Nemertodermatida is a class of Xenacoelomorpha, comprising 18 species of millimetre-sized , mostly interstitial worms.
There are 3 species in the family Ascopariidae.
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| Ascoparia neglecta Sterrer, 1998 | |||
| Ascoparia secunda Sterrer, 1998 | |||
| Flagellophora apelti Faubel & Dorjes, 1978 | |||
There are 15 species in the family Nemertodermatidae.
| Meara stichopi Westblad, 1949 | |||
| Nemertinoides elongatus Riser, 1987 | |||
| Nemertinoides glandulosum Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Nemertinoides wolfgangi Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Nemertoderma bathycola Steinböck, 1930 | |||
| Nemertoderma westbladi (Westblad, 1937) Steinbock, 1938 | |||
| Sterreria boucheti Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria lundini Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria martindalei Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria monolithes Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria papuensis Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria psammicola (Sterrer, 1970) | |||
| Sterreria rubra (Faubel, 1976) | |||
| Sterreria variabilis Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
| Sterreria ylvae Meyer-Wachsmuth, Curini Galletti & Jondelius, 2014 | |||
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