 Separation of Turrilitoidea along with Ptychoceratoidea and Scaphatoidea into a different suborder, Turrilitina, was proposed by Beznosov and Mikhailova in 1983 however this view is not accepted by most authors.Some, such as the eponymous "Turrilites", coiled helically, like an auger shell, while others, such as "Hamites", had shells with long straight sections, while the one-of-a-kind "Nipponites" coiled in a way so as to appear as a ball of knots.As with other ammonites, the last of the Turrilitoidea had perished by the end of the Cretaceous during the Cretaceous–Paleogene extinction event.