List of Genera
- Ityphilus Cook, 1899
- Javaenia Chamberlin, 1944
- Juanobius Chamberlin, 1928
- Julus Linnaeus, 1758
- Kanparka Waldock and Edgecombe, 2012
- Kartops Archey, 1923
- Kataplexus Chamberlin, 1952
- Keporya Chamberlin, 1941
- Kesubius Chamberlin, 1925
- Ketampa Chamberlin, 1955
- Kethops Chamberlin, 1912
- Kiberbius Chamberlin, 1916
- Koepckeiella Kraus, 1954
- Koinethmus Chamberlin, 1958
- Korynia Chamberlin, 1941
- Kosswigibius Chamberlin, 1952
- Krateraspis Lignau, 1929
- Kuabius Chamberlin, 1920
- Kurdistanius Verhoeff, 1941
- Labrobius Chamberlin, 1915
- Lamnonyx Cook, 1896
- Lamotteophilus Demange, 1963
- Lamyctes Meinert, 1868
- Lamyctinus Silvestri, 1909
- Lamyctopristus Attems, 1928
