Sykidiacaeae family accepted

Cyclocrinales order accepted

Aegagropilopsis Boed. genus doubtful

Ignatiaceae family accepted

Symbiochlorum S.Q.Gong & Z.Y.Li, 2018 genus doubtful

Ulvales order accepted

Pseudotrinocladus O.N.Dragastan, 1978 genus doubtful

Ulotrichales order accepted

Cladophorales order accepted

Codiolales order accepted

Dasycladales order accepted

Siphonocladales order accepted

Desmochloris S.Watanabe, N.Kuroda & F.Maiwa, 2001 genus accepted

Bolbocoleon E.G.Pringsh. genus doubtful

Siphonales order synonym

Scotinosphaerales order accepted

Ulothrichopsis Wichmann genus accepted

Bryopsidales order accepted

Trentepohliales order accepted

Oltmannsiellopsidales order accepted