• Aaadonta angaurana Solem, 1976: not applicable
• Aaadonta constricta (C. Semper, 1874): not applicable
• Aaadonta fuscozonata (R. H. Beddome, 1889): not applicable
• Aaadonta irregularis (C. Semper, 1874): not applicable
• Aaadonta kinlochi Solem, 1976: not applicable
• Aaadonta pelewana Solem, 1976: not applicable
• Aartsenia arctica (Dall & Bartsch, 1909): not applicable
• Aartsenia candida (Møller, 1842): not applicable
• Aartsenia japonica (A. Adams, 1860): not applicable
• Aartsenia martensi (Dall & Bartsch, 1906): not applicable
• Aartsenia pupiformis (P. P. Carpenter, 1865): not applicable
• Aartsenia sagamiensis Kuroda & T. Habe, 1971: not applicable
• Aartsenia sasagensis (Nomura, 1939) †: not applicable
• Aartsenia sikisimana (Nomura, 1939) †: not applicable
• Abasia inflata Cressey & Cressey, 1979: not applicable
• Abasia pillaii Cressey & Cressey, 1979: not applicable
• Abasia platyrostris Pillai, 1963: not applicable
• Abasia pseudorostris Wilson C.B., 1908: not applicable
• Abasia pusilla Cressey & Cressey, 1979: not applicable
• Abasia tripartita (Shiino, 1955): not applicable
• Abatetia robusta (Parent, 1933): not applicable
• Abathymermis acuticauda Rubzov, 1974: not applicable
• Abathymermis adventitia Rubzov & Kokordyak, 1973: not applicable
• Abathymermis arenaria (Coman, 1961) Rubzov, 1971: not applicable
• Abathymermis bissacea Rubzov, 1973: not applicable
• Abathymermis bissoidea Rubzov, 1972: not applicable
• Abathymermis brevicauda (Rubzov, 1972): not applicable
• Abathymermis fiseri Johnson & Kleve, 1995: not applicable
• Abathymermis ivaschkini Gafurov, 1980: not applicable
• Abathymermis microamphidis Rubzov, 1972: not applicable
• Abathymermis oesophaga Gafurov & An, 1989: not applicable
• Abathymermis ovtschinnikovi Ipatjeva & Pimenova, 1980: not applicable
• Abathymermis oxycerca (Steiner, 1929): not applicable
• Abathymermis parvula Rubzov, 1976: not applicable
• Abathymermis shocki Johnson & Kleve, 1995: not applicable
• Abathymermis tenuicauda (Rubzov, 1967): not applicable
• Abbottella crataegus Watters, 2016: not applicable
• Abbottella domingoensis Bartsch, 1946: not applicable
• Abbottella haitensis Bartsch, 1946: not applicable
• Abbottella moreletiana (Crosse, 1873): not applicable
• Abbottipoma abbotti (Bartsch, 1946): not applicable
• Abbottipoma crossei (Pilsbry, 1933): not applicable
• Abbottipoma gabbi (Crosse, 1873): not applicable
• Abbreviata (Abbreviata) abbreviata (Rudolphi, 1819): not applicable
• Abbreviata (Abbreviata) kazachstanica Markov & Paraskiv, 1956: not applicable
• Abbreviata (Abbreviata) turkomanica Andrushko & Markov, 1956: not applicable
• Abbreviata baltazardi Chabaud, 1953: not applicable
• Abchasohela pachnodes (O. Boettger, 1884): not applicable
• Abchasohela pergranulata (Hausdorf, 2001): not applicable
• Abchasohela septentrionalis (Hausdorf, 2001): not applicable
• Abchasohela stephaniae (Hudec & Lezhawa, 1970): not applicable
• Abebaioscia troglodytes Vandel, 1973: not applicable
• Abergasilus amplexus Hewitt, 1978: not applicable
• Aberrapex arrhynchum (Brooks, Mayes & Thorson, 1981) Jensen, 2001: not applicable
• Aberrapex catarinensis Quadros, 2024: not applicable
• Aberrapex ludmilae Menoret, Mutti & Ivanov, 2017: not applicable
• Aberrapex manjajiae Jensen, 2006: not applicable
• Aberrapex panamensis Quadros, 2024: not applicable
• Aberrapex sanmartini Menoret, Mutti & Ivanov, 2017: not applicable
• Aberrapex senticosus Jensen, 2001: not applicable
• Aberrapex vitalemuttiorum Menoret, Mutti & Ivanov, 2017: not applicable
• Aberrapex weipaensis Koch, Jensen & Caira, 2012: not applicable
• Abgrallaspis cyanophylli (Signoret, 1869): not applicable
• Abida ateni E. Gittenberger, 1973: not applicable
• Abida attenuata (Fagot, 1887): not applicable
• Abida bigerrensis (Moquin-Tandon, 1856): not applicable
• Abida bythiniformis (K. Miller, 1907) †: not applicable
• Abida cylindrica (Michaud, 1829): not applicable
• Abida gittenbergeri Bößneck, 2000: not applicable
• Abida occidentalis (Fagot, 1888): not applicable
• Abida partioti (Saint-Simon, 1848): not applicable
• Abida polyodon (Draparnaud, 1801): not applicable
• Abida pyrenaearia (Michaud, 1831): not applicable
• Abida secale (Draparnaud, 1801): not applicable
• Abida servasensis (Fontannes, 1884) †: not applicable
• Abida vasconica (Kobelt, 1882): not applicable
• Abida vergniesiana (Küster, 1847): not applicable
• Abida vouastensis (Raspail, 1909) †: not applicable
• Abirovulva insolita Hunt, 2002: not applicable
• Ablabesmyia mala (Hutton, 1902): not applicable
• Abortipedia indica Unnithan, 1962: not applicable
• Abothrium gadi Van Beneden, 1870: not applicable
• Abroscelis anchoralis (Chevrolat, 1845): not applicable
• Absonifibula bychowskyi Lawler & Overstreet, 1976: not applicable
• Absonifibula estuarina Santos & Timi, 2009: not applicable
• Abuladzugnia gutterae (Ortlepp, 1963) Spasskii, 1973: not applicable
• Abursanema iranicum Yaghoubi, Pourjam, Pedram, Siddiqi & Atighi, 2014: not applicable
• Abursanema quadrilineatum Qing, Slos, Claeys & Bert, 2017: not applicable
• Abyssoaclis alagoensis J. Barros, Mello, F. Barros, S. Lima, Santos, Cabral & Padovan, 2003: not applicable
• Abyssopedunculus brevis (Andres & Overstreet, 2013) Martin, Huston, Cutmore & Cribb, 2019: not applicable
• Abyssopontius altus Stock, 1985: not applicable
• Abyssotaurus vermiambatus Brenke, Fanenbruck & George, 2018: not applicable
• Acaenodera nautili Bray & Justine, 2011: not applicable
• Acaenodera placophora Manter & Pritchard, 1960: not applicable
• Acaenodera spinosior Etchegoin, Lanfranchi, Cremonte & Timi, 2006: not applicable
• Acaenomolgus gottoi Stock, 1995: not applicable
• Acaenomolgus protulae (Stock, 1959): not applicable
• Acaenomolgus serpulae (Stock, 1960): not applicable
• Acaeroplastes amicitiae Pollo Zorita & Dalens, 1982: not applicable
• Acaeroplastes delattini Verhoeff, 1951: not applicable