• Erythrotrichia Areschoug, 1850
• Erythrotrichia ascendens E.Y.Dawson, 1953
• Erythrotrichia australis Levring, 1953 accepted as Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia bangioides Levring, 1955
• Erythrotrichia bertholdii Batters, 1900
• Erythrotrichia biseriata Tanaka, 1944
• Erythrotrichia boryana (Montagne) Berthold, 1882 accepted as Porphyrostromium boryanum (Montagne) P.C.Silva, 1996
• Erythrotrichia boryana var. crispa Batters, 1900 accepted as Porphyrostromium boryanum (Montagne) P.C.Silva, 1996
• Erythrotrichia californica Kylin, 1941 accepted as Erythrotrichia tetraseriata N.L.Gardner, 1927
• Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia carnea f. investiens Batters, 1892 accepted as Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia carnea f. irregularis B.F.Zheng & J.Li
• Erythrotrichia carnea f. tenuis Tanaka, 1952
• Erythrotrichia carnea subsp. carnea
• Erythrotrichia ceramicola (Lyngbye) Areschoug, 1850 accepted as Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia ciliaris (Carmichael) Thuret, 1863 accepted as Porphyrostromium ciliare (Carmichael) M.J.Wynne, 1986
• Erythrotrichia discigera Berthold, 1882 accepted as Erythropeltis discigera (Berthold) F.Schmitz, 1896
• Erythrotrichia elongata Lami, 1938
• Erythrotrichia filibasalis Noda, 1987 accepted as Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia foliiformis G.R.South & N.M.Adams, 1976
• Erythrotrichia harveyi (Areschoug) Papenfuss, 1940
• Erythrotrichia hunterae N.L.Gardner, 1936
• Erythrotrichia incrassata T.Tanaka, 1944
• Erythrotrichia investiens (Zanardini) Bornet, 1892
• Erythrotrichia japonica Tokida, 1938 accepted as Porphyrostromium japonicum (Tokida) Kikuchi, 2011
• Erythrotrichia johnawestia X.Wen, G.C.Zuccarello & G.-H.Kim, 2023
• Erythrotrichia kylinii N.L.Gardner, 1927
• Erythrotrichia ligulata Womersley, 1994 accepted as Porphyrostromium ligulatum (Womersley) J.A.West & Zuccarello, 2011
• Erythrotrichia longistipitata J.A.West, Loiseaux-de Goër & Zuccarello, 2012
• Erythrotrichia minuta B.F.Zheng & J.Li
• Erythrotrichia nigrescens P.J.L.Dangeard, 1969 accepted as Porphyrostromium obscurum (Berthold) Kornmann, 1987 accepted as Porphyrostromium ciliare (Carmichael) M.J.Wynne, 1986
• Erythrotrichia obscura Berthold, 1882 accepted as Porphyrostromium ciliare (Carmichael) M.J.Wynne, 1986
• Erythrotrichia parietalis T.Tanaka, 1952
• Erythrotrichia parietalis var. majuscula T.Tanaka & Pham-Hoàng Hô, 1962
• Erythrotrichia parksii N.L.Gardner, 1927
• Erythrotrichia parksii var. minor N.L.Gardner, 1927
• Erythrotrichia platyphylla Stegenga, Engledow, Bolton & Anderson, 2001
• Erythrotrichia polymorpha M.Howe, 1914
• Erythrotrichia porphyroides N.L.Gardner, 1927
• Erythrotrichia propagulosa B.F.Zheng & J.Li
• Erythrotrichia pseudopulvinata P.J.L.Dangeard, 1968 accepted as Porphyrostromium ciliare (Carmichael) M.J.Wynne, 1986
• Erythrotrichia pulvinata N.L.Gardner, 1927 accepted as Porphyrostromium pulvinatum (N.L.Gardner) J.A.West & Zuccarello, 2011
• Erythrotrichia pulvinata Noda & Honda, 1970 accepted as Erythrotrichia filibasalis Noda, 1987 accepted as Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Erythrotrichia ramulosa B.F.Zheng & J.Li
• Erythrotrichia reflexa (P.L.Crouan & H.M.Crouan) Thuret ex De Toni, 1897
• Erythrotrichia regularis Noda, 1971
• Erythrotrichia rhizoidea Cleland, 1917
• Erythrotrichia rosea P.J.L.Dangeard, 1968 (uncertain)
• Erythrotrichia sargassicola Noda, 1970
• Erythrotrichia scalaris P.J.L.Dangeard, 1968
• Erythrotrichia simplex B.F.Zheng & J.Li
• Erythrotrichia simplex P.J.L.Dangeard, 1968 (uncertain > unassessed)
• Erythrotrichia tetraseriata N.L.Gardner, 1927
• Erythrotrichia tristanensis Baardseth, 1941 accepted as Porphyrostromium boryanum (Montagne) P.C.Silva, 1996
• Erythrotrichia vexillaris (Montagne) G.Hamel, 1929
• Erythrotrichia welwitschii (Ruprecht) Batters, 1902
• Erythrotrichiaceae G.M. Smith, 1933