Nemertodermatida is a class of Xenacoelomorpha, comprising 18 species of millimetre-sized turbellariform, mostly interstitial worms.

Taxonomy

The order Nemertodermatida contains two families with 6 genera. The high level of cryptic diversity in this meiofauna group however implies that the number of nemertodermatid taxa may be underestimated.

Ascopariidae

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