• Acus Catesby, 1771 (unaccepted) [Family: Lepisosteidae, Phylum: Chordata]
• Acus Chen, Yang & Wilson, 1989 accepted as Neoacus Dmitriev, 2020 [Family: Achilidae, Phylum: Arthropoda]
• Acus Gray, 1847 accepted as Oxymeris Dall, 1903 [Family: Terebridae, Phylum: Mollusca]
• Acus Müller, 1766 accepted as Belone Cuvier, 1816 [Family: Belonidae, Phylum: Chordata]
• Acus Müller, 1774 accepted as Belone Cuvier, 1816 [Family: Belonidae, Phylum: Chordata]
• Acus Plumier in Lacepède, 1803 accepted as Sphyraena Artedi in Röse, 1793 [Family: Sphyraenidae, Phylum: Chordata]
• Acus Swainson, 1839 accepted as Entelurus Duméril, 1870 [Family: Syngnathidae, Phylum: Chordata]
• Acus Tsao & Zhao, 1974 † [Family: , Phylum: Animalia incertae sedis]
• Acus Valmont de Bomare, 1791 accepted as Syngnathus Linnaeus, 1758 [Family: Syngnathidae, Phylum: Chordata]
• Acus acutula Chen & Yang & Wilson, 1989
• Acus albidus (Gray, 1834) accepted as Oxymeris albida (Gray, 1834)
• Acus antarctica E.A. Smith, 1873 accepted as Euterebra tristis (Deshayes, 1859)
• Acus areolatus (Link, 1807) accepted as Oxymeris areolata (Link, 1807)
• Acus assimilis Angas, 1867 accepted as Euterebra tristis (Deshayes, 1859)
• Acus bicolor Angas, 1867 accepted as Euterebra tristis (Deshayes, 1859)
• Acus caledonicus (G.B. Sowerby III, 1909) accepted as Oxymeris caledonica (G.B. Sowerby III, 1909)
• Acus chloratus (Lamarck, 1822) accepted as Oxymeris chlorata (Lamarck, 1822)
• Acus concavus (Say, 1826) accepted as Terebra concava (Say, 1826)
• Acus crenulatus (Linnaeus, 1758) accepted as Oxymeris crenulata (Linnaeus, 1758)
• Acus dillwynii (Deshayes, 1859) accepted as Oxymeris dillwynii (Deshayes, 1859)
• Acus dimidiatus (Linnaeus, 1758) accepted as Oxymeris dimidiata (Linnaeus, 1758)
• Acus dislocatus (Say, 1822) accepted as Terebra dislocata (Say, 1822)
• Acus eburnea (Hinds, 1844) accepted as Perirhoe eburnea (Hinds, 1844)
• Acus fatua (Hinds, 1844) accepted as Oxymeris fatua (Hinds, 1844)
• Acus felinus (Dillwyn, 1817) accepted as Oxymeris felina (Dillwyn, 1817)
• Acus lineopunctatus Bozzetti, 2008
• Acus maculatus (Linnaeus, 1758) accepted as Oxymeris maculata (Linnaeus, 1758)
• Acus rushii (Dall, 1889) accepted as Terebra rushii Dall, 1889
• Acus senegalensis (Lamarck, 1822) accepted as Oxymeris senegalensis (Lamarck, 1822)
• Acus strigatus (G.B. Sowerby I, 1825) accepted as Oxymeris strigata (G.B. Sowerby I, 1825)
• Acus suffusus (Pease, 1869) accepted as Oxymeris suffusa (Pease, 1869)
• Acus thaanumi (Pilsbry, 1921) accepted as Oxymeris costellifera (Pease, 1869)
• Acus trochlea (Deshayes, 1857) accepted as Oxymeris trochlea (Deshayes, 1857)
• Acus troendlei (Bratcher, 1981) accepted as Oxymeris troendlei (Bratcher, 1981)
• Acusa Fibiger, 2011
• Acusana DeLong, 1942
• Acuscercus Cadena-Castañeda & Braun in Cadena-Castañeda et al., 2020
• Acusicola Cressey, 1970
• Acusicola brasiliensis Amado & C.E.F. Rocha, 1996
• Acusicola cunula Cressey, 1970
• Acusicola joturicola El-Rashidy & Boxshall, 1999
• Acusicola lycengraulidis Thatcher & Boeger, 1983
• Acusicola mazatlanesis El-Rashidy & Boxshall, 1999
• Acusicola minuta Araujo & Boxshall, 2001
• Acusicola paracunula Amado & C.E.F. Rocha, 1996
• Acusicola pellonidis Thatcher & Boeger, 1983
• Acusicola rogeri Amado & C.E.F. Rocha, 1996
• Acusicola rotunda Amado & C.E.F. Rocha, 1996
• Acusicola spinuloderma El-Rashidy & Boxshall, 1999
• Acusicola spinulosa Amado & C.E.F. Rocha, 1996
• Acusicola tenax (Roberts, 1965)
• Acusicola tucunarense Thatcher, 1984
• Acusidae Gray, 1853 accepted as Terebridae Mörch, 1852
• Acusilas Simon, 1895
• Acusilas africanus Simon, 1895
• Acusilas coccineus Simon, 1895
• Acusilas dahoneus Barrion & Litsinger, 1995
• Acusilas gentingensis Murphy & Murphy, 1983
• Acusilas lepidus (Thorell, 1898)
• Acusilas malaccensis Murphy & Murphy, 1983
• Acusilenchus Shahina & Maqbool, 1990 accepted as Neopsilenchus Thorne & Malek, 1968
• Acusmonas B.V. Skvortzov, 1969
• Acusmonas pluvialis Skvortzov
• Acusmonss B.V. Skvortzov, 1969 accepted as Astasia Dujardin, 1841
• Acuspis Gumppenberg, 1893 (uncertain)
• Acusporidatina †
• Acusta Martens, 1860 (uncertain)
• Acustelma Baillon, 1889 accepted as Pentopetia Decaisne in Alph. de Candolle, 1844
• Acuston Rafinesque, 1838 (uncertain)