Abra fragilis Risso, 1826 accepted as Abra prismatica (Montagu, 1808) (original description)
Acanthias Risso, 1827 accepted as Squalus Linnaeus, 1758 (original description)
Acanthias blainville Risso, 1827 accepted as Squalus blainville (Risso, 1827) (original description)
Acanthochites Risso, 1826 accepted as Acanthochitona J. E. 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)
Aenone lithophaga Risso, 1826 (original description)
Aequorea rissoana Risso, 1827 accepted as Aequorea forskalea Péron & Lesueur, 1810 (original description)
Agenor Risso, 1826 accepted as Argulus Müller O.F., 1785 (original description)
Alpheus amethystea Risso, 1827 accepted as Periclimenes amethysteus (Risso, 1827) (original description)
Alpheus elongatus Risso, 1827 accepted as Hippolyte inermis Leach, 1816 (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)
Aphia meridionalis Risso, 1827 accepted as Aphia minuta (Risso, 1810) (original description)
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 parkinsonia Risso, 1826 accepted as Dosinia lupinus (Linnaeus, 1758) (original description)
Ascidea rustica Risso, 1826 accepted as Halocynthia papillosa (Linnaeus, 1767) (original description)
Ascidia cristata Risso, 1826 accepted as Ascidiella aspersa (Müller, 1776) (original description)
Asterias tricolor Risso, 1826 (basis of record)
Asterias verrucosa Risso, 1826 accepted as Chaetaster longipes (Bruzelius, 1805) (original description)
Atelecyclus homoiodon Risso, 1827 accepted as Atelecyclus undecimdentatus (Herbst, 1783) (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)
Belone acus Risso, 1827 accepted as Belone belone (Linnaeus, 1760) (original description)
Bithynia meridionalis Risso, 1826 accepted as Mercuria similis (Draparnaud, 1805) (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 R. A. Philippi, 1836 (original description)
Callipus Risso, 1826 (original description)
Callipus rissonius Leach, 1826 accepted as Callipus foetidissimus (Savi, 1819) (original description)
Cardium politum Risso, 1826 accepted as Laevicardium crassum (Gmelin, 1791) (original description)
Cassidaria scilla Risso, 1826 † accepted as Galeodea echinophora (Linnaeus, 1758) (original description)
Cassidaria tuberculata Risso, 1826 † accepted as Galeodea echinophora (Linnaeus, 1758) (original description)
Cerithium granulosum (Brocchi, 1814) accepted as Monophorus perversus (Linnaeus, 1758) (basis of record)
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)
Cirolana ferruginosa Risso, 1826 (original description)
Clibanarius misanthropus (Risso, 1827) accepted as Clibanarius erythropus (Latreille, 1818) (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)
Craspedosoma polydesmoides Leach, 1816 accepted as Nanogona polydesmoides (Leach, 1816) (additional source)
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)
Cyclope pellucidus Risso, 1826 accepted as Cyclope pellucida Risso, 1826 accepted as Tritia pellucida (Risso, 1826) (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)
Discorbis marginatus Risso, 1826 † (original description)
Discorbis mediterraneus Risso, 1826 (original description)
Discorbis reticulatus Risso, 1826 † (original description)
Doclea fabriciana Risso, 1827 accepted as Inachus parvirostris (Risso, 1816) (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 lutea Risso, 1826 accepted as Doris ocelligera (Bergh, 1881) (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)
Drimo Risso, 1827 accepted as Gnathophyllum Latreille, 1819 (original description)
Duvaucelia Risso, 1826 accepted as Marionia Vayssière, 1877 (original description)
Duvaucelia gracilis Risso, 1826 accepted as Marionia blainvillea (Risso, 1818) (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)

France for Callipus rissonius Leach, 1826 
France for Glomeris castaneus Risso, 1826 
France for Glomeris guttata Risso, 1826 
France for Julus aimatopodus Risso, 1826 
France for Julus annulatus Risso, 1826 
France for Julus modestus Risso, 1826 
France for Julus piceus Risso, 1826 
France for Niso eburnea Risso, 1826 † 
New Caledonian Exclusive Economic Zone for Mitrella praetermissa K. Monsecour & D. Monsecour, 2016 
Nice for Hexona parasitica Risso, 1826 
Western Mediterranean for Spongia nicaeensis Risso, 1827 
Western Mediterranean for Sycon humboldti Risso, 1827 
Western Mediterranean for Sycon humboldti Risso, 1827 

 Description

 for Hesione pantherina Risso, 1826

Live colouration is important for separating Hesione species using images so here translated is what Risso (1826) ... [details]

 Etymology

 for Hesione pantherina Risso, 1826

Not stated. Panther is derived from the Greek for big cats, now in genus Panthera. Risso mentioned H. pantherina ... [details]

 Homonymy

 for Serpula cornucopiae Gmelin, 1791

Serpula cornucopia Risso, 1826: 405 [details]

 Homonymy

 for Terebella rubra Risso, 1826

Terebella rubra Risso, better known as Amphitrite rubra, appears to be a primary junior homonym [details]

 Publication date

 for Aequorea rissoana Risso, 1827

: Publication date not precise, likely November 1827 [details]

 Taxonomy

 for Ophiothrix tricolor (Abildgaard, in O.F. Müller, 1789)

Described as Asterias tricolor by Abildgaard. Probably a synonym of Ophiothrix fragilis. May also be conspecific ... [details]

 Type locality

 for Hesione pantherina Risso, 1826

Mediterranean coast of Alpes Maritimes district, from Cannes to Menton, including Nice. Risso does not give precise ... [details]