_- Actinocyclidae
- Aegiridae
- Aeolidiidae
- Akiodorididae
- Apataidae
- Arminidae
- Babakinidae
- Bathydorididae
- Bornellidae
- Cadlinidae
- Calmidae
- Calycidorididae
- Charcotiidae
- Chromodorididae
- Corambidae
- Coryphellidae
- Cuthonellidae
- Cuthonidae
- Dendrodorididae
- Dendronotidae
- Dironidae
- Discodorididae
- Dorididae
- Doridomorphidae
- Dotidae
- Embletoniidae
- Eubranchidae
- Facelinidae
- Fionidae
- Flabellinidae
- Glaucidae
- Goniaeolididae
- Goniodorididae
- Gymnodorididae
- Hancockiidae
- Heroidae
- Hexabranchidae
- Lomanotidae
- Madrellidae
- Mandeliidae
- Notaeolidiidae
- Okadaiidae
- Onchidorididae
- Phyllidiidae
- Phylliroidae
- Pinufiidae
- Piseinotecidae
- Pleurolidiidae
- Polyceridae
- Proctonotidae
- Pseudovermidae
- Samlidae
- Scyllaeidae
- Tergipedidae
- Tethydidae
- Trinchesiidae
- Tritoniidae
- Unidentidae