Dodatak:Abecedni popis diapsida: K
Ka
uredi- Kadaliosaurus †
- Kadaliosaurus,
- Kadimakara Bartholomai, 1979 †
- Kaiwhekea Cruickshank & Fordyce, 2002 †
- Kalisuchus,
- Kaprosuchus Sereno & Larsson, 2009 †
- Karamuru Kischlat, 2000 †
Ke
uredi- Keichousaurus Young, 1958 †
- Keichousaurus,
- Kentisuchus †
- Kepodactylus Harris & Carpenter, 1996 †
Kh
uredi- Khurendukhosaurus,
Ki
uredi- Kimmerosaurus Brown, 1981 †
Ko
uredi- Koilamasuchus,
Kr
uredi- Kronosaurus Longman, 1924 †
† Krzyzanowskisaurus Heckert 2005
uredi- †Krzyzanowskisaurus hunti (Heckert, 2002)
Ku
uredi- Kudnu,
- Kuehneosauridae,
- Kuehneosaurus,
- Kuehneosuchus,
- Kunpengopterus
Kw
uredi- Kwangsisaurus Young, 1959 †
- Kwangsisaurus,
Ky
uredi- Kyrgyzsaurus,