Growing evidence suggests that sexual reproduction might be common in unicellular organisms, but observations are sparse. Limited knowledge of sexual reproduction constrains understanding of protist ecology. Although <i>Teleaulax amphioxeia</i> and <i>Plagioselmis prolonga</i> are common marine cryptophytes worldwide, and are also important plastid donors for some kleptoplastic ciliates and ...

The dinoflagellate family Warnowiaceae has often been considered to include some of the most complex cells among the protists. The number of described species is around 40, but both the species and generic concepts are in need of revision. Warnowiaceans are often fragile and readily change morphology under the light microscope, and they are usually regarded to be rare. They are particularly famous ...