Hanssuesia sternbergi Stegoceras novomexicanum Stegoceras validum Goyocephale lattimorei Homalocephale calathocercos Tylocephale gilmorei Foraminacephale brevis Amtocephale gobiensis Acrotholus audeti Prenocephale prenes Alaskacephale gangloffi Pachycephalosaurus wyomingensis Sphaerotholus buchholtzae Sphaerotholus goodwini The relatively dome shape of the holotype indicates the specimen was an adult or nearing its completion of its adult transition.

Juvenile Pachycephalosaurs wyomingensis have characteristics of nodes on the squamosal nearly identical to holotype fossils of Dracorex hogwartsia and Stygimoloch spinifer.

[6] Comparison of bone development in flat domed taxa from Asia have found patterns indicating active growth at the time of death.

[3] Closer analysis of related taxa, Stegoceras novomexicanium found holotype specimen to be juvenile in characteristics, with visible frontal-parietal sutures, small rounded tubercles on the dome, and vascularized internal skull bones.

However, such theories have been countered due to the relatively large energy investment required and the morphological changes that occur in the species life span.

[2][9][10] Morphological comparisons with modern ungulates practicing head butting have found similar dome shaped structures used in combat.

In addition, tubular struts in the dome of the related taxa, Stegoceras, were comparable to pneumatized frontal sinuses found in some head-striking mammals.

[10] Analysis of pachycephalosaurid skulls by Mallon and Evans, suggest many species frequently inhabited coastal areas contrary to their terrestrial lifestyle.

[11] The Milk River Formation, where A. audeti is found, is home to many other extinct species in the late Cretaceous including other dinosaurs like Saurornitholestes and mammals like Alphadon.