Ka
, Kaistella , Kaistia , Kangiella
Ke
Kerstersia Coenye et al., 2003
- Kerstersia gyiorum Coenye et al., 2003
Bacteria → Proteobacteria → Betaproteobacteria → Burkholderiales → Alcaligenaceae , Ketogulonicigenium
Ki
, Kibdelosporangium , Kineococcus , Kineosphaera , Kineosporia , Kineosporiaceae , Kingella , Kitasatospora
Kl
, Klebsiella , Kluyvera
Kn
, Knoellia
Ko
, Kocuria , Kofleria , Kofleriaceae , Kordia , Kordiimonadaceae , Kordiimonadales , Kordiimonas , Koserella , Kozakia
Kr
Kribbella Park et al., 1999 emend. Sohn et al., 2003
- Kribbella alba Li et al., 2006
- Kribbella aluminosa Carlsohn et al., 2007
- Kribbella amoyensis Xu et al., 2012
- Kribbella antibiotica Li et al., 2004
- Kribbella catacumbae Urzì et al., 2008
- Kribbella flavida Park et al., 1999
- Kribbella ginsengisoli Cui et al., 2010
- Kribbella hippodromi Everest and Meyers, 2008
- Kribbella jejuensis Song et al., 2004
- Kribbella karoonensis Kirby et al., 2006
- Kribbella koreensis (Lee et al., 2000) Sohn et al., 2003
- Kribbella lupini Trujillo et al., 2006
- Kribbella sancticallisti Urzì et al., 2008
- Kribbella sandramycini Park et al., 1999
- Kribbella solani Song et al., 2004
- Kribbella swartbergensis Kirby et al., 2006
- Kribbella yunnanensis Li et al., 2006
Bacteria → Actinobacteria → Actinomycetales → Nocardioidaceae , Krokinobacter
Ku
, Kurthia , Kutzneria
Ky
Kyrtuthrix Ercegović, 1929
- Kyrtuthrix dalmatica Ercegović 1929
- Kyrtuthrix maculans (Gomont) Umezaki 1958
Bacteria → Cyanobacteria → Nostocales → Scytonemataceae
Kytococcus Stackebrandt et al., 1995
- Kytococcus aerolatus Kämpfer et al., 2009
- Kytococcus schroeteri Becker et al. 2002
- Kytococcus sedentarius (ZoBell and Upham 1944) Stackebrandt et al. 1995
Bacteria → Actinobacteria → Actinomycetales → Dermacoccaceae