Argonauta uniumbilicatus O. G. Costa, 1830 accepted as Scissurella costata A. d'Orbigny, 1824 (original description)
Buccinum elegans O. G. Costa, 1830 accepted as Nassarius cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (original description)
Buccinum flexuosum O. G. Costa, 1830 accepted as Tritia cuvierii (Payraudeau, 1826) accepted as Tritia corrugata (Brocchi, 1814) (original description)
Buccinum semiplicatum O. G. Costa, 1830 accepted as Nassarius corniculum (Olivi, 1792) accepted as Tritia corniculum (Olivi, 1792) (original description)
Bulla triticea (Lamarck, 1810) sensu O. G. Costa, 1830 accepted as Pseudosimnia carnea (Poiret, 1789) (basis of record)
Cerithium fuscatum (Linnaeus, 1758) sensu O. G. Costa, 1830 accepted as Cerithium mediterraneum Deshayes, 1843 accepted as Cerithium lividulum Risso, 1826 (basis of record)
Cerithium inversum O. G. Costa, 1830 accepted as Monophorus perversus (Linnaeus, 1758) (original description)
Chiton euplaeae O. G. Costa, 1830 accepted as Callochiton doriae (Capellini, 1859) (original description)
Chiton rubicundus O. G. Costa, 1830 accepted as Chiton corallinus (Risso, 1826) accepted as Rhyssoplax corallina (Risso, 1826) (original description)
Chiton stigma O. G. Costa, 1830 accepted as Callochiton septemvalvis (Montagu, 1803) (original description)
Cyclas sebetia O. G. Costa, 1830 accepted as Bornia sebetia (O. G. Costa, 1830) (original description)
Cypraea amethistina O. G. Costa, 1830 accepted as Luria lurida (Linnaeus, 1758) (original description)
Cypraea lurida var. albida O. G. Costa, 1830 accepted as Luria lurida (Linnaeus, 1758) (original description)
Cypraea lurida var. amethystina O. G. Costa, 1830 accepted as Luria lurida lurida (Linnaeus, 1758) (original description)
Cypraea lurida var. rufescens O. G. Costa, 1830 accepted as Luria lurida lurida (Linnaeus, 1758) (original description)
Cypraea lurida var. virescens O. G. Costa, 1830 accepted as Luria lurida lurida (Linnaeus, 1758) (original description)
Cypraea umbilicalis O. G. Costa, 1830 accepted as Trivia arctica (Pulteney, 1799) (original description)
Dentalium splendens O. G. Costa, 1830 accepted as Fustiaria rubescens (Deshayes, 1826) (original description)
Emarginula adriatica O. G. Costa, 1830 (original description)
Gastrochaena tarentina O. G. Costa, 1830 accepted as Rocellaria dubia (Pennant, 1777) (original description)
Haliotis marmorata Linnaeus, 1758 sensu O. G. Costa, 1830 accepted as Haliotis tuberculata lamellosa Lamarck, 1822 accepted as Haliotis tuberculata Linnaeus, 1758 (basis of record)
Janthina bicolor O. G. Costa, 1830 accepted as Janthina janthina (Linnaeus, 1758) (original description)
Odoncineta O. G. Costa, 1830 accepted as Thracia (Odoncineta) O. G. Costa, 1830 represented as Thracia Blainville, 1824 (original description)
Peronaea textilis O. G. Costa, 1830 accepted as Thracia phaseolina (Lamarck, 1818) (original description)
Psammobia cumana (O. G. Costa, 1830) accepted as Macomopsis pellucida (Spengler, 1798) accepted as Macomopsis cumana (O. G. Costa, 1830) (basis of record)
Psammotaea striata O. G. Costa, 1830 accepted as Abra prismatica (Montagu, 1808) (original description)
Spondylus gussonii O. G. Costa, 1830 (original description)
Tellina cumana O. G. Costa, 1830 accepted as Macomopsis cumana (O. G. Costa, 1830) (original description)
Tellina exigua var. alba O. G. Costa, 1830 accepted as Tellina tenuis da Costa, 1778 accepted as Macomangulus tenuis (da Costa, 1778) (original description)
Tellina exigua var. flavescens O. G. Costa, 1830 accepted as Tellina tenuis da Costa, 1778 accepted as Macomangulus tenuis (da Costa, 1778) (original description)
Tellina mediterranea O. G. Costa, 1830 accepted as Lentidium mediterraneum (O. G. Costa, 1830) (original description)
Tellina olimpica O. G. Costa, 1830 accepted as Varicorbula gibba (Olivi, 1792) (original description)
Trochus lineolatus O. G. Costa, 1830 accepted as Gibbula divaricata (Linnaeus, 1758) accepted as Steromphala divaricata (Linnaeus, 1758) (original description)
Trochus varians O. G. Costa, 1830 accepted as Gibbula divaricata (Linnaeus, 1758) accepted as Steromphala divaricata (Linnaeus, 1758) (original description)
Turbinella eburnea O. G. Costa, 1830 accepted as Pollia dorbignyi (Payraudeau, 1826) accepted as Aplus dorbignyi (Payraudeau, 1826) (original description)
Venus petagnae O. G. Costa, 1830 accepted as Laevastarte fusca fusca (Poli, 1795) (original description)
Venus tenorii O. G. Costa, 1830 accepted as Venerupis geographica (Gmelin, 1791) (original description)
Voluta cornicularis (Lamarck, 1822) accepted as Mitra cornicula (Linnaeus, 1758) accepted as Episcomitra cornicula (Linnaeus, 1758) (basis of record)
Voluta oryza O. G. Costa, 1830 accepted as Ringicula auriculata (Ménard de la Groye, 1811) (original description)