• Acrosiphonia arcta (Dillwyn) Gain, 1912: coenocytic
• Acrosiphonia coalita (Ruprecht) Scagel, Garbary, Golden & M.W.Hawkes, 1986: coenocytic
• Acrosiphonia congregata (Agardh) Kjellman: coenocytic
• Acrosiphonia duriuscula (Ruprecht) Yendo, 1916: coenocytic
• Acrosiphonia effusa Kjellman, 1893: coenocytic
• Acrosiphonia flabelliformis Jónsson: coenocytic
• Acrosiphonia flaccida Kjellman: coenocytic
• Acrosiphonia flagellata Kjellman, 1893: coenocytic
• Acrosiphonia grandis Kjelmann, 1893: coenocytic
• Acrosiphonia hemisphaerica Kjellman, 1893: coenocytic
• Acrosiphonia heterocladia (Sakai) K.L.Vinogradova, 1979: coenocytic
• Acrosiphonia incurva Kjellman, 1893: coenocytic
• Acrosiphonia minima (Fosl.) Kjellman: coenocytic
• Acrosiphonia orientalis (J.Agardh) P.C.Silva, 1996: coenocytic
• Acrosiphonia penicilliformis (Foslie) Kjellman, 1893: coenocytic
• Acrosiphonia saxatilis (Ruprecht) K.L.Vinogradova, 1979: coenocytic
• Acrosiphonia setacea Kjellman: coenocytic
• Acrosiphonia sonderi (Kützing) Kornmann, 1962: coenocytic
• Acrosiphonia spinescens (Kützing) Kjellman, 1893: coenocytic
• Acrosiphonia stolonifera Kjellman, 1893: coenocytic
• Aegagropila brownii (Dillwyn) Kützing, 1854: coenocytic
• Aegagropila globulus K.Meier, 1927: coenocytic
• Aegagropila kannoi Tokida, 1954: coenocytic
• Aegagropila montagneana (Kützing) Kützing, 1854: coenocytic
• Aegagropilopsis clavuligera (Grunow) Boedeker, 2012: coenocytic
• Aegagropilopsis moravica (Dvořák) Z.-J.Zhao & G.-X.Liu, 2015: coenocytic
• Aegagropilopsis sterrocladia (Skuja) Boedeker, 2012: coenocytic
• Anadyomene cladophoroides (W.J.Gilbert) Guiry & A.R.Sherwood, 2023: coenocytic
• Anadyomene crispa Chevallier: coenocytic
• Anadyomene eseptata Gilbert, 1961: coenocytic
• Anadyomene gigantodictyon M.M.Littler & D.S.Littler, 2012: coenocytic
• Anadyomene howei D.S.Littler & Littler, 1991: coenocytic
• Anadyomene lacerata D.S.Littler & Littler, 1991: coenocytic
• Anadyomene leclancheri Decaisne, 1844: coenocytic
• Anadyomene lenormandii J.E.Gray: coenocytic
• Anadyomene linkiana D.S.Littler & M.M.Littler, 1991: coenocytic
• Anadyomene menziesii (J.E.Gray) J.Agardh, 1887: coenocytic
• Anadyomene muelleri Sonder: coenocytic
• Anadyomene pavonina (J.Agardh) Wille, 1910: coenocytic
• Anadyomene plicata C.Agardh, 1823: coenocytic
• Anadyomene reticulata Askenasy, 1888: coenocytic
• Anadyomene rhizoidifera A.B.Joly & Pereira, 1973: coenocytic
• Anadyomene saldanhae A.B.Joly & E.C.Oliveira, 1969: coenocytic
• Anadyomene stellata (Wulfen) C.Agardh, 1823: coenocytic
• Anadyomene wrightii Harvey ex J.E.Gray, 1866: coenocytic
• Apjohnia laetevirens Harvey, 1855: coenocytic
• Apjohnia scoparia (Kützing) Valet, 1997: coenocytic
• Arnoldiella chelonum (Collins) C.Boedeker, 2012: coenocytic
• Arnoldiella conchophila V.V.Miller, 1928: coenocytic
• Arnoldiella crassa (W.E.Hoffmann & J.E.Tilden) C.Boedeker, 2012: coenocytic
• Arnoldiella elbakyaniae Auricchio & C.K.Peres, 2019: coenocytic
