Gnathophiurina

Amphiuridae (commonly called long-armed burrowing brittle stars or burrowing brittle stars) are a large family of brittle stars of the suborder Gnathophiurina. Some species are used to study echinoderm development (e.g. Amphipholis kochii and Amphioplus abditus) and bioluminescence (the dwarf brittle star, Amphipholis squamata).

Ophiotrichidae are a family of brittle stars within the suborder Gnathophiurina.

Amphilepididae are a small family of brittle stars of the suborder Gnathophiurina. It contains two genera, Amphicutis and Amphilepis Amphicutis Amphilepis

The Gnathophiurina are a group of Ophiuroidea mostly treated as suborder (but at first as an order Gnathophiurida, and sometimes as infraorder of Ophiurina or not used at all).