| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Janthinisca postlutea | (Kiriakoff, 1959) | species | Accepted | ||
| Janthinisca rosita | Kiriakoff, 1968 | species | Accepted | ||
| Janthinisca signifera | (Holland, 1893) | species | Accepted | ||
| Janthinisca subcarnea | (Kiriakoff, 1968) | species | Accepted | ||
| Jerbeia darkovi | Gorbunov, 2018 | species | Accepted | ||
| Jordaniana lactea | (Pagenstecher, 1903) | species | Accepted | ||
| Jordanisca tenuisaria | (Staudinger, 1900) | species | Accepted | ||
| Josefrazowskia recondita | (Razowski, 2006) | species | Accepted | ||
| Josefrazowskia secundana | Aarvik, 2019 | species | Accepted | ||
| Juxtilema smithi | Volynkin, 2021 | species | Accepted | ||
| Kalenga ansorgei | (Warren, 1899) | species | Accepted | ||
| Kalenga culanota | Whalley, 1971 | species | Accepted | ||
| Kalenga discata | (Warren, 1905) | species | Synonym | ||
| Kalenga maculanota | Whalley, 1971 | species | Accepted | ||
| Kalenga namizimus | Heppner & Thiele, 2016 | species | Accepted | ||
| Kalenga pusillata | (Warren, 1902) | species | Synonym | ||
| Kariosa albulata | Mey, 2011 | species | Accepted | ||
| Kariosa autumnaria | Mey, 2011 | species | Accepted | ||
| Karschiola holoclera | (Karsch, 1894) | species | Accepted | ||
| Karschiola ndzou | László & Volynkin, 2023 | species | Accepted | ||
| Kayamuhakaia aarviki | Lehmann, 2025 | species | Accepted | ||
| Kayamuhakaia aberdarensis | Lehmann, 2025 | species | Accepted | ||
| Kayamuhakaia barrychappelli | Lehmann, 2025 | species | Accepted | ||
| Kayamuhakaia bokatolaensis | Lehmann, 2025 | species | Accepted | ||
| Kayamuhakaia finchhattoni | Lehmann, 2025 | species | Accepted |