Halgerda abyssicola S.J. Fahey & T.M. Gosliner,2000
Montereina achroma (Á. Valdés, 2001)
Thordisa aculeata J.A. Ortea & Á. Valdés,1995
Paradoris adamsae V. Padula & Á. Valdés,2012
Atagema africana A. Pruvot-Fol, 1953
Taringa aivica Er. Marcus & Ev. Marcus,1967
Atagema alba (O'Donoghue, 1927)
Diaulula alba (K. White, 1952)
Discodoris alba K.M. White, 1952
Trippa albata R.F. Burn, 1962
Halgerda albocristata T.M. Gosliner & S.J. Fahey,1998
Thordisa albomacula G.L. Chan & T.M. Gosliner,2007
Platydoris album Lin Guangyu & Tchang-Si,1965
Montereina aliciae B. Dayrat, 2010
Rostanga alisae A.V. Martynov, 2003
Jorunna alisonae Ev. Marcus, 1976
Rostanga aliusrubens W.B. Rudman & G.J. Avern,1989
Thordisa amakusana K. Baba, 1937
Discodoris amboynensis L.S.R. Bergh, 1890
Atagema anceps (L.S.R. Bergh, 1890)
Peltodoris angulata C.N.E. Eliot, 1903
Platydoris angustipes (O.A.L. Mörch, 1863)
Rostanga ankyra Á. Valdés, 2001
Paradoris annularis Ortea,Espinosa & Moro, 2017
Platydoris annulata K.M. Dorgan, Á. Valdés& T.M. Gosliner, 2002
Thordisa annulata C.N.E. Eliot, 1910
Rostanga anthelia A. Perrone, 1991
Sclerodoris apiculata (J. Alder & A. Hancock,1864)
Paradoris araneosa Á. Valdés, 2001
Rostanga arbutus (G.F. Angas, 1864)
Taringa arcaica L. Moro & J.A. Ortea,2015
Atagema areolata J. Alder & A. Hancock,1864
Platydoris argo (C. Linnaeus, 1767)
Hoplodoris armata (K. Baba, 1993)
Nophodoris armata Á. Valdés & T.M. Gosliner,2001