Synallactida

Deimatidae is a family of sea cucumbers belonging to the clade Synallactida.

Synallactida is a rankless clade of sea cucumbers, but is referred to as an order. Taxa within Synallactida were previously classified in an order called Aspidochirotida, which was determined to be polyphyletic in 2017.

The Synallactidae are a family of sea cucumbers, part of the order Synallactida.

Synallactes is a genus of sea cucumbers in the family Synallactidae. The type species of this genus is Synallactes alexandri.