• Acanthophora muscoides (Linnaeus) Bory de Saint-Vincent, 1828
• Acanthophora nayadiformis (Delile) Papenfuss, 1968
• Acrochaetium alariae (Jónsson) Bornet, 1904
• Acrochaetium asparagopsis (Chemin) Papenfuss, 1945 accepted as Colaconema asparagopsis Chemin, 1926
• Acrochaetium attenuatum (Rosenvinge) Hamel, 1927 accepted as Colaconema attenuatum (Rosenvinge) R.Nielsen, 1994 accepted as Acrochaetium densum (K.M.Drew) Papenfuss, 1945 accepted as Acrochaetium catenulatum M.Howe, 1914
• Acrochaetium balticum (Rosenvinge) Aleem & Schulz, 1952
• Acrochaetium barbadense (Vickers) Børgesen, 1915
• Acrochaetium barbadensis (Vickers) Borgesen, 1915
• Acrochaetium battersianum Hamel, 1927
• Acrochaetium boergesenii Schiffner, 1931
• Acrochaetium bonnemaisoniae (Batters) Feldmann & G.Feldmann, 1940 accepted as Colaconema bonnemaisoniae Batters, 1896
• Acrochaetium brebneri (Batters) Hamel, 1928
• Acrochaetium caespitosum (J.Agardh) Nägeli, 1862 accepted as Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton, 1991
• Acrochaetium canariense Børgesen, 1927
• Acrochaetium catenulatum M.Howe, 1914
• Acrochaetium cheminii Feldmann, 1954 (uncertain)
• Acrochaetium chylocladiae (Batters) Batters, 1902 accepted as Colaconema chylocladiae Batters, 1896
• Acrochaetium codicola Børgesen, 1927 accepted as Colaconema codicola (Børgesen) Stegenga, J.J.Bolton & R.J.Anderson, 1997
• Acrochaetium codicolum Børgesen, 1927 accepted as Acrochaetium codicola Børgesen, 1927 accepted as Colaconema codicola (Børgesen) Stegenga, J.J.Bolton & R.J.Anderson, 1997
• Acrochaetium codii Hamel, 1927 accepted as Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton, 1991
• Acrochaetium collopodum (Rosenvinge) Hamel, 1927
• Acrochaetium corymbiferum (Thuret) Batters, 1902 accepted as Colaconema corymbiferum (Thuret) Alongi, Cormaci & G.Furnari, 2017
• Acrochaetium crassipes (Børgesen) Børgesen, 1915
• Acrochaetium cymopoliae Børgesen, 1927
• Acrochaetium cytophagum (Rosenvinge) Hamel, 1927
• Acrochaetium daviesii (Dillwyn) Nägeli, 1862 accepted as Colaconema daviesii (Dillwyn) Stegenga, 1985
• Acrochaetium densum (K.M.Drew) Papenfuss, 1945 accepted as Acrochaetium catenulatum M.Howe, 1914
• Acrochaetium duboscqii Feldmann, 1935
• Acrochaetium dumontiae (Rosenvinge) Hamel, 1927
• Acrochaetium efflorescens (J.Agardh) Nägeli, 1861 accepted as Grania efflorescens (J.Agardh) Kylin, 1944
• Acrochaetium emergens (Rosenvinge) Weber Bosse, 1921 accepted as Colaconema emergens (Rosenvinge) R.Nielsen, 1994
• Acrochaetium endophyticum Batters, 1896 accepted as Kylinia endophytica (Batters) Athanasiadis, 1996
• Acrochaetium endozoicum (Darbishire) Batters, 1902
• Acrochaetium extensum Ercegovic, 1957
• Acrochaetium gracile Børgesen, 1915 accepted as Colaconema gracile (Børgesen) Ateweberhan & Prud'homme van Reine, 2005
• Acrochaetium gynandrum (Rosenvinge) Hamel, 1927 accepted as Colaconema gynandrum (Rosenvinge) R.Nielsen, 1994
• Acrochaetium hallandicum (Kylin) Hamel, 1927 accepted as Colaconema hallandicum (Kylin) Afonso-Carillo, Sanson, Sangil & Diaz-Villa, 2007
• Acrochaetium hauckii Schiffner, 1916
• Acrochaetium humile (Rosenvinge) Børgesen, 1915
• Acrochaetium immersum (Rosenvinge) Hamel, 1927
• Acrochaetium inclusum (Levring) Papenfuss, 1945
• Acrochaetium incrassatum Ercegovic, 1957
• Acrochaetium infestans M.Howe & Hoyt, 1916 accepted as Colaconema infestans (M.Howe & Hoyt) Woelkerling, 1973
• Acrochaetium irregulare (Reinsch)
• Acrochaetium kuckuckianum Hamel, 1927
• Acrochaetium kylinii Hamel, 1927
• Acrochaetium lanuginosum (Dillwyn) Nägeli, 1858 accepted as Colaconema daviesii (Dillwyn) Stegenga, 1985
• Acrochaetium lenormandii (Suhr ex Kützing) Nägeli, 1862 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Acrochaetium leptonema (Rosenvinge) Børgesen, 1915 accepted as Colaconema leptonema (Rosenvinge) Alongi, Cormaci & G.Furnari, 2017
