Vannella platypodia (Gläser, 1912)

 

Diagnosis: Locomotive form of large minority, sometimes majority, somewhat longer than broader, sometimes spatulate, prolonged posteriorly; greatest dimensions 10-30 µm (mean 16-21µm); nucleus 5.0 µm; settles from floating form in a few minutes; attaches well to glass; simple filaments amongst glycostyles.

 

Ecology: common in fresh water.

 

Remarks: There are probably more species than we can distinguish lightmicroscopically.

 

Vannella platypodia
Vannella platypodia
Vannella platypodia
Vannella platypodia, c. 9.3 µm
Vannella platypodia
Vannella platypodia
Vannella platypodia
Vannella platypodia, c. 9.3 µm