Dodatak:Popis praživotinja, J
Ja
uredi- Jakoba D.J.Patterson, 1990
- Jakobea
- Jakobida
- Jakobidae
- Janickia
- Janickiella Duboscq & Grassé
- Janickina Chatton
Je
uredi- Jeppsia calani (Jepps, 1937) Corliss, 1960
Protozoa → Ciliophora → Kinetofragminophora → Apostomatida → Foettingeriidae
Jo
uredi- Jodomonas Penso, 1932
- Joenia Grassi
- Joenina Grassi
- Joenopsis Cutler
- Jolya Skvortzov & Noda