The generic name means Texas + "head" (kephale in Greek) in reference to its place of discovery, and the specific name langstoni honors Wann Langston.

[1] These distinguishing characteristics were later questioned by Jasinski and Sullivan, who considered these traits to be based on misrepresentations or misinterpretations of the holotype specimen's morphology.

[7] In 2024, description of a Stegoceras specimen also from the Aguja Formation included the holotype of Texacephale in its morphometric analysis, where it was also found to be very similar to S. validum but not to the extent to which the authors of the study outright referred it to that species.

[1] In contrast to today's dry, desert environment, the Big Bend paleoenvironment was a wet, coastal lowland on the edge of the Western Interior Seaway during the Campanian.

[1] Stegoceras Gravitholus Colepiocephale Texacephale Hanssuesia Sphaerotholus brevis S. goodwini S. edmontonense S. bucholtzae Alaskacephale Pachycephalosaurus Stygimoloch Dracorex Tylocephale Prenocephale Homalocephale Goyocephale Wannanosaurus