Of or belonging to the Spinigrada, a class of echinoderms which move by means of spines or spinous processes.

Of, relating to, or characteristic of the class Ophiuroidea; of an ophiuroid.

Of or relating to brittlestars; = ophiuroid, adj.

Of or relating to the family Ophiuridae or the class Ophiuroidea; of an ophiurid.