Nemertodermatida

Nemertodermatida is a class of Acoelomorpha, 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
The family Ascopariidae Sterrer, 1998 contains two genera.
 * Ascoparia Sterrer, 1998
 * Flagellophora Faubel & Dorjes, 1978

There are 3 species in the family Ascopariidae.

Nemertodermatidae
The family Nemertodermatidae Steinböck, 1930 contains four genera.
 * Meara
 * Nemertinoides
 * Nemertoderma
 * Sterreria

There are 15 species in the family Nemertodermatidae.