ABOVE: The ciliate Pseudoblepharisma tenue harbors both green algae and purple bacteria as symbionts. SEBASTIAN HESS M ore than a century ago, a German schoolteacher named Alfred Kahl made a career ...

The microbiology collection of extant protozoan protists comprises mainly microscope slides but ... groups (e.g. dinoflagellates), are held in the phycology collection of the algae, fungi and plants ...