Dactyliosolen antarcticus Castracane, 1886 (uncertain > unassessed )
Dactyliosolen tenuijunctus (Manguin) Hasle, 1975 accepted as Rhizosolenia tenuijuncta Manguin, 1960
Guinardia cylindrus (Cleve) Hasle, 1996 accepted as Rhizosolenia cylindrus Cleve, 1897
Guinardia flaccida (Castracane) H.Peragallo, 1892 accepted as Rhizosolenia flaccida Castracane, 1886
Guinardia tubiformis (G.R.Hasle) Hasle, 1996 accepted as Rhizosolenia tubiformis G.R.Hasle, 1975
Proboscia alata (Brightwell) Sundström, 1986 (uncertain > unassessed )
Proboscia inermis (F.Castracane) R.W.Jordan & R.Ligowski, 1991 (uncertain > unassessed )
Proboscia truncata (G.Karsten) Nöthig & Ligowski, 1991 accepted as Rhizosolenia truncata G.Karsten, 1905
Rhizosolenia antennata (Ehrenberg) N.E.Brown, 1920
Rhizosolenia antennata f. semispina Sundström, 1986
Rhizosolenia antennula accepted as Rhizosolenia antennata (Ehrenberg) N.E.Brown, 1920
Rhizosolenia antennula f. semispina accepted as Rhizosolenia antennata f. semispina Sundström, 1986
Rhizosolenia bergonii H.Peragallo, 1892
Rhizosolenia chunii Karsten, 1905 (uncertain > unassessed )
Rhizosolenia crassa Hensen, 1911 (uncertain > unassessed )
Rhizosolenia crassa Schimper, 1905 (uncertain > unassessed )
Rhizosolenia curvata Zacharias, 1905
Rhizosolenia cylindrus Cleve, 1897 (uncertain > unassessed )
Rhizosolenia cylindrus Ostenfeld in Ostenfeld & Knudsen, 1898 (1899) (uncertain > unassessed )
Rhizosolenia flaccida Castracane, 1886 (uncertain > unassessed )
Rhizosolenia hebetata Bailey, 1856
Rhizosolenia hebetata f. semispina (Hensen) Gran, 1908 accepted as Rhizosolenia semispina Hensen, 1887
Rhizosolenia imbricata (Cleve) Margalef, 1951 accepted as Rhizosolenia shrubsolei Cleve, 1881
Rhizosolenia imbricata Brightwell, 1858
Rhizosolenia longiseta Levander, 1904 (uncertain > unassessed )
Rhizosolenia polydactyla Castracane, 1886 (uncertain > unassessed )
Rhizosolenia polydactyla f. polydactyla
Rhizosolenia rhombus Karsten, 1905 (uncertain > unassessed )
Rhizosolenia semispina Hensen, 1887 (uncertain > unassessed )
Rhizosolenia shrubsolei Cleve, 1881 (uncertain > unassessed )
Rhizosolenia sima Castracane, 1886 (uncertain > unassessed )
Rhizosolenia sima f. sima
Rhizosolenia simplex Karsten, 1905
Rhizosolenia styliformis T.Brightwell, 1858
Rhizosolenia tenuijuncta Manguin, 1960 (uncertain > unassessed )
Rhizosolenia truncata G.Karsten, 1905 (uncertain > unassessed )
Rhizosolenia tubiformis G.R.Hasle, 1975 (uncertain > unassessed )