• Arnoldiella emedii (C.K.Peres & C.C.Z. Branco) C.K.Peres & Auricchio, 2019: coenocytic
• Arnoldiella kosterae (C.Hoek) C.Boedeker, 2012: coenocytic
• Arnoldiella sinensis (N.L.Gardner) C.Boedeker, 2012: coenocytic
• Arnoldiella vivipara (Normandin & Taft) C.Boedeker, 2012: coenocytic
• Arnoldiella wuhanensis G.-X.Liu & Z.G.Hu, 2012: coenocytic
• Basicladia okamurae (S.Ueda) Garbary, 2010: coenocytic
• Basicladia ramulosa Ducker, 1958: coenocytic
• Blastophysa rhizopus Reinke, 1889: coenocytic
• Boergesenia forbesii (Harvey) Feldmann, 1938: coenocytic
• Boergesenia magna Kraft, 2007: coenocytic
• Boergesenia parvula D.L.Ballantine, H.Ohba & C.Lozada-Troche, 2011: coenocytic
• Boodlea coacta (Dickie) G.Murray & De Toni, 1889: coenocytic
• Boodlea composita (Harvey) F.Brand, 1904: coenocytic
• Boodlea montagnei (Harvey ex J.E.Gray) Egerod, 1952: coenocytic
• Boodlea struveoides M.Howe, 1918: coenocytic
• Boodlea vanbosseae Reinbold, 1905: coenocytic
• Brilliantia kiribatiensis Leliaert, E.Kelly & Jen.E.Smith, 2022: coenocytic
• Bryobesia johannae Weber Bosse, 1913: coenocytic
• Chaetocladiella litoralis (Skabichevskij) K.Meyer & Skabichevskij: coenocytic
• Chaetocladiella microscopica (K.I.Meyer) K.I.Meyer & Skabitschevsky, 1968: coenocytic
• Chaetomorpha adrianii Feldmann, 1936: coenocytic
• Chaetomorpha aerea (Dillwyn) Kützing, 1849: coenocytic
• Chaetomorpha akineta M.A.Sahito, Z.A.Nizamani & S.M.Leghari: coenocytic
• Chaetomorpha antennina (Bory) Kützing, 1847: coenocytic
• Chaetomorpha auricoma (Suhr) Blair, 1983: coenocytic
• Chaetomorpha baicalensis K.I.Meyer [C.I.Meyer], 1922: coenocytic
• Chaetomorpha bangioides E.Y.Dawson, 1950: coenocytic
• Chaetomorpha basiretrorsa Setchell, 1926: coenocytic
• Chaetomorpha billardieri Kützing, 1847: coenocytic
• Chaetomorpha brachygona Harvey, 1858: coenocytic
• Chaetomorpha breviarticulata Hauck, 1884: coenocytic
• Chaetomorpha californica Collins, 1900: coenocytic
• Chaetomorpha cannabina (Areschoug) Kjellman, 1889: coenocytic
• Chaetomorpha capillaris (Kützing) Børgesen, 1925: coenocytic
• Chaetomorpha cartilaginea M.Howe, 1914: coenocytic
• Chaetomorpha chapmanii Molinari & Guiry, 2021: coenocytic
• Chaetomorpha clavata Kützing, 1847: coenocytic
• Chaetomorpha coliformis (Montagne) Kützing, 1849: coenocytic
• Chaetomorpha crassa (C.Agardh) Kützing, 1845: coenocytic
• Chaetomorpha curta (Skab.) Skabitschevsky, 1970: coenocytic
• Chaetomorpha dalmatica (Kuutzing) Kützing, 1845: coenocytic
• Chaetomorpha dubyana Kützing, 1853: coenocytic
• Chaetomorpha elongata V.J.Chapman, 1956: coenocytic
• Chaetomorpha exigua Schiffner, 1931: coenocytic
• Chaetomorpha exilissima E.R.Parodi & E.J.Cáceres, 1996: coenocytic
• Chaetomorpha exposita (Børgesen) E.Y.Dawson, 1954: coenocytic
• Chaetomorpha firma Levring, 1941: coenocytic
• Chaetomorpha geniculata Montagne, 1856: coenocytic
• Chaetomorpha gracilis Kützing, 1845: coenocytic