Leuconidae Sars, 1878
Leucon acclivis (Bishop, 1981)
Leucon acutirostris G.O. Sars, 1865
Leucon adelae Petrescu, 1991
Leucon afeni Shalla & Bishop, 2004
Leucon affinis Fage, 1951
Leucon americanus Zimmer, 1943
Leucon (Leucon) andeep Mühlenhardt-Siegel, 2011
Leucon antarcticus Zimmer, 1907
Leucon armatus Given, 1961
Leucon assimilis Sars, 1886
Leucon bacescui Petrescu, 1994
Leucon bengalensis Lomakina, 1967
Leucon bishopi Bacescu, 1988
Leucon breidensis Gamo, 1987
Leucon brigittehilbigae Muhlenhardt-Siegel, 2005
Leucon (Macrauloleucon) complexus Mühlenhardt-Siegel, 2011
Leucon costatus Corbera, 2000
Leucon craterus Bishop, 1981
Leucon dayae Ledoyer, 1988
Leucon declivis Watling & McCann, 1996
Leucon dentirostris Muhlenhardt-Siegel, 2005
Leucon duodentatus Muhlenhardt-Siegel, 2005
Leucon ensis Bishop, 1981
Leucon falcicosta Watling & McCann, 1996
Leucon fulvus Sars, 1865
Leucon galatheae (Jones, 1956)
Leucon (Crymoleucon) grandidentatus Mühlenhardt-Siegel, 2011
Leucon hanseni Shalla & Bishop, 2004
Leucon heterostylis Calman, 1907
Leucon hirsuta
Leucon holti Shalla & Bishop, 2004
Leucon homorhynchus Bishop, 1981
Leucon inexcavatus Ledoyer, 1977
Leucon intermedius Mühlenhardt-Siegel, 1996
Leucon jonesi Bishop, 1981
Leucon kalluropus Stebbing, 1912
Leucon kerguelensis Zimmer, 1908
Leucon kobjacovae
Leucon kobjakovae Lomakina, 1955
Leucon laticauda
Leucon laticaudus Lomakina, 1952
Leucon latispina Jones, 1963
Leucon (Crymoleucon) longirhinus Mühlenhardt-Siegel, 2011
Leucon longirhynchus Muhlenhardt-Siegel, 2005
Leucon longirostris Sars, 1871
Leucon macrorhinus Fage, 1951
Leucon magnadentatus Given, 1961
Leucon mediterraneus Sars, 1878
Leucon medius Bishop, 1981
Leucon meredithi Petrescu, 1991
Leucon michaeli Petrescu, 1993
Leucon minor Lomakina, 1955
Leucon nasica (Krøyer, 1841)
Leucon nasicoides (Krøyer, 1841)
Leucon natharsti
Leucon nathorsti Ohlin, 1901
Leucon norrevangi Watling & Gerken, 1999
Leucon nudirhinus Muhlenhardt-Siegel, 2005
Leucon ocularis Hale, 1945
Leucon pacifica (Jones, 1969)
Leucon pallidus G.O. Sars, 1865
Leucon paludus
Leucon panamensis Jones, 1969
Leucon (Crymoleucon) parantarcticus Mühlenhardt-Siegel, 2011
Leucon parasiphonatus Mühlenhardt-Siegel, 1994
Leucon polarsterni Ledoyer, 1993
Leucon profundus Hansen, 1920
Leucon pusillus (Bishop, 1981)
Leucon quadriplicata
Leucon (Leucon) quattuormulierum Mühlenhardt-Siegel, 2011
Leucon robustus Hansen, 1920
Leucon sagitta Zimmer, 1907
Leucon sarsi Shalla & Bishop, 2004
Leucon savulescui Petrescu, 1992
Leucon septemdentatus Zimmer, 1902
Leucon serratus Norman, 1879
Leucon serrulirostris Ledoyer, 1988
Leucon simanensis Gamo, 1962
Leucon siphonatus Calman, 1905
Leucon socius (Bishop, 1981)
Leucon spiniventris Hansen, 1920
Leucon spinulosus Hansen, 1920
Leucon stenorhynchus Gamo, 1988
Leucon subnasica Given, 1961
Leucon tener Hansen, 1920
Leucon tenuirostris Sars, 1887
Leucon turgidulus Bishop, 1981
Leucon vanhoeffeni Zimmer, 1907
Leucon varians Gamo, 1962
Leucon vasilei Petrescu, 1994
Leucon (Crymoleucon) weddellensis Mühlenhardt-Siegel, 2011
Leucon weddelli Ledoyer, 1993
Leucon (Macrauloleucon) weigmanni Mühlenhardt-Siegel, 2011