Ciliophora (Ciliates)
Class: Oligohymenophorea
Order: Peniculida
Family: Parameciidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Paramecium duboscqui | Chatton & Brachon, 1933 | - | (rediscovered) | China & France | Rediscovered | Access |
Order: Pleuronematida
Family: Hemispeiridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Protospirella mazurica | (Raabe, 1968) Aescht, 2001 | - | (rediscovered) | Danube River, Europe | Rediscovered | Access |