H.E.S. Clark and McKnight, 1996: 205, 2001: 45
Diagnosis. Disk weakly pentagonal with marginal series arranged into unusual hastate (i.e., arrow-shaped) formation near arm-tips. Interradial marginal plates small, jumbled. Abactinal plates covered by granules. Two types of pedicellariae, one with slender, tapering blades and broad, fan-like blades present.