• Acetabularia acetabulum (Linnaeus) P.C. Silva, 1952: vegetative fragmentation
• Acetabularia caliculus J.V.Lamouroux, 1824: vegetative fragmentation
• Acetabularia chiavonica Squinabol, 1902 †: vegetative fragmentation
• Acetabularia crenulata J.V. Lamouroux, 1816: vegetative fragmentation
• Acetabularia crenulata J.V.Lamouroux, 1816: vegetative fragmentation
• Acetabularia dentata Solms-Laubach, 1895: vegetative fragmentation
• Acetabularia dentata Solms-Laubach, 1895: vegetative fragmentation
• Acetabularia farlowii Solms-Laubach, 1895: vegetative fragmentation
• Acetabularia farlowii Solms-Laubach, 1895: vegetative fragmentation
• Acetabularia haemmerlingii H.G.Schweiger & Berger, 1975: vegetative fragmentation
• Acetabularia jalakanyakae Sani, Madhu, R.K.Kohli, K.Gupta & Bast, 2021: vegetative fragmentation
• Acetabularia kilneri J.Agardh, 1887: vegetative fragmentation
• Acetabularia major G.Martens, 1866: vegetative fragmentation
• Acetabularia moldavica Barattolo, Ionesi & Ţibuleac, 2019 †: vegetative fragmentation
• Acetabularia peniculus (R.Brown ex Turner) Solms-Laubach, 1895: vegetative fragmentation
• Acetabularia ryukyuensis Okamura & Yamada, 1932: vegetative fragmentation
• Acetabularia schenckii K. Möbius, 1889: vegetative fragmentation
• Acetabularia schenckii Möbius, 1889: vegetative fragmentation
• Aegagropila brownii (Dillwyn) Kützing, 1854: thallus fragmentation and drift
• Aegagropila globulus K.Meier, 1927: thallus fragmentation and drift
• Aegagropila kannoi Tokida, 1954: thallus fragmentation and drift
• Aegagropila montagneana (Kützing) Kützing, 1854: thallus fragmentation and drift
• Aglaothamnion bipinnatum (P.Crouan & H.Crouan) Feldmann & G.Feldmann, 1948: thallus fragmentation and drift
• Aglaothamnion boergesenii (Aponte & D.L.Ballantine) L'Hardy-Halos & Rueness, 1997: thallus fragmentation and drift
• Aglaothamnion callophyllidicola (Yamada) Boo, I.K.Lee, Rueness & Yoshida, 1991: thallus fragmentation and drift
• Aglaothamnion caudatum (J.Agardh) Feldmann-Mazoyer, 1941: thallus fragmentation and drift
• Aglaothamnion chadefaudii L'Hardy-Halos, 1984: thallus fragmentation and drift
• Aglaothamnion chejuense G.H.Kim & I.K.Lee: thallus fragmentation and drift
• Aglaothamnion circinnatum (Womersley) Cormaci, G. Furnari & Alongi, 2023: thallus fragmentation and drift
• Aglaothamnion collinsii Aponte, D.L.Ballantine & J.N.Norris, 1997: thallus fragmentation and drift
• Aglaothamnion confertum (Womersley) Cormaci, G. Furnari & Alongi, 2023: thallus fragmentation and drift
• Aglaothamnion cordatum (Børgesen) Feldmann-Mazoyer, 1941: thallus fragmentation and drift
• Aglaothamnion decompositum (J.Agardh) Halos: thallus fragmentation and drift
• Aglaothamnion diaphanum L'Hardy-Halos & Maggs, 1991: thallus fragmentation and drift
• Aglaothamnion endostolon Huisman, 2018: thallus fragmentation and drift
• Aglaothamnion endovagum (Setchell & N.L.Gardner) I.A.Abbott, 1972: thallus fragmentation and drift
• Aglaothamnion fasciculatum (Harvey) Maggs & L'Hardy-Halos, 1993: thallus fragmentation and drift
• Aglaothamnion feldmanniae Halos, 1965: thallus fragmentation and drift
• Aglaothamnion felipponei (Howe) Aponte, Ballantine & J.N.Norris, 1994: thallus fragmentation and drift
• Aglaothamnion flexibile N.E.Aponte & D.L.Ballantine, 1995: thallus fragmentation and drift
• Aglaothamnion gaillonii (P.L.Crouan & H.M.Crouan) Halos, 1965: thallus fragmentation and drift
• Aglaothamnion halliae (Collins) Aponte, D.L.Ballantine & J.N.Norris, 1997: thallus fragmentation and drift
• Aglaothamnion herveyi (M.Howe) N.E.Aponte, D.L.Ballantine & J.N.Norris, 1994: thallus fragmentation and drift
• Aglaothamnion monopodon Børgesen, 1945: thallus fragmentation and drift
• Aglaothamnion obstipum Cowling, Kraft & J.A.West, 1998: thallus fragmentation and drift
• Aglaothamnion okiense Kajimura, 1994: thallus fragmentation and drift
• Aglaothamnion oosumiense Itono, 1971: thallus fragmentation and drift
• Aglaothamnion priceanum Maggs, Guiry & Rueness, 1991: thallus fragmentation and drift