• Acrochaetium liagorae Børgesen, 1915
• Acrochaetium lorrain-smithiae (Lyle) L.Newton, 1931
• Acrochaetium macula (Rosenvinge) Hamel, 1927
• Acrochaetium maluinum Hamel, 1927 (uncertain)
• Acrochaetium mediterraneum (Levring) Athanasiadis, 2003
• Acrochaetium microfilum C.-C.Jao, 1936
• Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli, 1858
• Acrochaetium minimum Collins, 1908 accepted as Colaconema minimum (Collins) Woelkerling, 1973
• Acrochaetium minutissimum (Shur) Nägeli, 1861 accepted as Acrochaetium minutissimum Nägeli, 1862 accepted as Acrochaetium minutum (Suhr) Hamel, 1927
• Acrochaetium minutissimum Nägeli, 1862 accepted as Acrochaetium minutum (Suhr) Hamel, 1927
• Acrochaetium minutum (Suhr) Hamel, 1927
• Acrochaetium mirabile (Suhr) Nägeli, 1862 accepted as Colaconema daviesii (Dillwyn) Stegenga, 1985
• Acrochaetium molinieri Coppejans & Boudouresque, 1976
• Acrochaetium moniliforme (Rosenvinge) Børgesen, 1915
• Acrochaetium naumannii (Askenasy) Askenasy accepted as Colaconema naumannii (Askenasy) Prud'homme van Reine, Haroun & Kostermans, 2019
• Acrochaetium nemalii (De Notaris ex Dufour) Børgesen, 1915 accepted as Colaconema nemalionis (De Notaris ex L.Dufour) Stegenga, 1985
• Acrochaetium nitophyllii (Levring) Papenfuss, 1945
• Acrochaetium occidentale Børgesen, 1915 accepted as Acrochaetium barbadense (Vickers) Børgesen, 1915
• Acrochaetium pallens (Zanardini) Nägeli, 1862
• Acrochaetium parvulum (Kylin) Hoyt, 1920
• Acrochaetium polyblastum (Rosenvinge) Børgesen, 1915 accepted as Colaconema hallandicum (Kylin) Afonso-Carillo, Sanson, Sangil & Diaz-Villa, 2007
• Acrochaetium pulchellum Børgesen, 1915
• Acrochaetium pulvereum Nägeli, 1862 (uncertain)
• Acrochaetium radiatum C.-C.Jao, 1936 accepted as Acrochaetium humile (Rosenvinge) Børgesen, 1915
• Acrochaetium reductum (Rosenvinge) Hamel, 1927
• Acrochaetium rhipidandrum (Rosenvinge) Hamel, 1927 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Acrochaetium robustum Børgesen, 1915 accepted as Colaconema robustum (Børgesen) Huisman & Woelkerling, 2018
• Acrochaetium rosulata (Rosenvinge) Papenfuss accepted as Acrochaetium rosulatum (Rosenvinge) Papenfuss, 1945 accepted as Kylinia rosulata Rosenvinge, 1909
• Acrochaetium rosulatum (Rosenvinge) Papenfuss, 1945 accepted as Kylinia rosulata Rosenvinge, 1909
• Acrochaetium sanctae-mariae (Darbishire) Hamel, 1927
• Acrochaetium savianum (Meneghini) Nägeli, 1862 accepted as Colaconema savianum (Meneghini) R.Nielsen, 1994
• Acrochaetium scapae (Lyle) Papenfuss, 1945
• Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Acrochaetium seiriolanum (Harvey-Gibson) Hamel, 1927
• Acrochaetium sparsum (Harvey) Nägeli, 1862
• Acrochaetium stilophorae (Levring) Kylin, 1944
• Acrochaetium subpinnatum Bornet ex Hamel, 1927
• Acrochaetium subseriatum Børgesen, 1932
• Acrochaetium subtilissimum (Kützing) Hamel, 1927 accepted as Colaconema subtilissimum (Kützing) Alongi, Cormaci & G.Furnari, 2017
• Acrochaetium thuretii (Bornet) Collins & Hervey, 1917 accepted as Grania efflorescens (J.Agardh) Kylin, 1944
• Acrochaetium trifilum (Buffham) Batters, 1902
• Acrochaetium unifilum C.-C.Jao, 1936
• Acrochaetium virgatulum (Harvey) Batters, 1902 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Acrodiscus vidovichii (Meneghini) Zanardini, 1868
• Acrosorium ciliolatum (Harvey) Kylin, 1924
• Acrosorium reptans (P.Crouan & H.Crouan) Kylin, 1924 accepted as Cryptopleura ramosa (Hudson) L.Newton, 1931
• Acrosorium venulosum (Zanardini) Kylin, 1924
• Acrosymphyton purpuriferum (J.Agardh) G.Sjöstedt, 1926
• Acrosymphyton taylorii I.A.Abbott, 1962
• Acrothamnion preissii (Sonder) E.M.Wollaston, 1968
• Aeodes marginata (Roussel) F.Schmitz, 1894 accepted as Felicinia marginata (Roussel) Manghisi, Le Gall, Ribera, Gargiulo & Morabito, 2014