The shape of this structure can vary from oval to pentagonal, and its edge may exhibit differing thickness. The apical disc features five gonopores, and there are hydropores located within the sinuous groove. The petal-like parts are robust and taper towards their outer ends. The basicoronal plates are arranged in a star-like pattern, with ambulacral plates that project outward. The periproct is positioned in the oral region and has a radial elongation, located between the peristome and the back edge, opening between the first and second paired post-basicoronal plates.