| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Klugeana swartlandensis | Geertsema, 1990 | species | Accepted | ||
| Koboldocossus nigrostriatus | Yakovlev, 2011 | species | Accepted | ||
| Koffoleania michaellae | Laporte, 1977 | species | Accepted | ||
| Kroonia adamauensis | Lehmann, 2010 | species | Accepted | ||
| Kroonia carteri | Lehmann, 2010 | species | Accepted | ||
| Kroonia dallastai | Lehmann, 2010 | species | Accepted | ||
| Kroonia fumealis | (Janse, 1925) | species | Accepted | ||
| Kroonia heikeae | Lehmann, 2010 | species | Accepted | ||
| Kroonia honeyi | Lehmann, 2010 | species | Accepted | ||
| Kroonia murphyi | Lehmann, 2010 | species | Accepted | ||
| Kroonia natalica | (Hampson, 1910) | species | Accepted | ||
| Kroonia politzari | Lehmann, 2010 | species | Accepted | ||
| Kruegerellus singularis | Mey & Sobczyk, 2019 | species | Accepted | ||
| Kruegerilema smithi | Volynkin & László, 2021 | species | Accepted | ||
| Kuchleria menadiara | (Thierry-Mieg, 1893) | species | Accepted | ||
| Kuehneana antennata | Hacker & Saldaitis, 2011 | species | Accepted | ||
| Kuehneana dubiosa | (Kühne, 2010) | species | Synonym | ||
| Kuehneana turneri | (Tams, 1930) | species | Accepted | ||
| Kuja carcassoni | Whalley, 1971 | species | Accepted | ||
| Kuja catenula | (Pagenstecher, 1892) | species | Accepted | ||
| Kuja effrenata | Whalley, 1971 | species | Accepted | ||
| Kuja fractifascia | (Warren, 1908) | species | Accepted | ||
| Kuja gemmata | (Hampson, 1906) | species | Accepted | ||
| Kuja hamatipex | (Hampson, 1916) | species | Accepted | ||
| Kuja kibala | Whalley, 1971 | species | Accepted |