De orde Ulvales Blackman & Tansley kent 8 families en 7 geslachten incertae sedis.
De families:
| Bolbocoleonaceae O'Kelly & Rinkel | Jaoaceae Fan |
Ulvaceae J.V.Lamour. ex Dumort. |
| Capsosiphonaceae V.J.Chapman |
Kornmanniaceae L.Golden & K.M.Cole |
Ulvellaceae Schmidle |
| Cloniophoraceae A.L.Carlile, C.J.O'Kelly & A.R.Sherwood | Phaeophilaceae D.F. Chappell et al. |
De geslachten incertae sedis:
| Ctenocladus Borzì | Heterogonium P.-A.Dangeard | Pseudendoclonium Wille |
| DilabifilumTschermak-Woess | Lithotrichon Darienko & Pröschold | |
| Halofilum Darienko & Pröschold | Paulbroadya Darienko & Pröschold |
