'the origin') is an extinct genus of thescelosaurine thescelosaurid ornithischian dinosaurs from the 'mid'-Cretaceous Cedar Mountain Formation (Mussentuchit Member) of Utah, United States.

[1] The Fona fossil material was discovered in multiple different localities of the Mussentuchit Member of the Cedar Mountain Formation in Emery County of Utah, United States.

[1] Prior to the formal naming of Fona, the fossil material was reported in several conference abstracts[2][3][4][5][6] and academic papers without thorough description, where it was typically mentioned as belonging to an orodromine thescelosaurid.

This story recalls the associated skeletons of two Fona subadults—which may have been siblings or a male/female pair that were fossilized—as well as efforts to recognize the equality of men and women and decolonize paleontology.

The specific name, herzogae, honors Lisa Herzog, the discoverer of the Mini Troll locality from which several Fona specimens are known, and her contributions to fossil conservation.