Dodatak:Popis vrpčara, K
- Kameginemertes
- Kameginemertes Iwata, 1998
- Katechonemertes Moore & Gibson, 1981
- Kirsteueria
- Kirsteueria Gibson, 1978
- Kirsteueriella
- Kirsteueriella Chernyshev, 2002
- Kohnia
- Kohnia Sundberg & Gibson, 1995
- Koinoporus Sánchez & Moretto, 1988
- Korotkevitschia
- Korotkevitschia
- Kosmocephala
- Kukumia Gibson & Sundberg, 2002