Differs from the type species of Monostychia, Fellaster and Ammotrophus in having only a single pair of post-basicoronal interambulacral plates on the oral surface. Monostychia and Ammotrophus further differ in having their periproct oral in position. In addition, Fellaster has no naked furrow running from the periproct to basicoronal plates. Differs from fossulasterids in having broad and well-developed combed areas throughout.
Mortensen, T. 1948. A Monograph of the Echinoidea IV.2 Clypeasteroida. C. A. Reitzel, Copenhagen.
J. W. Durham 1955. Classification of clypeasteroid echinoids. University of California Publications in Geological Sciences 31(4), 73-198.