• Aglaothamnion propebyssoides (Womersley) Cormaci, G. Furnari & Alongi, 2023: thallus fragmentation and drift
• Aglaothamnion pseudobyssoides (P.Crouan & H.Crouan) Halos, 1965: thallus fragmentation and drift
• Aglaothamnion rabenhorstii (Kützing) L'Hardy-Halos: thallus fragmentation and drift
• Aglaothamnion sarcodiae Børgesen, 1952: thallus fragmentation and drift
• Aglaothamnion scopulorum (C.Agardh) Feldmann-Mazoyer, 1941: thallus fragmentation and drift
• Aglaothamnion shepherdii (Womersley) Cormaci, G. Furnari & Alongi, 2023: thallus fragmentation and drift
• Aglaothamnion tenuissimum (Bonnemaison) Feldmann-Mazoyer, 1941: thallus fragmentation and drift
• Aglaothamnion tripinnatum (C.Agardh) Feldmann-Mazoyer, 1941: thallus fragmentation and drift
• Aglaothamnion uruguayense (W.R.Taylor) N.E.Aponte, D.L.Ballantine & J.N.Norris, 1994: thallus fragmentation and drift
• Aglaothamnion violaceum (Harvey) Cormaci, G.Furnari & Alongi, 2023: thallus fragmentation and drift
• Chaetomorpha adrianii Feldmann, 1936: vegetative fragmentation
• Chaetomorpha aerea (Dillwyn) Kützing, 1849: thallus fragmentation and drift
• Chaetomorpha akineta M.A.Sahito, Z.A.Nizamani & S.M.Leghari: vegetative fragmentation
• Chaetomorpha antennina (Bory) Kützing, 1847: vegetative fragmentation
• Chaetomorpha auricoma (Suhr) Blair, 1983: vegetative fragmentation
• Chaetomorpha baicalensis K.I.Meyer [C.I.Meyer], 1922: vegetative fragmentation
• Chaetomorpha bangioides E.Y.Dawson, 1950: vegetative fragmentation
• Chaetomorpha basiretrorsa Setchell, 1926: vegetative fragmentation
• Chaetomorpha billardieri Kützing, 1847: vegetative fragmentation
• Chaetomorpha brachygona Harvey, 1858: vegetative fragmentation
• Chaetomorpha breviarticulata Hauck, 1884: vegetative fragmentation
• Chaetomorpha californica Collins, 1900: vegetative fragmentation
• Chaetomorpha cannabina (Areschoug) Kjellman, 1889: vegetative fragmentation
• Chaetomorpha capillaris (Kützing) Børgesen, 1925: vegetative fragmentation
• Chaetomorpha cartilaginea M.Howe, 1914: vegetative fragmentation
• Chaetomorpha chapmanii Molinari & Guiry, 2021: vegetative fragmentation
• Chaetomorpha clavata Kützing, 1847: vegetative fragmentation
• Chaetomorpha coliformis (Montagne) Kützing, 1849: vegetative fragmentation
• Chaetomorpha crassa (C.Agardh) Kützing, 1845: vegetative fragmentation
• Chaetomorpha curta (Skab.) Skabitschevsky, 1970: vegetative fragmentation
• Chaetomorpha dalmatica (Kuutzing) Kützing, 1845: vegetative fragmentation
• Chaetomorpha dubyana Kützing, 1853: vegetative fragmentation
• Chaetomorpha elongata V.J.Chapman, 1956: vegetative fragmentation
• Chaetomorpha exigua Schiffner, 1931: vegetative fragmentation
• Chaetomorpha exilissima E.R.Parodi & E.J.Cáceres, 1996: vegetative fragmentation
• Chaetomorpha exposita (Børgesen) E.Y.Dawson, 1954: vegetative fragmentation
• Chaetomorpha firma Levring, 1941: vegetative fragmentation
• Chaetomorpha geniculata Montagne, 1856: vegetative fragmentation
• Chaetomorpha gracilis Kützing, 1845: vegetative fragmentation
• Chaetomorpha henningsii P.G.Richter, 1893: vegetative fragmentation
• Chaetomorpha herbipolensis Lagerheim, 1887: vegetative fragmentation
• Chaetomorpha implicata Kützing, 1847: vegetative fragmentation
• Chaetomorpha indica (Kützing) Kützing, 1849: vegetative fragmentation
• Chaetomorpha inflata Kützing, 1849: vegetative fragmentation
• Chaetomorpha intestinalis Kützing, 1849: vegetative fragmentation
• Chaetomorpha irregularis (Zaneveld) M.Cormaci, G.Furnari & G.Alongi, 2014: vegetative fragmentation
• Chaetomorpha javanica Kützing, 1847: vegetative fragmentation
• Chaetomorpha kellersii M.A.Howe, 1932: vegetative fragmentation
• Chaetomorpha kerguelensis Levring, 1944: vegetative fragmentation
• Chaetomorpha liaodongensis L.Luan & R.Ding, 2013: vegetative fragmentation
• Chaetomorpha ligustica (Kützing) Kützing, 1849: vegetative fragmentation
• Chaetomorpha linoides Kützing, 1847: vegetative fragmentation