Abra fragilis Risso, 1826 accepted as Abra prismatica (Montagu, 1808) (original description)
Acanthochites Risso, 1826 accepted as Acanthochitona Gray, 1821 (original description)
Acanthochites aeneus Risso, 1826 accepted as Acanthochitona discrepans (T. Brown, 1827) (original description)
Acanthochites carinatus Risso, 1826 accepted as Acanthochitona crinita (Pennant, 1777) (original description)
Acanthochites communis Risso, 1826 accepted as Acanthochitona fascicularis (Linnaeus, 1767) (original description)
Alvania Risso, 1826 (original description)
Alvania boria Risso, 1826 accepted as Alvania discors (T. Brown, 1818) (original description)
Alvania costulosa Risso, 1826 accepted as Alvania lineata Risso, 1826 (original description)
Alvania crassicostata Risso, 1826 accepted as Alvania discors (T. Brown, 1818) (original description)
Alvania europea Risso, 1826 accepted as Alvania cimex (Linnaeus, 1758) (original description)
Alvania ferruginosa Risso, 1826 accepted as Alvania discors (T. Brown, 1818) (original description)
Alvania freminvillea Risso, 1826 accepted as Alvania cimex (Linnaeus, 1758) (original description)
Alvania lineata Risso, 1826 (original description)
Alvania mamillata Risso, 1826 (original description)
Alvania mediterranea Risso, 1826 accepted as Alvania discors (T. Brown, 1818) (original description)
Alvania nodulosa Risso, 1826 accepted as Alvania lineata Risso, 1826 (original description)
Alvania plicatula Risso, 1826 accepted as Rissoa membranacea (J. Adams, 1800) (original description)
Alvania pyramidata Risso, 1826 accepted as Alvania cimex (Linnaeus, 1758) (original description)
Alvania sardea Risso, 1826 accepted as Alvania discors (T. Brown, 1818) (original description)
Aphia Risso, 1827 (original description)
Aphia Risso, 1827 (additional source)
Arca argenvillea Risso, 1826 accepted as Arca tetragona Poli, 1795 accepted as Tetrarca tetragona (Poli, 1795) (original description)
Arca bonnaniana Risso, 1826 accepted as Barbatia barbata (Linnaeus, 1758) (original description)
Arca grenophia Risso, 1826 accepted as Bathyarca philippiana (Nyst, 1848) (original description)
Arca reticulata Risso, 1826 accepted as Striarca lactea (Linnaeus, 1758) (original description)
Arctoe Risso, 1826 accepted as Dosinia Scopoli, 1777 (original description)
Arctoe fulva Risso, 1826 accepted as Dosinia exoleta (Linnaeus, 1758) (original description)
Arctoe lineolata Risso, 1826 accepted as Loripes orbiculatus Poli, 1795 (original description)
Arctoe nitidissima Risso, 1826 accepted as Dosinia lupinus (Linnaeus, 1758) (original description)
Arctoe parckinsonia Risso, 1826 accepted as Dosinia lupinus (Linnaeus, 1758) (original description)
Avicula aculeata Risso, 1826 accepted as Pteria hirundo (Linnaeus, 1758) (original description)
Barnea spinosa Risso, 1826 accepted as Barnea candida (Linnaeus, 1758) (original description)
Bolma Risso, 1826 (original description)
Buccinum discors Risso, 1826 accepted as Nassarius incrassatus (Strøm, 1768) accepted as Tritia incrassata (Strøm, 1768) (original description)
Bulla modesta Risso, 1826 accepted as Haminoea hydatis (Linnaeus, 1758) (original description)
Busiris Risso, 1826 accepted as Notarchus Cuvier, 1816 (original description)
Busiris griseus Risso, 1826 accepted as Notarchus punctatus Philippi, 1836 (original description)
Cardium politum Risso, 1826 accepted as Laevicardium crassum (Gmelin, 1791) (original description)
Cerithium granulosum Risso, 1826 accepted as Bittium reticulatum (da Costa, 1778) (original description)
Cerithium lividulum Risso, 1826 (original description)
Cerithium mamillatum Risso, 1826 accepted as Bittium latreillii (Payraudeau, 1826) (original description)
Cerithium rupestre Risso, 1826 accepted as Cerithium vulgatum Bruguière, 1792 (original description)
Cerithium suturale Risso, 1826 accepted as Bittium reticulatum (da Costa, 1778) (original description)
Chama cavernosa Risso, 1826 accepted as Chama gryphoides Linnaeus, 1758 (original description)
Chauvetia mamillata (Risso, 1826) (original description)
Cirolana ferruginosa Risso, 1826 (original description)
Columbella gualteriana Risso, 1826 accepted as Columbella rustica (Linnaeus, 1758) (original description)
Columbella guilfordia Risso, 1826 accepted as Columbella rustica (Linnaeus, 1758) (original description)
Columbella punctulata Risso, 1826 accepted as Columbella rustica (Linnaeus, 1758) (original description)
Comatula annulata Risso, 1826 accepted as Antedon mediterranea (Lamarck, 1816) (original description)
Crepidula candida Risso, 1826 accepted as Crepidula unguiformis Lamarck, 1822 (original description)
Cyclope Risso, 1826 accepted as Tritia Risso, 1826 (original description)
Cyclope donavania Risso, 1826 accepted as Cyclope pellucida Risso, 1826 accepted as Tritia pellucida (Risso, 1826) (original description)
