Onchidoris
Introduction '''''Onchidoris''''' is a genus of dorid nudibranchs in the family Onchidorididae. One of its members is known to prey on barnacles and the others eat bryozoans. The radula contains a rachidian tooth when fully developed, but this is vestigial in some species.
Species Species within the genus ''Onchidoris'' include:* ''Onchidoris aureopuncta'' (A. E. Verrill, 1901)* ''Onchidoris bilamellata'' (Linnaeus, 1767) - type species* ''Onchidoris derjugini'' (Volodchenko, 1941)* ''Onchidoris diademata'' (Gould, 1870)* ''Onchidoris grisea'' (Gould, 1870)* ''Onchidoris hystricina'' (Bergh, 1878)* ''Onchidoris lactea'' (A. E. Verrill, 1900)* ''Onchidoris loveni'' (Alder & Hancock, 1862)* ''Onchidoris macropompa'' Martynov, Korshunova, Sanamyan & Sanamyan, 2009* ''Onchidoris maugeansis'' (Burn, 1958)* ''Onchidoris miniata'' (A. E. Verrill, 1901)* ''Onchidoris muricata'' (Müller O.F., 1776)* ''Onchidoris olgae'' (Martynov, Korshunova, Sanamyan & Sanamyan, 2009)* ''Onchidoris olivacea'' (A. E. Verrill, 1900)* ''Onchidoris perlucea'' Ortea & Moro, 2014* ''Onchidoris proxima'' (Alder & Hancock, 1854)* ''Onchidoris quadrimaculata'' (A. E. Verrill, 1900)* ''Onchidoris slavi'' (Martynov, Korshunova, Sanamyan & Sanamyan, 2009)* ''Onchidoris sparsa'' (Alder & Hancock, 1846)* ''Onchidoris tenella'' (Gould, 1870)* ''Onchidoris tschuktschica'' (Krause, 1885);Species brought into synonymy :* ''Onchidoris albonigra'' (Pruvot-Fol, 1951): synonym of ''Knoutsodonta albonigra'' (Pruvot-Fol, 1951)* ''Onchidoris aspera'' (Alder & Hancock, 1842): synonym of ''Onchidoris muricata'' (O. F. Müller, 1776)* ''Onchidoris bouvieri'' (Vayssière, 1919): synonym of ''Knoutsodonta bouvieri'' (Vayssière, 1919)* ''Onchidoris brasiliensis'' Alvim, Padula & Pimenta, 2011: synonym of ''Knoutsodonta brasiliensis'' (Alvim, Padula & Pimenta, 2011)* ''Onchidoris cervinoi'' Ortea & Urgorri, 1979: synonym of ''Knoutsodonta cervinoi'' Ortea & Urgorri, 1979* ''Onchidoris depressa'' (Alder & Hancock, 1842): synonym of ''Knoutsodonta depressa'' (Alder & Hancock, 1842)* ''Onchidoris fusca'' (Müller O.F., 1776): synonym of ''Onchidoris bilamellata'' (Linnaeus, 1767)* ''Onchidoris inconspicua'' (Alder & Hancock, 1851): synonym of ''Knoutsodonta inconspicua'' (Alder & Hancock, 1851)* ''Onchidoris leachii'' Blainville, 1816 accepted as ''Onchidoris bilamellata'' (Linnaeus, 1767)* ''Onchidoris luteocincta'' (M. Sars, 1870): synonym of  ''Diaphorodoris luteocincta'' (M. Sars, 1870)* ''Onchidoris maugeansis'' (Burn, 1958): synonym of ''Knoutsodonta maugeansis'' (Burn, 1958)* ''Onchidoris neapolitana'' (delle Chiaje, 1841): synonym of ''Knoutsodonta neapolitana'' (delle Chiaje, 1841)* ''Onchidoris oblonga'' (Alder & Hancock, 1845): synonym of ''Knoutsodonta oblonga'' (Alder & Hancock, 1845)* ''Onchidoris pusilla'' (Alder & Hancock, 1845): synonym of ''Knoutsodonta pusilla'' (Alder & Hancock, 1845)* ''Onchidoris reticulata'' Ortea, 1979: synonym of ''Knoutsodonta reticulata'' Ortea, 1979* ''Onchidoris sparsa'' (Alder & Hancock, 1846): synonym of ''Knoutsodonta sparsa'' (Alder & Hancock, 1846)* ''Onchidoris tridactila'' Ortea & Ballesteros, 1982: synonym of ''Knoutsodonta tridactila'' Ortea & Ballesteros, 1982* ''Onchidoris tuberculatus'' Hutton, 1873: synonym of ''Archidoris wellingtonensis'' (Abraham, 1877): synonym of ''Doris wellingtonensis'' Abraham, 1877
Taxonomy Many authors prefer ''Onchidorus'' Blainville, 1816 as the valid name for the genus, changed to ''Onchidoris'' (Winckworth, 1932; Bouchet & Tardy, 1976; Thompson & Brown, 1976; Cattaneo & Barletta, 1984). According to Pruvot-Fol (1954) however this latter is a nomen nudum, while the elder synonym ''Villiersia'' is a nomen oblitum (see also Abbott, 1974). This is why Odhner (1907), Pruvot-Fol (1954), Swennen (1961) and Abbott (1974) are followed in the use of ''Lamellidoris'' Alder & Hancock, 1855.
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