One study argued that Lituitida (also considered a suborder, Lituitina) was closely related to the proposed order Pallioceratida (or suborder Pallioceratina). Under this hypothesis, they would collectively form the superorder Astrovioidea (or order Astroviida), which was diagnosed based on extensive cameral deposits which partially obliterate the connecting rings. However, the validity of Pallioceratida/Pallioceratina or Astroviodea/Astroviida are not universally accepted.
