Cardita elegans Requien, 1848 accepted as Centrocardita aculeata (Poli, 1795) (original description)
Chemnitzia fasciata Requien, 1848 accepted as Pyrgiscus rufus (R. A. Philippi, 1836) (original description)
Delphinula duminyi Requien, 1848 accepted as Circulus striatus (R. A. Philippi, 1836) (original description)
Donax brevis Requien, 1848 accepted as Donax trunculus Linnaeus, 1758 (original description)
Emarginula huzardii var. intermedia Requien, 1848 accepted as Emarginula huzardii Payraudeau, 1826 (original description)
Eulima brevis Requien, 1848 accepted as Melanella boscii (Payraudeau, 1826) (original description)
Eulima monodon Requien, 1848 accepted as Megastomia conoidea (Brocchi, 1814) (original description)
Eulima turritellata Requien, 1848 accepted as Eulimella ventricosa (Forbes, 1844) (original description)
Eulima unidens Requien, 1848 accepted as Odostomia plicata (Montagu, 1803) (original description)
Fissurella philippii Requien, 1848 accepted as Fissurella nubecula (Linnaeus, 1758) (original description)
Fusus babelis Requien, 1848 accepted as Babelomurex cariniferus (G. B. Sowerby II, 1834) (original description)
Fusus babelis var. regalis Requien, 1848 accepted as Babelomurex cariniferus (G. B. Sowerby II, 1834) (original description)
Gadinia depressa Requien, 1848 accepted as Trimusculus mammillaris (Linnaeus, 1758) (original description)
Gadinia lateralis Requien, 1848 accepted as Trimusculus mammillaris (Linnaeus, 1758) (original description)
Haliotis lucida Requien, 1848 accepted as Haliotis tuberculata tuberculata Linnaeus, 1758 (original description)
Lithodomus inflatus Requien, 1848 accepted as Lithophaga lithophaga (Linnaeus, 1758) (original description)
Mytilus cylindraceus Requien, 1848 accepted as Mytilaster minimus (Poli, 1795) (original description)
Natica flammulata Requien, 1848 accepted as Tectonatica sagraiana (A. d'Orbigny, 1842) (original description)
Natica grisea Requien, 1848 accepted as Euspira intricata (Donovan, 1804) accepted as Payraudeautia intricata (Donovan, 1804) (original description)
Ostrea edulis var. obtusa Requien, 1848 accepted as Ostrea edulis Linnaeus, 1758 (original description)
Ovula carnea var. rosea Requien, 1848 accepted as Pseudosimnia carnea (Poiret, 1789) (original description)
Pinna squammosa Requien, 1848 accepted as Pinna nobilis Linnaeus, 1758 (original description)
Pleurotoma fusiforme Requien, 1848 accepted as Teretia teres (Reeve, 1844) (original description)
Pleurotoma reticulata var. brevis Requien, 1848 accepted as Raphitoma pupoides (Monterosato, 1884) (basis of record)
Rissoa fasciata Requien, 1848 accepted as Eatonina cossurae (Calcara, 1841) (original description)
Rissoa melanostoma Requien, 1848 accepted as Rissoa similis Scacchi, 1836 (original description)
Rissoa pupoides Requien, 1848 accepted as Ceratia proxima (Forbes & Hanley, 1850) (original description)
Tellina ovalis Requien, 1848 accepted as Peronaea planata (Linnaeus, 1758) (original description)
Trochus cyrnaeus Requien, 1848 accepted as Jujubinus montagui (W. Wood, 1828) (original description)
Venus busschaerdi Requien, 1848 accepted as Clausinella fasciata (da Costa, 1778) (original description)
Venus duminyi Requien, 1848 accepted as Clausinella fasciata (da Costa, 1778) (original description)
Venus pallei Requien, 1848 accepted as Polititapes aureus (Gmelin, 1791) (original description)
Venus picturata Requien, 1848 accepted as Polititapes aureus (Gmelin, 1791) (original description)