Tainoceratoidea Hyatt 1883

Superfamily Tainoceratoidea Hyatt, 1883 Diagnosis Superfamily of the suborder Tainoceratina with a discoidal to pachyconic, subinvolute or subevolute conch. Whorl profile always with midventral longitudinal groove; in phylogenetically early species subquadrate with a distinct ventrolateral shoulder and a distinct umbilical margin, in derived species polygonal with divergent or convergent flanks. Dorsal whorl zone always very small. Sculpture with rows of ventrolateral nodes, in some species with rows of nodes on the flank. Septa simply domed; suture line depending on the whorl profile, usually with shallow lobes and low saddles (from Korn 2025). Included family Tainoceratidae Hyatt, 1883 (Carboniferous to Triassic). Remarks A detailed discussion of superfamily Tainoceratoidea has been given by Korn (2025).