By far the largest group of generalised Cymatium species, with quite small to moderately large shells (30 to 200 mm high), periostraca bearing fringed axial lamellae on many prominent axial costae, varices present all down the teleoconch at each 240° growth pause in most species (but irregular, or only the terminal varix present, in a few species), and an operculum with an abapically terminal nucleus. This definition incorporates into C. (Monoplex) the group of smaller species, related to C. vespaceum and C. exaratum. for which IREDALE (1936: 307) proposed Cabestanimorpha but which, in recent years, most authors have included in C. (Turritriton).