Distigma Ehrenberg
Distigma is a colorless euglenoid with two flagella. Unlike Astasia, it's likely that Distigma may never have had a photosynthetic anacestor since the cells lack both a stigma and the parabasal body photoreceptors that are involved in photosynthesis.
Like Euglena, Distigma cells swim with the undulating, shape-changing motions of metaboly.