• Ammothea Lamarck, 1816 accepted as Lemnalia Gray, 1868
• Ammothea Leach, 1814
• Ammothea (Achelia) accepted as Achelia Hodge, 1864
• Ammothea (Achelia) armata Bouvier, 1916 accepted as Achelia armata Bouvier, 1916
• Ammothea (Ammothella) Verril, 1900 accepted as Ammothella Verrill, 1900
• Ammothea acheliata Child, 1998
• Ammothea achelioides Wilson, 1878 accepted as Achelia spinosa (Stimpson, 1853)
• Ammothea adunca Child, 1994
• Ammothea africana May, 1898 accepted as Lemnalia africana (May, 1898)
• Ammothea alaskensis Cole, 1904 accepted as Achelia alaskensis (Cole, 1904)
• Ammothea allopodes Fry & Hedgpeth, 1969
• Ammothea amicorum (Blainville) (uncertain)
• Ammothea antarctica Bouvier, 1905 accepted as Ammothea clausi Pfeffer, 1889
• Ammothea antipodensis Clark, 1972
• Ammothea arborea (Forskål, 1775) accepted as Litophyton arboreum Forskål, 1775
• Ammothea armentis Child, 1994
• Ammothea australiensis (Flynn, 1919)
• Ammothea australis (Hodgson, 1907) accepted as Ammothea clausi Pfeffer, 1889
• Ammothea bauiana May, 1898 (uncertain)
• Ammothea bentartica Munilla, 2001
• Ammothea bicorniculata Stiboy-Risch, 1992
• Ammothea bigibbosa Munilla & Ramos, 2005
• Ammothea borealis Schimkewitsch, 1895 accepted as Achelia borealis (Schimkewitsch, 1895)
• Ammothea borealis japonica Losina-Losinsky, 1933 accepted as Achelia borealis japonica (Losina-Losinsky, 1933)
• Ammothea brassica May, 1898 accepted as Lithophytum brassicum (May, 1898) accepted as Lemnalia brassica (May, 1899)
• Ammothea brevicauda Loman, 1904 accepted as Achelia brevicauda (Loman, 1904)
• Ammothea brevipes Hodge, 1864 accepted as Achelia echinata Hodge, 1864
• Ammothea calmani Gordon, 1932
• Ammothea carnosa Kükenthal, 1895 accepted as Lithophytum carnosum (Kükenthal, 1895) accepted as Litophyton carnosum (Kükenthal, 1895) accepted as Lemnalia carnosa (Kükenthal, 1895)
• Ammothea carolinensis Leach, 1814
• Ammothea cervicornis May, 1898 accepted as Lemnalia cervicornis (May, 1898)
• Ammothea charcoti (Bouvier, 1905) accepted as Ammothea carolinensis Leach, 1814
• Ammothea chelata Hilton, 1939 accepted as Achelia chelata (Hilton, 1939)
• Ammothea childi Cano & López-González, 2013
• Ammothea clausi Pfeffer, 1889
• Ammothea cooki Child, 1987 sensu Munilla & Soler Membrives, 2008 accepted as Ascorhynchus cooki Child, 1987
• Ammothea curculio Bouvier, 1906 accepted as Ammothea carolinensis Leach, 1814
• Ammothea cuspidata Hodgson, 1910 (uncertain > nomen dubium)
• Ammothea depolaris Stock, 1966
• Ammothea digitata May, 1898 accepted as Lemnalia digitata (May, 1898)
• Ammothea digitata var. philippinensis May, 1899 accepted as Lemnalia philippinensis (May, 1899)
• Ammothea dorsiplicata (Hilton, 1943)
• Ammothea dubia (Hedgpeth, 1950) accepted as Boehmia dubia Hedgpeth, 1950
• Ammothea echinata Hodge, 1864 accepted as Achelia echinata Hodge, 1864
• Ammothea echinata Losina-Losinsky, 1933 accepted as Achelia echinata Hodge, 1864
• Ammothea echinata orientalis Losina-Losinsky, 1933 accepted as Achelia echinata orientalis (Losina-Losinsky, 1933) accepted as Achelia japonica Ortmann, 1890
• Ammothea elegans May, 1898 accepted as Lithophytum elegans (May, 1898) accepted as Lemnalia elegans (May, 1898)
• Ammothea elongata Hilton, 1942 accepted as Achelia borealis (Schimkewitsch, 1895)
• Ammothea euchelata Hedgpeth, 1940 accepted as Achelia chelata (Hilton, 1939)
• Ammothea flava May, 1898 accepted as Lemnalia flava (May, 1898)
• Ammothea flynni (Marcus, 1940) accepted as Ammothea magniceps Thompson, 1884
