Phrynophiurida

Gorgonocephalidae is a family of basket stars. They have characteristic many-branched arms. thumb|Arms of Astroboa nuda

Asteronychidae is a family of echinoderms belonging to the order Euryalida.

suborder of echinoderms

Euryalidae is a family of echinoderms belonging to the order Euryalida.

Asteronyx is a genus of echinoderms belonging to the family Asteronychidae.

The Phrynophiurida (formerly called Euryalae) are an order of brittle stars containing the basket stars.

Trichaster is a genus of echinoderms belonging to the family Euryalidae.