Rhogostoma epiphylla
R. epiphylla: A-B same cell in two different focus layers. Scale bars: 10 µm. Abbreviations: a=aperture; cv=contractile vacuole; g=granules; no=nucleolus; nu=nucleus.
 
 

Rhogostoma epiphylla Flues, Hermanns and Dumack, 2017

 

Diagnosis: Test roundish, length/width ratio about 1.2. Nucleus spherical, about 6.6 ± 1 µm, with one central spherical nucleolus. Aperture cleft-like. Easy to confuse with the slightly smaller (in mean test diameter) R. schuessleri, Belar 1921. Locomotion actively creeping, filopodia rarely extending to 30 µm. Prey mainly bacteria also algae and unicellular fungi. Cell division longitudinal, binary.

 

Dimensions: Test 19 µm (range 15-27 µm).

 

Ecology: Leaf surface of Arabidopsis sp.; Cologne, Germany

 

Reference:

Dumack, K., Flues. S., Hermanns, K. and Bonkowski, M., 2017. Rhogostomidae (Cercozoa) from soils, roots and plant leaves (Arabidopsisthaliana): Description of Rhogostoma epiphylla sp. nov. and R. cylindrica sp. nov.; Eur. J. Protistol. 60: 76–86.