Urostylida
Urostylida is an order of littoral ciliates. The taxonomy of the order is largely unresolved and still subject to scientific inquiry.
Families
According to the Catalogue of Life, nine families are accepted within Holosticha.- Bakuellidae
- Holostichidae
- Kahliellidae
- Pseudokeronopsidae
- Pseudourostylidae
- Psilotrichidae
- Rigidothrichidae
- Trachelostylidae
- Urostylidae