Difflugia viscidula
 
D. viscidula 273-307 µm

 

 

Difflugia viscidula Penard, 1902

 

Diagnosis: shell elongated oblong, without a slight constriction between body and neck; neck, if distinct, short and composed of much smaller particles than the rest of the shell; neck sometimes with concave sides, like a vase. With zoochlorellae.

 

Dimensions: Penard (1902): 180-260 µm; my measurements length: 222-460 µm (mean 365 µm); width 118-200 µm; aperture 56-101 µm.

 

Ecology: fresh water; the Netherlands (Naardermeer and several other locations).

 

Remarks: a  caracteristic species.

 

Difflugia viscidula
Drawing: Penard (1902) in Faune Rhizopodique du Bassin du Léman
Difflugia viscidula
Difflugia viscidula, 292 µm - stacked image
Difflugia viscidula
Difflugia viscidula, 326 µm - 428 µm, Naardermeer, one sample; scale bar = 100 µm.
Difflugia viscidula
Difflugia viscidula, nucleus in squeezed cell. Notice the zoochlorellae and the ingested diatoms.
Difflugia viscidula
Difflugia viscidula, shell ratio Length / Width (n=39)