Acanthodoris is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Acanthodorididae.
The genus is believed to have originated in the Atlantic Ocean in the Cretaceous period and spread to the Pacific Ocean.
The relationships of Acanthodoris to the other genera in the superfamily Onchidoridoidea were evaluated by molecular phylogeny in 2015. and in 2024.
Species Species within this genus include: Acanthodoris armata O'Donoghue, 1927 (taxon inquirendum) Acanthodoris atrogriseata O'Donoghue, 1927 Acanthodoris brunnea MacFarland, 1905 Acanthodoris caerulescens Bergh, 1880 (taxon inquirendum) Acanthodoris falklandica Eliot, 1907 Acanthodoris globosa Abraham, 1877 Acanthodoris hudsoni MacFarland, 1905 Acanthodoris lutea MacFarland, 1925 Acanthodoris metulifera Bergh, 1905 Acanthodoris mollicella Abraham, 1877 Acanthodoris nanaimoensis O'Donoghue, 1921 Acanthodoris nanega Burn, 1969 Acanthodoris pilosa (Abildgaard in Müller, 1789) - type species Acanthodoris pina Ev. Marcus & Er. Marcus, 1967 Acanthodoris planca Fahey & Valdés, 2005 Acanthodoris rhodoceras Cockerell in Cockerell & Eliot, 1905 Acanthodoris vatheleti Rochebrune & Mabille, 1891 (nomen dubium)
Species brought into synonymy Acanthodoris bifida (Verrill, 1870): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris citrina (Verrill, 1879): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris columbina MacFarland, 1926: synonym of Acanthodoris nanaimoensis O'Donoghue, 1921 Acanthodoris ornata (Verrill, 1879): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris pallida Bergh, 1905: synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris pilosa ornata (Verrill, 1879): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris serpentinotus Williams & Gosliner, 1979: synonym of Acanthodoris pina Ev. Marcus & Er. Marcus, 1967 Acanthodoris stellata (Gmelin, 1791): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris stohleri Lance, 1968: synonym of Acanthodoris pina Ev. Marcus & Er. Marcus, 1967 Acanthodoris subquadrata (Alder & Hancock, 1845): synonym of Acanthodoris pilosa (Abildgaard in Müller, 1789) Acanthodoris uchidai Baba, 1935: synonym of Acanthomira uchidai (Baba, 1935) (superseded combination)
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