Kamaleda, Genus – synonym of Nuculana, Genus
Karnekampia, Genus – synonym of Chlamys, Genus
Kellea, Genus – synonym of Kellia, Genus
Kellya, Genus – synonym of Kellia, Genus
Kellyia, Genus – synonym of Kellia, Genus
Kennerlia, Genus – synonym of Pandora, Genus
Kochia, Genus – synonym of Ovatella, Genus
Korenia, Genus – synonym of Gibbula, Genus
Kurodamya, Genus – synonym of Cardiomya, Genus