• Ammothea gibbosa (Möbius, 1902) accepted as Ammothea carolinensis Leach, 1814
• Ammothea gibbosa Bouvier, 1913 accepted as Ammothea carolinensis Leach, 1814
• Ammothea gigantea Gordon, 1932
• Ammothea glacialis (Hodgson, 1907)
• Ammothea gordonae Child, 1994
• Ammothea gracilipes Bouvier, 1911 accepted as Ammothea minor (Hodgson, 1907)
• Ammothea gracilipes borealis Losina-Losinsky, 1933
• Ammothea graeffei Kükenthal, 1896 accepted as Lithophytum graeffei (Kükenthal, 1896) accepted as Umbellulifera graeffei (Kükenthal, 1896)
• Ammothea grande (Bouvier, 1906) accepted as Ammothea carolinensis Leach, 1814
• Ammothea grandis Pfeffer, 1889 accepted as Ammothea carolinensis Leach, 1814
• Ammothea grossifemora Hilton, 1942 accepted as Tanystylum grossifemorum (Hilton, 1942)
• Ammothea hedgpethi (Utinomi, 1959)
• Ammothea hesperidensis Munilla, 2000
• Ammothea hilgendorfi (Böhm, 1879)
• Ammothea imbricata (Quoy & Gaimard, 1833) accepted as Capnella imbricata (Quoy & Gaimard, 1833)
• Ammothea insularis Child, 1992
• Ammothea latifrons Cole, 1904 accepted as Achelia latifrons (Cole, 1904)
• Ammothea lavrentii Losina-Losinsky, 1933 accepted as Achelia lavrentii (Losina-Losinsky, L.K., 1933) accepted as Achelia spinosa (Stimpson, 1853)
• Ammothea litke Losina-Losinsky, 1933 accepted as Achelia litke (Losina-Losinsky, L.K., 1933) accepted as Achelia spinosa (Stimpson, 1853)
• Ammothea litke intermedia Losina-Losinsky, 1933 accepted as Achelia litke (Losina-Losinsky, L.K., 1933) accepted as Achelia spinosa (Stimpson, 1853)
• Ammothea longipes Hodge, 1864 accepted as Ammothella longipes (Hodge, 1864)
• Ammothea longispina Gordon, 1932
• Ammothea luetkeni von Marenzeller, 1878 accepted as Drifa glomerata (Verrill, 1869)
• Ammothea magniceps Thompson, 1884
• Ammothea magnirostris Dohrn, 1881 accepted as Ammothella magnirostris (Dohrn, 1881) accepted as Ammothella longipes (Hodge, 1864)
• Ammothea makara Clark, 1977
• Ammothea marginatum (Cole, 1904) accepted as Ammothea hilgendorfi (Böhm, 1879)
• Ammothea megova Hilton, 1943 accepted as Achelia megova (Hilton, 1943)
• Ammothea meridionalis Hodgson, 1914
• Ammothea minor (Hodgson, 1907)
• Ammothea nana Loman, 1908 accepted as Achelia nana (Loman, 1908)
• Ammothea nidiuscula Hall, 1913 accepted as Achelia alaskensis (Cole, 1904)
• Ammothea nitida Verrill, 1864 accepted as Lemnalia nitida (Verrill, 1864)
• Ammothea nitida Verrill, 1869 accepted as Lemnalia nitida (Verrill, 1864)
• Ammothea ovatoides Stock, 1973
• Ammothea ovatus (Hilton, 1942) accepted as Ammothea hilgendorfi (Böhm, 1879)
• Ammothea ovatus Hilton, 1942 accepted as Ammothea hilgendorfi (Böhm, 1879)
• Ammothea ovosetosa Hilton, 1942 accepted as Achelia ovosetosa (Hilton, 1942)
• Ammothea parasitica Duchassaing & Michelotti, 1860 accepted as Nephthya parasitica (Duchassaing & Michelotti, 1860)
• Ammothea phalloides Lamarck, 1816 (uncertain)
• Ammothea polyanthes Duchassaing & Michelotti, 1860 accepted as Briareum asbestinum (Pallas, 1766)
• Ammothea profunda Losina-Losinsky, 1961
• Ammothea pseudospinosa Cano & López-González, 2013
• Ammothea quadridentata Hodgson, 1910 accepted as Achelia quadridentata (Hodgson, 1910)
• Ammothea ramosa (Quoy & Gaimard, 1833) accepted as Lithophytum ramosum (Quoy & Gaimard, 1833) accepted as Litophyton ramosum (Quoy & Gaimard, 1833)
• Ammothea rubriflora Pütter, 1900 (uncertain)
• Ammothea sanderi May, 1899 accepted as Litophyton viridis (May, 1898)
• Ammothea sexarticulata Munilla, 1990 accepted as Ammothea sextarticulata Munilla, 1991
• Ammothea sextarticulata Munilla, 1991