ARMS Taxon list
"Lower Heterobranchia"
Aartsenia Warén, 1991
Aartsenia candida (Møller, 1842)
Acanthodoris J. E. Gray, 1850
Acanthodoris pilosa (Abildgaard, 1789)
Acmaeidae Forbes, 1850
Acochlidiimorpha
Acochlidioidea Küthe, 1935
Acteonimorpha
Adalaria Bergh, 1878
Adalaria loveni (Alder & Hancock, 1862)
Adalaria proxima (Alder & Hancock, 1854)
Adalaria tschuktschica A. Krause, 1885
Admete Møller, 1842
Admete couthouyi (J. C. Jay, 1839) accepted as Admete viridula (O. Fabricius, 1780)
Admete viridula (O. Fabricius, 1780)
Admetinae Troschel, 1865
Aeolidia Cuvier, 1798
Aeolidia papillosa (Linnaeus, 1761)
Aeolidida accepted as Aeolidioidea Gray, 1827
Aeolidiidae Gray, 1827
Aeolidioidea Gray, 1827
Aglajidae Pilsbry, 1895 (1847)
Akera O. F. Müller, 1776
Akera bullata O. F. Müller, 1776
Akeridae Mazzarelli, 1891
Akeroidea Mazzarelli, 1891
Alderia Allman, 1845
Alderia modesta (Lovén, 1844)
Aldisa Bergh, 1878
Aldisa zetlandica (Alder & Hancock, 1854)
Aldisidae Odhner, 1939 accepted as Cadlinidae Bergh, 1891
Alvania Risso, 1826
Alvania jeffreysi (E. Waller, 1864)
Alvania minuta (A. N. Golikov & Fedjakov, 1987) accepted as Punctulum minutum A. N. Golikov & Fedjakov, 1987 accepted as Pusillina tumidula (G. O. Sars, 1878)
Alvania moerchii (Collin, 1886)
Alvania scrobiculata (Møller, 1842)
Alvania verrilli (Friele, 1886)
Alvania wyvillethomsoni (Friele, 1877) accepted as Punctulum wyvillethomsoni (Friele, 1877)
Amaura Møller, 1842 accepted as Aartsenia Warén, 1991
Amaura candida Møller, 1842 accepted as Aartsenia candida (Møller, 1842)
Amauropsis Mörch, 1857
Amauropsis islandica (Gmelin, 1791)
Amphorina Quatrefages, 1844
Amphorina pallida (Alder & Hancock, 1842)
Ampullinidae Cossmann, 1919
Ampullospiridae L. R. Cox, 1930 † accepted as Ampullinidae Cossmann, 1919
Anaspidea accepted as Aplysiida
Anatoma S. P. Woodward, 1859
Anatoma crispata (J. Fleming, 1828)
Anatomidae J. H. McLean, 1989
Anatominae J. H. McLean, 1989 accepted as Anatomidae J. H. McLean, 1989
Ancistrolepis Dall, 1895
Ancistrolepis magna (Dall, 1895) accepted as Clinopegma magnum (Dall, 1895)
Ancula Lovén, 1846
Ancula gibbosa (Risso, 1818)
Anculinae Pruvot-Fol, 1954
Anomalisipho Dautzenberg & H. Fischer, 1912
Anomalisipho altus (S. V. Wood, 1848) † accepted as Murex pullus S. Woodward, 1833 †
Anomalisipho conulus (Aurivillius, 1885) accepted as Anomalisipho martensi (A. Krause, 1885)
Anomalisipho martensi (A. Krause, 1885)
Ansates G. B. Sowerby II, 1839 accepted as Patella Linnaeus, 1758
Ansates pellucida (Linnaeus, 1758) accepted as Patella pellucida Linnaeus, 1758
Aplysiida
Aplysiomorpha accepted as Aplysiida
Archidorididae Bergh, 1891 accepted as Dorididae Rafinesque, 1815
Archidoris Bergh, 1878 accepted as Doris Linnaeus, 1758
Archidoris pseudoargus (Rapp, 1827) accepted as Doris pseudoargus Rapp, 1827
Ariadnaria Habe, 1961
Ariadnaria borealis (Broderip & G. B. Sowerby I, 1829)
Ariadnaria conica (Møller, 1842)
Armatus A. N. Golikov, 1986
Armatus bicarinatus A. N. Golikov, 1986
Asperspina Rankin, 1979
Asperspina murmanica (Kudinskaya & Minichev, 1978)
Asperspinidae Rankin, 1979
Astyris H. Adams & A. Adams, 1853
Astyris rosacea (A. Gould, 1840)
Aulacofusus Dall, 1918
Aulacofusus brevicauda (Deshayes, 1832)
Aulacofusus esychus (Dall, 1907)
Beringiinae A. N. Golikov & Starobogatov, 1975
Beringius Dall, 1887
Beringius behringii (Middendorff, 1848)
Beringius crebricostatus (Dall, 1877)
Beringius ossiani [sic] accepted as Beringius ossiania (Friele, 1879) accepted as Beringius turtoni (W. Bean, 1834)
Beringius ossiania (Friele, 1879) accepted as Beringius turtoni (W. Bean, 1834)
Beringius turtoni (W. Bean, 1834)
Bogasonia Warén, 1989
Bogasonia gorjachevi Chaban, 1998
Borealea Korshunova, Martynov, Bakken, Evertsen, Fletcher, Mudianta, Saito, Lundin, Schrödl & Picton, 2017 accepted as Coryphella J. E. Gray, 1850
Borealea nobilis (A. E. Verrill, 1880) accepted as Coryphella nobilis A. E. Verrill, 1880
Boreocingula A. N. Golikov & Kussakin, 1974
Boreocingula castanea (Møller, 1842)
Boreocingula martyni (Dall, 1886)
Boreoscala Kobelt, 1902
Boreoscala greenlandica (Perry, 1811)
Boreoscala groenlandica (Møller, 1842) accepted as Boreoscala greenlandica (Perry, 1811)
Boreotrophon P. Fischer, 1884
Boreotrophon clathratus (Linnaeus, 1767)