Atagema intecta (E.F. Kelaart, 1858)
Artachaea intermedia N.B. Eales, 1938
Paradoris inversa J.A. Ortea, 1995
Halgerda iota N. Yonow, 1994
Halgerda johnsonorum C.H. Carlson & P.J. Hoff,2000
Geitodoris joubini (A.J.B.M. Vayssière,1919)
Tayuva ketosjuva Er. Marcus & Ev. Marcus,1970
Jorunna labialis (C.N.E. Eliot, 1908)
Montereina labifera (F.D. Abraham, 1877)
Thordisa ladislavii (H.F.A. von Ihering,1886)
Discodoris laminea (J.J. Risbec, 1928)
Montereina lancei (S.V. Millen& H.W. Bertsch, 2000)
Alloiodoris lanuginata (F.D. Abraham, 1877)
Gargamella lemchei (Ev. Marcus, 1976)
Montereina lentiginosa (S.V. Millen, 1982)
Tayuva lilacina (A.A. Gould, 1852)
Tayuva lilacina confusa (E. Ballesteros, E.M. Llera& J.A. Ortea, 1985)
Tayuva lilacina palma (J.K. Allan, 1933)
Montereina lippa (Á. Valdés, 2001)
Paradoris liturata (L.S.R. Bergh, 1905)
Paradoris lopezi A. Hermosillo & Á. Valdés,2004
Thorybopus lophatus P. Bouchet, 1977
Paradoris lora (Er. Marcus, 1965)
Jorunna luisae Ev. Marcus, 1976
Thordisa lurca (Er. Marcus & Ev. Marcus,1967)
Geitodoris lutea K. Baba, 1937
Taringa luteola (E.F. Kelaart, 1858)
Thordisa luteola G.L. Chan & T.M. Gosliner,2007
Rostanga lutescens (L.S.R. Bergh, 1905)
Platydoris macfarlandi G.D. Hanna, 1951
Halgerda maculata (C.N.E. Eliot, 1906)
Thordisa maculigera L.S.R. Bergh, 1877
Hoplodoris madibenthos Ortea, 2016
Jorunna maima (L.S.R. Bergh, 1878)
Halgerda malesso C.H. Carlson & P.J. Hoff,1993