The systematic position of the Lower Cretaceous heteromorphic ammonite <Emphasis Type="Italic">Pictetia</Emphasis> Uhlig, 1883

The heteromorphic ammonite genus Pictetia has previously been included in the Lytoceratidae. A reassessment of literature data and a detailed analysis of the suture shows that Pictetia lacks a septal lobe as well as a bifid internal lobe and lateral lobe, all features indicative of the Lytoceratidae. This and the quadrilobate suture line, combined with the loose coiling of the shell, indicate that it should be included in the polyphyletic suborder “Ancyloceratina”. Any further systematic assessment is impossible at the moment.