• Abyssaranea Wilson & Hessler, 1974
• Abyssaranea minuta Golovan & Malyutina in Golovan, Malyutina & Sharina, 2023
• Abyssaranea rupis Wilson & Hessler, 1974
• Abyssianira Menzies, 1956
• Abyssianira acutilobi Doti & Roccatagliata, 2006
• Abyssianira argentenensis Menzies, 1962
• Abyssianira bathyalis Just, 1990
• Abyssianira dentifrons Menzies, 1956
• Abyssianira lingula Doti & Roccatagliata, 2006
• Abyssianira tasmaniensis Just, 1990
• Abyssianiridae Menzies, 1956 accepted as Paramunnidae Vanhöffen, 1914
• Abyssijaera Menzies, 1962 accepted as Katianira Hansen, 1916
• Abyssijaera acarina Menzies, 1962 accepted as Katianira acarina (Menzies, 1962)
• Abyssoniscus Birstein, 1971
• Abyssoniscus ovalis Birstein, 1971
• Acanthamunnopsis Schultz, 1978
• Acanthamunnopsis hystrix Schultz, 1978
• Acanthamunnopsis longicornis (Hansen, 1895)
• Acanthamunnopsis milleri Wilson, 1982
• Acanthamunnopsis spinifer (Vanhöffen, 1914)
• Acanthaspidae Menzies, 1962 accepted as Acanthaspidiidae Menzies, 1962
• Acanthaspidia Stebbing, 1893 accepted as Iolanthe Beddard, 1886
• Acanthaspidia acanthonotus (Beddard, 1886) accepted as Iolanthe acanthonotus Beddard, 1886
• Acanthaspidia bifurcata Menzies, 1962 accepted as Iolanthe bifurcata (Menzies, 1962)
• Acanthaspidia bifurcatoides Vasina & Kussakin, 1982 accepted as Iolanthe bifurcatoides (Vasina & Kussakin, 1982)
• Acanthaspidia curtispinosa Vasina & Kussakin, 1982 accepted as Iolanthe curtispinosa (Vasina & Kussakin, 1982)
• Acanthaspidia decorata (Hansen, 1895) accepted as Iolanthe decorata Hansen, 1895
• Acanthaspidia drygalskii Vanhöffen, 1914 accepted as Iolanthe drygalskii (Vanhöffen, 1914)
• Acanthaspidia hanseni Birstein, 1963 accepted as Iolanthe hanseni (Birstein, 1963)
• Acanthaspidia iolanthoidea Vasina & Kussakin, 1982 accepted as Iolanthe iolanthoidea (Vasina & Kussakin, 1982)
• Acanthaspidia laevis Chardy, 1975 accepted as Iolanthe laevis (Chardy, 1975)
• Acanthaspidia longiramosa Vasina & Kussakin, 1982 accepted as Iolanthe longiramosa (Vasina & Kussakin, 1982)
• Acanthaspidia matsi Timm, Kaiser & Brandt, 2013 accepted as Iolanthe matsi (Timm, Kaiser & Brandt, 2013)
• Acanthaspidia mucronata (Menzies & Schultz, 1968) accepted as Iolanthe mucronata (Menzies & Schultz, 1968)
• Acanthaspidia namibia Brandt, 2001 accepted as Iolanthe namibia (Brandt, 2001)
• Acanthaspidia natalensis (Kensley, 1977) accepted as Iolanthe natalensis (Kensley, 1977)
• Acanthaspidia neonotus (Menzies & George, 1972) accepted as Iolanthe neonotus Menzies & George, 1972
• Acanthaspidia pleuronotus (Menzies & Schultz, 1968) accepted as Iolanthe pleuronotus Menzies & Schultz, 1968
• Acanthaspidia porrecta Menzies & Schultz, 1968 accepted as Iolanthe porrecta (Menzies & Schultz, 1968)
• Acanthaspidia rostrata (Menzies & Schultz, 1968) accepted as Iolanthe rostrata (Menzies & Schultz, 1968)
• Acanthaspidia sulcatacornia Menzies & Schultz, 1968 accepted as Iolanthe sulcatacornia (Menzies & Schultz, 1968)
