• Lomentaria Lyngbye, 1819
• Lomentaria acicularis (J.Agardh) Falkenberg, 1879 accepted as Lomentaria articulata (Hudson) Lyngbye, 1819
• Lomentaria affinis (Hooker & Harvey) Kützing, 1849 accepted as Champia affinis (J.D.Hooker & Harvey) Harvey, 1853
• Lomentaria ambigua Kützing, 1865 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria amplexans R.E.Norris, 1987
• Lomentaria articulata (Hudson) Lyngbye, 1819
• Lomentaria articulata var. linearis Zanardini, 1841
• Lomentaria australis (Kützing) Levring, 1946
• Lomentaria baileyana (Harvey) Farlow, 1876 accepted as Hooperia divaricata (Durant) M.J.Wynne, C.W.Schneider & G.W.Saunders, 2019
• Lomentaria benahoarensis Afonso-Carrillo, Sangil & Sansón, 2009
• Lomentaria brachyarkeana Zanardini, 1854 (uncertain)
• Lomentaria caespitosa (Harvey) V.J.Chapman & Dromgoole, 1970
• Lomentaria caseae E.Y.Dawson, 1946
• Lomentaria catenata Harvey, 1857 accepted as Fushitsunagia catenata (Harvey) Filloramo & G.W.Saunders, 2016
• Lomentaria chylocladiella Funk, 1955
• Lomentaria clavata (Roth) J.Agardh, 1852 accepted as Gastroclonium clavatum (Roth) Ardissone, 1883
• Lomentaria clavata f. nana Schiffner, 1933 accepted as Gastroclonium clavatum (Roth) Ardissone, 1883
• Lomentaria clavellosa (Lightfoot ex Turner) Gaillon, 1828
• Lomentaria clavellosa f. reducta Ercegovic, 1956
• Lomentaria clavellosa f. urvillei (J.V.Lamouroux) E.Taskin, 2014 (uncertain)
• Lomentaria clavellosa var. conferta (De Notaris ex Kützing) Feldmann, 1941
• Lomentaria clavellosa var. sedifolia Harvey accepted as Lomentaria clavellosa (Lightfoot ex Turner) Gaillon, 1828
• Lomentaria claviformis Ercegovic, 1956
• Lomentaria compressa (Kützing) Kylin, 1931
• Lomentaria corallicola Børgesen, 1939
• Lomentaria corallina (Suhr) Kützing, 1865 accepted as Erythroclonium corallinum (Suhr) Holmes, 1896
• Lomentaria corymbosa Zanardini, 1888 (uncertain)
• Lomentaria corynephora (J.Agardh) Kylin, 1931 accepted as Semnocarpa corynephora (J.Agardh) Huisman, Foard & Kraft, 1993
• Lomentaria dasyclada Kützing, 1865 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria diffusa Stegenga, Bolton & R.J.Anderson, 1997
• Lomentaria divaricata (Durant) M.J.Wynne, 2013 accepted as Hooperia divaricata (Durant) M.J.Wynne, C.W.Schneider & G.W.Saunders, 2019
• Lomentaria drouetii E.Y.Dawson, 1944
• Lomentaria ercegovicii Verlaque, Boudouresque, Meinesz, Giraud & Marcot Coqueugniot, 1977
• Lomentaria exigua De Notaris, 1841 (uncertain)
• Lomentaria fasciata (Meneghini) Kützing, 1849 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria filiformis Kützing, 1865 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria firma (J.Agardh) Falkenberg, 1879
• Lomentaria firma f. compressa Ercegovic, 1956
• Lomentaria flaccida Tak.Tanaka, 1944
• Lomentaria fruticulosa Reinbold, 1899 accepted as Lomentaria australis (Kützing) Levring, 1946
• Lomentaria furcata (C.Agardh) Zanardini, 1840 accepted as Gloiocladia furcata (C.Agardh) J.Agardh, 1842
• Lomentaria gracilis Audouin, 1826 accepted as Jania virgata (Zanardini) Montagne, 1846
• Lomentaria gracillima Masuda & Kogame, 2002
• Lomentaria hakodatensis Yendo, 1920
• Lomentaria implexa De Toni & Levi, 1888 (uncertain)
• Lomentaria impudica Montagne, 1840 accepted as Catenella impudica (Montagne) J.Agardh, 1852
• Lomentaria indica Weber-van Bosse, 1928
• Lomentaria intertexta Chauvin ex Duby, 1830 accepted as Champia parvula (C.Agardh) Harvey, 1853
• Lomentaria intricata De Toni & Levi, 1888 (uncertain)
• Lomentaria irregularis Zanardini, 1851 accepted as Champia irregularis (Zanardini) Piccone, 1884
• Lomentaria jabukae Ercegovic, 1956
• Lomentaria kaliformis (Goodenough & Woodward) Areschoug, 1847 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria kaliformis f. nana Schiffner, 1933 (uncertain)
