Ophiacanthida

Ophiacanthida is an order of echinoderms belonging to the class Ophiuroidea.

The order contains two suborders, Ophiodermatina and Ophiacanthina, which include the following families:
 * Ophiodermatina, 1867
 * Ophiodermatidae
 * Ophiomyxidae
 * Ophiopezidae
 * Ophiocomidae
 * Ophiacanthina O'Hara, Hugall, Thuy, Stöhr & Martynov, 2017
 * Clarkcomidae
 * Ophiacanthidae
 * Ophiobyrsidae
 * Ophiocamacidae
 * Ophiopteridae
 * Ophiotomidae
 * Ophiojuridae