Cyclope neritoidea Risso, 1826 accepted as Cyclope neritea (Linnaeus, 1758) accepted as Tritia neritea (Linnaeus, 1758) (original description)
Cypraea guttata Risso, 1826 accepted as Zonaria pyrum (Gmelin, 1791) (original description)
Cypraea mediterranea Risso, 1826 accepted as Trivia mediterranea (Risso, 1826) (original description)
Dentalina Risso, 1826 (original description)
Dentalium striolatum Risso, 1826 accepted as Antalis vulgaris (da Costa, 1778) (original description)
Dolabella lepus Risso, 1826 accepted as Aplysia depilans Gmelin, 1791 (original description)
Donax modestus Risso, 1826 accepted as Donax venustus Poli, 1795 (original description)
Donax trifasciatus Risso, 1826 accepted as Donax semistriatus Poli, 1795 (original description)
Doris caerulea Risso, 1826 accepted as Felimare villafranca (Risso, 1818) (original description)
Doris guttata Risso, 1826 accepted as Dendrodoris grandiflora (Rapp, 1827) (original description)
Doris pellucida Risso, 1826 accepted as Cadlina pellucida (Risso, 1826) (original description)
Doris testudinaria Risso, 1826 accepted as Geitodoris planata (Alder & Hancock, 1846) (original description)
Doris virescens Risso, 1826 accepted as Dendrodoris limbata (Cuvier, 1804) (original description)
Duvaucelia Risso, 1826 (original description)
Duvaucelia gracilis Risso, 1826 accepted as Duvaucelia manicata (Deshayes, 1853) (original description)
Echinus (Toxopneustes) brevispinosus (Blainville, 1825) accepted as Sphaerechinus granularis (Lamarck, 1816) (original description)
Echinus purpureus Risso, 1826 accepted as Paracentrotus lividus (Lamarck, 1816) (original description)
Eidothea Risso, 1826 accepted as Philinopsis Pease, 1860 (original description)
Eidothea marmorata Risso, 1826 accepted as Philinopsis depicta (Renier, 1807) (original description)
Eione Risso, 1826 accepted as Nassarius (Plicarcularia) Thiele, 1929 accepted as Nassarius Duméril, 1805 (original description)
Eione sulcata Risso, 1826 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia cuvierii (Payraudeau, 1826) (original description)
Emarginula depressa Risso, 1826 accepted as Emarginula huzardii Payraudeau, 1826 (original description)
Emarginula papillosa Risso, 1826 accepted as Emarginula huzardii Payraudeau, 1826 (original description)
Emarginula reticulata Risso, 1826 accepted as Emarginula sicula J. E. Gray, 1825 (original description)
Eolidia flavescens Risso, 1826 accepted as Eubranchus farrani (Alder & Hancock, 1844) accepted as Amphorina farrani (Alder & Hancock, 1844) (original description)
Eulima Risso, 1826 (original description)
Eulima glaberrima Risso, 1826 accepted as Melanella polita (Linnaeus, 1758) (original description)
Euryale mediterraneus Risso, 1826 accepted as Astrospartus mediterraneus (Risso, 1826) (original description)
Euspira pulchella (Risso, 1826) accepted as Euspira nitida (Donovan, 1803) (original description)
Fidelis Risso, 1826 accepted as Truncatella Risso, 1826 (original description)
Fidelis theresa Risso, 1826 accepted as Truncatella subcylindrica (Linnaeus, 1767) (original description)
Fissurella mamillata Risso, 1826 accepted as Diodora graeca (Linnaeus, 1758) (original description)
Fusus conulus Risso, 1826 accepted as Euthria cornea (Linnaeus, 1758) (original description)
Fusus fragilis Risso, 1826 accepted as Aporrhais pespelecani (Linnaeus, 1758) (original description)
Fusus glaber Risso, 1826 accepted as Mitrella scripta (Linnaeus, 1758) (original description)
Fusus provencalis Risso, 1826 accepted as Hadriania craticulata Bucquoy & Dautzenberg, 1882 accepted as Gracilipurpura craticulata Bucquoy & Dautzenberg, 1882 (original description)
Gastrochaena pelagica Risso, 1826 accepted as Rocellaria dubia (Pennant, 1777) (original description)
Gibbula Risso, 1826 (original description)
Gibbula bicolor Risso, 1826 accepted as Gibbula ardens (Salis Marschlins, 1793) (original description)
Gibbula depressa Risso, 1826 accepted as Gibbula varia (Linnaeus, 1758) accepted as Steromphala varia (Linnaeus, 1758) (original description)
Gibbula desserea Risso, 1826 accepted as Gibbula umbilicaris (Linnaeus, 1758) accepted as Steromphala umbilicaris (Linnaeus, 1758) (original description)
Gibbula mediterranea Risso, 1826 accepted as Gibbula umbilicaris (Linnaeus, 1758) accepted as Steromphala umbilicaris (Linnaeus, 1758) (original description)
Gibbula morio Risso, 1826 accepted as Clanculus jussieui (Payraudeau, 1826) (original description)
Gibbula pygmaea Risso, 1826 accepted as Gibbula racketti (Payraudeau, 1826) accepted as Steromphala racketti (Payraudeau, 1826) (original description)
Gibbula rupestris Risso, 1826 accepted as Clanculus cruciatus (Linnaeus, 1758) (original description)
Gibbula sanguinea Risso, 1826 accepted as Gibbula ardens (Salis Marschlins, 1793) (original description)
Gibbula schroeterius Risso, 1826 accepted as Clanculus jussieui (Payraudeau, 1826) (original description)