Dodatak:Popis vrpčara, M
- Macronemertes Verrill, 1873
- Malacobdella
- Malacobdella Blainville, 1827
- Malacobdellidae
- Malacobdellidae Blanchard, 1847
- Meckelia
- Meionemertes
- Meionemertes Gibson, 1986
- Mergonemertes
- Mergonemertes Brinkmann, 1917
- Mesarmaueria Korotkevich, 1955
- Micconemertes
- Micconemertes Gibson, 1997
- Micrella
- Micrella
- Micrellides
- Micrellides Gibson, 1985
- Micrura
- Micrura Ehrenberg, 1871
- Micrurides
- Micrurimorpha
- Micrurimorpha Korotkevich, 1980
- Micrurina
- Micrurina Stiasny-Wijnhoff, 1942
- Micrurinella
- Micrurinella Friedrich, 1960
- Minutanemertes
- Minutanemertes Senz, 1993
- Mixolineidae
- Mixolineidae
- Mixolineus
- Mixolineus
- Mononemertes
- Mononemertes Coe, 1926
- Monopora
- Monostilifera
- Monostilifera
- Monostilifera incertae sedis
- Myorhynchonemertes
- Myorhynchonemertes Senz, 1997