Abroscaphus Laurent, 1940 (verified source for family)
Acantheledone Fort, 1941 (verified source for family)
Acanthineura Agassiz, 1846 accepted as Acanthonevra Macquart, 1843 (verified source for family)
Acanthocausus Fritz & Toro, 1976 (verified source for family)
Acanthomyia Schiner, 1860 (verified source for family)
Acherontiellina Delamare-Deboutteville, 1948 accepted as Acherontiella Absolon, 1913 (verified source for family)
Acherontiellina Salmon, 1964 accepted as Acherontiella Absolon, 1913 (verified source for family)
Achlyomyia Pleske, 1922 (verified source for family)
Achrochaeta Perty, 1833 accepted as Acrochaeta Wiedemann, 1830 (verified source for family)
Acidigona Coquillett, 1910 accepted as Acidogona Loew, 1873 (verified source for family)
Acidura Agassiz, 1846 accepted as Aciura Robineau-Desvoidy, 1830 (verified source for family)
Acmaeopsilla Casey, 1913 accepted as Cortodera Mulsant, 1863 (verified source for family)
Acrololigo Grimpe, 1921 accepted as Alloteuthis Wülker, 1920 (verified source for family)
Acruroteuthis Berry, 1920 accepted as Alloteuthis Wülker, 1920 (verified source for family)
Adenostomocoris Schuh & Schwartz, 2004 (verified source for family)
Admontiopsis Townsend, 1915 (verified source for family)
Adopoea Billberg, 1820 (verified source for family)
Adoryphorophaga Townsend, 1931 (verified source for family)
Aegineta Gegenbaur, 1856 (verified source for family)
Afrobisium Beier, 1932 (verified source for family)
Afrogorytes Menke, 1967 (verified source for family)
Afrololigo Brakoniecki, 1986 (verified source for family)
Afrololigo Alexeyev, 1992 accepted as Lolliguncula Steenstrup, 1881 (verified source for family)
Agenora Cameron, 1909 (verified source for family)
Agliscra Haeckel, 1879 (verified source for family)
Aknisus McAtee, 1919 (verified source for family)
Alaskophyto Townsend, 1915 (verified source for family)
Alcletha Kirkaldy, 1900 (verified source for family)
Aldrichocyptera Townsend, 1936 (verified source for family)
Alepomyiodes Sibley, 1926 (verified source for family)
Alexandriaria Garrett, 1922 (verified source for family)
Alfredus Schmidt, 1979 (verified source for family)
Algaroda Dall, 1918 accepted as Littorina Férussac, 1822 (verified source for family)
Alinia Antropov, 1993 (verified source for family)
Allogorytes Bohart, 2000 (verified source for family)
Alloposina Grimpe, 1922 accepted as Haliphron Steenstrup, 1859 (verified source for family)
Alphapachygaster Pleske, 1922 (verified source for family)
Alphoxycera Pleske, 1925 (verified source for family)
Alvinia Monterosato, 1884 accepted as Alvania Risso, 1826 (verified source for family)
Amauromyia Pleske, 1922 (verified source for family)
Ambitidacus Munro, 1984 (verified source for family)
Americodema Henry, 2000 (verified source for family)
Amicoplidea Ashmead, 1900 (verified source for family)
Amiskwia Walcott, 1911 † (verified source for family)
Ammophylus Latreille, 1802 accepted as Ammophila Kirby, 1798 (verified source for family)
Ammopsen Krombein, 1959 (verified source for family)
Amphidesma Lamarck, 1818 accepted as Semele Schumacher, 1817 (verified source for family)
Anacanthoberis Brunetti, 1912 (verified source for family)
Anacrabro Packard, 1866 (verified source for family)
Anaegires Odhner, 1934 accepted as Aegires Lovén, 1844 (verified source for family)
Analysson Krombein, 1985 (verified source for family)
Anaporia Townsend, 1919 (verified source for family)
Anatrytone Dyar, 1905 (verified source for family)
Anaxyrus Tschudi, 1845 (verified source for family)
Ancistrocampta Felder & Felder, 1862 (verified source for family)
Ancistromma Fox, 1894 (verified source for family)
Ancyclostoma accepted as Ancylostoma Dubini, 1843 (basis of record)
Ancylodacus Munro, 1984 (verified source for family)
Anisocheirus Westwood, 1832 (verified source for family)
Anisoctus Rafinesque, 1840 (verified source for family)
Ankylotylus Knight, 1968 (verified source for family)
Anomalurodon Matschie, 1914 (verified source for family)
Anostomella Martens, 1867 (verified source for family)
Anthomaster Scudder, 1872 (verified source for family)
Antistrophus Walsh, 1869-70 (verified source for family)
Antomartinezius Fritz, 1955 (verified source for family)
Antron Kinsey, 1930 (verified source for family)
Antronicippe Stock & Iliffe, 1990 (verified source for family)
Anulotaia Brandt, 1968 † (verified source for family)
Anzamyia Reinhard, 1960 (verified source for family)
Aoptodacus Munro, 1984 (verified source for family)
Apachemyia Townsend, 1908 (verified source for family)
Apallaga Strand, 1911 (verified source for family)
Aphilanthops Patton, 1881 (verified source for family)
Apinops Coquillett, 1897 (verified source for family)
Apycnemia Leclercq, 1961 (verified source for family)
Apyrrothrix Lindsey, 1921 (verified source for family)
Araucastigmus Finnamore, 1995 (verified source for family)
Arctonetta Gray, 1856 (verified source for family)
Arctostaphylocoris Schuh & Schwartz, 2004 (verified source for family)
Arefbea Jessop, 1983 (verified source for family)
Argyrammophila Gussakovskiĭ, 1928 (verified source for family)
Arigorytes Rohwer, 1912 (verified source for family)
Armigerus Clessin, 1884 (verified source for family)
Arnoldita Patr, 1948 (verified source for family)
Aroliagorytes Bohart, 2000 (verified source for family)
Arotis Mabille, 1904 accepted as Mnaseas Godman, 1901 (verified source for family)
Arthroleptulus Laurent, 1940 (verified source for family)
Arzamopsis Dyar, 1922 (verified source for family)
Asolene d'Orbigny, 1838 (verified source for family)
Asolene Troschel, 1838 accepted as Asolene d'Orbigny, 1838 (verified source for family)
Aspilomyia Hendel, 1907 accepted as Neaspilota Osten-Sacken, 1878 (verified source for family)
Asteliamiris Schwartz & Polhemus, 2000 (verified source for family)
Astenophylax Ulmer, 1907 (verified source for family)
Asthenidea Reuter, 1885 (verified source for family)
Ateleomorpha Warren, 1926 (verified source for family)
Atomosira Uhler, 1871 (verified source for family)
Atractouclesia Townsend, 1931 (verified source for family)
Atylodes Gistel, 1868 (verified source for family)
Aubaeina Enderlein, 1937 (verified source for family)