Adeorbis imperspicuus Monterosato, 1875 accepted as Tjaernoeia exquisita (Jeffreys, 1883) (original description)
Arca polii var. grandis Monterosato, 1875 accepted as Anadara corbuloides (Monterosato, 1881) (original description)
Bela recondita Locard, 1897 accepted as Gymnobela pyrrhogramma (Dautzenberg & H. Fischer, 1896) accepted as Austrobela pyrrhogramma (Dautzenberg & H. Fischer, 1896) (additional source)
Cadulus attenuatus Monterosato, 1875 (original description)
Cardium papillosum var. obliquata Monterosato, 1875 accepted as Papillicardium papillosum (Poli, 1791) (original description)
Cerithium angustissimum Forbes, 1844 accepted as Metaxia metaxa (Delle Chiaje, 1828) (source of synonymy)
Chemnitzia calameli Jousseaume, 1877 (additional source)
Columbella (Mitrella) scripta var. brevis Monterosato, 1875 accepted as Mitrella scripta (Linnaeus, 1758) (original description)
Columbella rustica var. lactea Monterosato, 1875 accepted as Columbella rustica (Linnaeus, 1758) (original description)
Defrancia reticulata var. nivea Monterosato, 1875 accepted as Raphitoma nivea (J. T. Marshall, 1906) (basis of record)
Dentalium ovulum var. attenuata Monterosato, 1875 † accepted as Cadulus ovulum (R. A. Philippi, 1844) † (original description)
Eulima subulata var. alba Monterosato, 1875 (original description)
Eulima subulata var. minor Monterosato, 1875 accepted as Eulima glabra (da Costa, 1778) (original description)
Helonyx jeffreysii Monterosato, 1875 accepted as Cadulus jeffreysii (Monterosato, 1875) (original description)
Helonyx subfusiformis var. abyssicola Monterosato, 1875 accepted as Cadulus subfusiformis (M. Sars, 1865) (original description)
Leda (Yoldia) microscopica Monterosato, 1875 accepted as Microgloma pusilla (Jeffreys, 1879) (original description)
Lima subovata Monterosato, 1875 accepted as Limatula subovata (Monterosato, 1875) (original description)
Mathilda cochlaeformis Brugnone, 1873 (source of synonymy)
Mathilda elegantissima (O. G. Costa, 1861) accepted as Mathilda cochlaeformis Brugnone, 1873 (source of synonymy)
Mathilda granolirata Brugnone, 1873 accepted as Mathilda cochlaeformis Brugnone, 1873 (additional source)
Mitra littoralis Forbes, 1844 accepted as Vexillum granum (Forbes, 1844) accepted as Pusia granum (Forbes, 1844) (additional source)
Montacuta convexa Monterosato, 1875 (original description)
Murex acanthophorus Monterosato, 1875 accepted as Ocinebrina hispidula (Pallary, 1904) accepted as Ocenebra hispidula (Pallary, 1904) (original description)
Mytilus (Dacrydium) hyalinus Monterosato, 1875 accepted as Dacrydium hyalinum (Monterosato, 1875) (original description)
Mytilus lineatus var. minorsolida Monterosato, 1875 accepted as Mytilaster lineatus (Gmelin, 1791) (original description)
Neolepton Monterosato, 1875 (original description)
Odostomia (Eulimella) debilis Monterosato, 1875 accepted as Bacteridium macilentum (Monterosato, 1878) (original description)
Odostomia (Eulimella) superflua Monterosato, 1875 accepted as Eulimella superflua (Monterosato, 1875) (original description)
Odostomia (Turbonilla) micans Monterosato, 1875 accepted as Turbonilla micans (Monterosato, 1875) (original description)
Odostomia (Turbonilla) multilirata Monterosato, 1875 accepted as Turbonilla multilirata (Monterosato, 1875) (original description)
Odostomia (Turbonilla) venusta Monterosato, 1875 accepted as Turbonilla amoena (Monterosato, 1878) (original description)
Odostomia bulimulus Monterosato, 1874 (original description)
Ovula carnea var. albida Monterosato, 1875 accepted as Pseudosimnia carnea (Poiret, 1789) (original description)
Phaseolus Monterosato, 1875 (original description)
Phaseolus tumidulus Monterosato, 1875 accepted as Microgloma tumidula (Monterosato, 1880) accepted as Microgloma pusilla (Jeffreys, 1879) (original description)
Phaseolus tumidulus Monterosato, 1875 accepted as Microgloma tumidula (Monterosato, 1880) accepted as Microgloma pusilla (Jeffreys, 1879) (basis of record)
Pleurotoma indistincta Monterosato, 1875 accepted as Mangiliella indistincta (Monterosato, 1875) accepted as Mangelia indistincta (Monterosato, 1875) accepted as Mangelia striolata Risso, 1826 (original description)
Rissoa elegantissima Monterosato, 1875 accepted as Alvania elegantissima (Monterosato, 1875) (original description)
Scalaria fusticulus Monterosato, 1875 accepted as Opalia abbotti Clench & R. D. Turner, 1952 (original description)
Scalaria fusticulus Monterosato, 1875 accepted as Opalia abbotti Clench & R. D. Turner, 1952 (basis of record)
Scalaria solidula Monterosato, 1875 accepted as Cylindriscala acus (R. B. Watson, 1883) (original description)
Spirialis diversa Monterosato, 1875 accepted as Peracle diversa (Monterosato, 1875) (original description)
Spondylus gaederopus var. inermis Monterosato, 1875 accepted as Spondylus gaederopus Linnaeus, 1758 (basis of record)
Tiberia Monterosato, 1875 accepted as Tiberia Jeffreys, 1884 (basis of record)
Trochus cossurensis Monterosato, 1875 accepted as Gibbula rarilineata (Michaud, 1829) accepted as Steromphala rarilineata (Michaud, 1829) (original description)

Italy for Dentalium ovulum var. attenuata Monterosato, 1875 †