Protoheterotrichida
Protoheterotrichida is an order of karyorelict ciliates. It contains the family Geleiidae.
The term Protoheterotrichida derives from the three ancient Greek words , meaning "first, earliest, most prominent", , meaning "another, different", and, , meaning "hair", in reference to the potential evolutionary affinities of these ciliates with the heterotrichs.
