Callithamnion flexuosum (C.Agardh) C.Agardh, 1828 species synonym

Pleonosporium tohyamanum species accepted

Pleonosporium pusillum species accepted

Pleonosporium rhizoideum species accepted

Pleonosporium squarrosum species accepted

Pleonosporium vancouverianum species accepted

Pleonosporium mexicanum E.Y.Dawson species accepted

Pleonosporium boergesenii (A.B.Joly) R.E.Norris species accepted

Mesothamnion boergesenii A.B.Joly species synonym

Pleonosporium globuliferum species accepted

Pleonosporium pinnatum species accepted

Pleonosporium complanatum W.R.Taylor species accepted

Pleonosporium kobayashii species accepted

Pleonosporium borreri (J.E.Sm.) Nägeli species accepted

Callithamnion tetricum var. minus C.Agardh, 1828 variety synonym

Callithamnion borreri (Smith) C.Agardh species synonym

Callithamnion seminudum C.Agardh, 1828 species synonym

Pleonosporium squarrulosum species accepted

Pleonosporium dasyoides species synonym

Pleonosporium polycarpum species synonym

Pleonosporium pygmaeum species synonym

Pleonosporium flexuosum (C.Agardh) Bornet ex De Toni species accepted

Ceramium miniatum C.Agardh, 1824 species synonym

Ceramium flexuosum C.Agardh, 1824 species synonym

Pleonosporium flexuosum (C Agardh) Bornet species synonym

Pleonosporium abysicola species synonym

Corynospora pinnata J.Agardh, 1851 species synonym

Corynospora flexuosa (C.Agardh) J.Agardh species synonym

Mesothamnion distichum (Børgesen) Halos species doubtful