Planktonemertidae
Planktonemertidae is a family of worms belonging to the order Polystilifera.
Genera:Crassonemertes Brinkmann, 1917Mergonemertes Brinkmann, 1917Mononemertes Coe, 1926Neuronemertes Coe, 1926Planktonemertes Woodworth, 1899Plenanemertes Coe, 1954Tononemertes Coe, 1954