Fisher, 1911: 422; 1919: 298; Macan, 1938: 387; McKnight, 1973: 189; H.E.S. Clark in Clark & McKnight, 2001: 62.
Diagnosis. Body strongly stellate. Superomarginal plate series strongly abut over midline on arms. Abactinal, marginal, and actinal plate surfaces smooth, bare and lacking accessories. Plate surfaces flush. Small glassy granules embedded in abactinal plates. Furrow armature flush with adjacent actinal plates.