• Lomentaria kaliformis var. patens (Kützing) J.Agardh accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria kaliformis var. phalligera (J.Agardh) Schiffner, 1933 accepted as Lomentaria articulata var. linearis Zanardini, 1841
• Lomentaria kotschyana (Endlicher & Diesing) J.Agardh, 1852 accepted as Champia kotschyana Endlicher & Diesing, 1854
• Lomentaria liguistica Ardissone, 1875 (uncertain)
• Lomentaria linearis (Zanardini) Zanardini, 1849 accepted as Lomentaria articulata var. linearis Zanardini, 1841
• Lomentaria lubrica (Yendo) Yamada, 1932
• Lomentaria mauritiana Børgesen, 1944
• Lomentaria mediterranea Endlicher accepted as Gastroclonium clavatum (Roth) Ardissone, 1883
• Lomentaria monochlamydea (J.Agardh) Kylin, 1931
• Lomentaria muelleri Sonder, 1853 accepted as Coelarthrum opuntia (Endlicher) Børgesen, 1937
• Lomentaria okamurae Segawa, 1948
• Lomentaria opuntia (Endlicher) J.Agardh, 1852 accepted as Coelarthrum opuntia (Endlicher) Børgesen, 1937
• Lomentaria opuntia (Goodenough & Woodward) Gaillon, 1828 accepted as Catenella caespitosa (Withering) L.M.Irvine, 1976
• Lomentaria orcadensis (Harvey) Collins, 1937
• Lomentaria ovalis
• Lomentaria ovalis var. coulteri Harvey, 1853 accepted as Neogastroclonium subarticulatum (Turner) L.Le Gall, Dalen & G.W.Saunders, 2008
• Lomentaria ovalis var. subarticulata (Turner) Harvey, 1853 accepted as Neogastroclonium subarticulatum (Turner) L.Le Gall, Dalen & G.W.Saunders, 2008
• Lomentaria ovata (J.V.Lamouroux) Gaillon, 1828 accepted as Claviclonium ovatum (J.V.Lamouroux) Kraft & Min-Thein, 1983
• Lomentaria parvula (C.Agardh) Zanardini, 1841 accepted as Champia parvula (C.Agardh) Harvey, 1853
• Lomentaria parvula var. vaga Kützing, 1865 accepted as Champia parvula (C.Agardh) Harvey, 1853
• Lomentaria patens Kützing, 1843 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria pertusa Schousboe (uncertain)
• Lomentaria phalligera (J.Agardh) Endlicher, 1843 accepted as Lomentaria articulata var. linearis Zanardini, 1841
• Lomentaria pinnata Segawa, 1938
• Lomentaria prasina De Noraris, 1888 (uncertain)
• Lomentaria pusilla De Notaris ex Kützing, 1849 accepted as Laurencia nana (C.Agardh) Greville, 1830
• Lomentaria pygmaea (J.V.Lamouroux) Gaillon, 1828 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria pygmaea Duby, 1830 accepted as Gastroclonium reflexum (Chauvin) Kützing, 1849
• Lomentaria pyramidalis Kraft & Womersley, 1996
• Lomentaria ramsayana (J.Agardh) Kylin, 1931 accepted as Lomentaria catenata Harvey, 1857 accepted as Fushitsunagia catenata (Harvey) Filloramo & G.W.Saunders, 2016
• Lomentaria rawitscheri A.B.Joly, 1957
• Lomentaria reflexa Chauvin, 1831 accepted as Gastroclonium reflexum (Chauvin) Kützing, 1849
• Lomentaria rosea (Harvey) Thuret, 1863 accepted as Lomentaria orcadensis (Harvey) Collins, 1937
• Lomentaria rosea var. orcadensis (Harvey) Harvey, 1850 accepted as Lomentaria orcadensis (Harvey) Collins, 1937
• Lomentaria saxigena V.J.Chapman & Dromgoole, 1970
• Lomentaria secunda (J.D.Hooker & Harvey) V.J.Chapman & Domgoole, 1970
• Lomentaria sedifolia (Turner) Strömfelt ex Foslie, 1894 accepted as Lomentaria clavellosa (Lightfoot ex Turner) Gaillon, 1828
• Lomentaria sinensis M.Howe, 1924 accepted as Lomentaria hakodatensis Yendo, 1920
• Lomentaria squarrosa Kützing, 1843 accepted as Chylocladia verticillata (Lightfoot) Bliding, 1928
• Lomentaria strumosa M.J.Wynne, 1998
• Lomentaria subdichotoma Ercegovic, 1956
• Lomentaria tenera Ercegovic, 1956 accepted as Lomentaria ercegovicii Verlaque, Boudouresque, Meinesz, Giraud & Marcot Coqueugniot, 1977
• Lomentaria tenera Kützing, 1849
• Lomentaria tenerrima (Esper) P.C.Silva, 1996 (uncertain)
• Lomentaria torulosa Kützing, 1843 accepted as Chylocladia torulosa (Kützing) Dizerbo, 2007
• Lomentaria umbellata (J.D.Hooker & Harvey) Yendo, 1916
• Lomentaria uncinata Martens ex Kützing, 1849 (uncertain)