• Acanthaspidia typhlops (G. O. Sars, 1879) accepted as Iolanthe typhlops (G. O. Sars, 1879)
• Acanthaspidiidae Menzies, 1962
• Acanthastenasellus Chelazzi & Messana, 1985
• Acanthastenasellus forficuloides Chelazzi & Messana, 1985
• Acanthocope Beddard, 1885
• Acanthocope acutispina Beddard, 1885
• Acanthocope annulatus Menzies, 1962
• Acanthocope argentinae Menzies, 1962
• Acanthocope armata Chardy, 1972
• Acanthocope beddardi Malyutina, 1999
• Acanthocope carinata Chardy, 1972
• Acanthocope curticauda Birstein, 1970
• Acanthocope eleganta Malyutina & Brandt, 2004
• Acanthocope galaica Malyutina, Frutos & Brandt, 2018
• Acanthocope galatheae Wolff, 1962
• Acanthocope intermedia (Beddard, 1885) accepted as Storthyngura intermedia (Beddard, 1885)
• Acanthocope mendeleevi Malyutina, 1998
• Acanthocope muelleri Malyutina, 1999
• Acanthocope orbus Menzies & George, 1972
• Acanthocope pentacornis Müller, 1989
• Acanthocope puertoricana Malyutina, Frutos & Brandt, 2018
• Acanthocope spinicauda Beddard, 1885
• Acanthocope spinosissima Menzies, 1956
• Acanthocope unicornis Menzies, 1962
• Acanthocopinae Wolff, 1962
• Acanthomunna Beddard, 1886
• Acanthomunna agassizi George, 2004
• Acanthomunna beddardi Menzies, 1962
• Acanthomunna bettongia Cohen, 1998
• Acanthomunna hystrix (Hansen, 1916)
• Acanthomunna lagorchestes Cohen, 1998
• Acanthomunna macropus Cohen, 1998
• Acanthomunna potorous Cohen, 1998
• Acanthomunna proteus Beddard, 1886
• Acanthomunna spinipes (Vanhöffen, 1914)
• Acanthomunna tannerensis Schultz, 1966
• Acanthoniscus G. O. Sars, 1879 accepted as Acanthaspidia Stebbing, 1893 accepted as Iolanthe Beddard, 1886
• Acanthoniscus typhlops G. O. Sars, 1879 accepted as Acanthaspidia typhlops (G. O. Sars, 1879) accepted as Iolanthe typhlops (G. O. Sars, 1879)
• Acutomunna Winkler, 1994
• Acutomunna foliacea (Chardy, 1975)
• Acutomunna minuta Shimomura, 2009
• Adajinoperus Serov & Wilson, 1999
• Adajinoperus tetanomorphus Serov & Wilson, 1999
• Advenogonium Just & Wilson, 2007
• Advenogonium fuegiae (Doti & Roccatagliata, 2005)
• Allorostrata Winkler, 1994
• Allorostrata ovalis Winkler, 1994
• Allorostrata scutifrons Just & Wilson, 2004
• Amuletta Wilson & Thistle, 1985
• Amuletta abyssorum (Richardson, 1911)
• Aneckella Chappius & Delamare, 1957 accepted as Anneckella Chappius & Delamare, 1957
• Aneckella srilankae Sket, 1982 accepted as Anneckella srilankae Sket, 1982 represented as Anneckella srilankae srilankae Sket, 1982
• Aneckella srilankae rectecopulans Sket, 1982 accepted as Anneckella srilankae rectecopulans Sket, 1982
• Angeliera Chappuis & Delamare-Deboutteville, 1952
• Angeliera cosettae Coineau & Rao, 1972
• Angeliera dubitans Stock, 1977
• Angeliera gracilis (Gnanamuthu, 1954)
• Angeliera phreaticola Chappuis & Delamare-Deboutteville, 1952 represented as Angeliera phreaticola phreaticola Chappuis & Delamare-Deboutteville, 1952
• Angeliera phreaticola ischiensis Schulz, 1954