Early Phylogeny of the Permian Superfamily Popanoceratoidea Hyatt (Ammonoidea)

This paper discusses the origin of the superfamily Popanoceratoidea Hyatt and substantiates the hypothesis that the suborder Cyclolobina (order Goniatitida) evolved from the family Glaphyritidae Ruzhencev et Bogoslovskaya. The genus Tabantalites Ruzhencev is proposed as an intermediate form between Vidrioceratidae Plummer et Scott and Popanoceratidae Hyatt. The early phylogeny of popanoceratids in the Early Permian is considered in detail (Protopopanoceras → Propopanoceras → Popanoceras, Pamiropopanoceras). Biogeography of Popanoceratoidea is discussed.