Howarth M. Treatise Online no. 128: Part L, Revised, Volume 3B, Chapter 2: Systematic Descriptions of the Jurassic and Cretaceous Phylloceratoidea, Boreophylloceratoidea, and Aequiloboidea. TREON. Published online January 13, 2020. doi:10.17161/to.vi.13358