frontonia sp. unicellular ciliate protists under the microscope.

algae amoebas animal animals aquarium bacterivore bacterivores biology cell ciliate ciliates circumstances cytoplasm diatoms education elongate eukaryotes fauna filamentous free freeliving freshwater frontonia frontoniidae genus lab laboratory life light living macro marine members membranelles microscope microscopen microtubular morphology multicellular new ovoid paramecium pear peniculida phylogeny pigmented pond prey protists research science scientific shaped small species taxonomy testate trichocysts ultrastructure underwater unicellular zooplankton