The genus is distinguished from other closely related genera such as such as Ophiomitrella and Ophiurothamnus by a combination of the following characteristics:[3]
discs with coarse, overlapping disc plates integrated with large, contiguous radial shields, sometimes with spines;
interradial incision shallow, the distal two with widened outer papillae;
small oral and adoral shields, the former distal to the latter and contiguous with the lateral arm plate;
arms curving but not coiling;
3–4 short arm spines, restricted laterally to the arm;
arm spines up to or just exceeding a segment in length;
lowest arm spine semi-hooked;
jaw slit enclosing oral tentacles; and
simple tentacle scale covering small tentacle pore.
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