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Difflugia umbilicata

 

D. umbilicata, a frontal view, b lateral view (245 µm); c two tests from the same location, each 179 µm

 

Difflugia umbilicata Penard, 1902

= Difflugia pyriformis var. umbilicata Penard, 1902

Diagnosis: Shell elongated ovoid; fundus usually crowned by a bud-shaped ornament; shell composed of quartz particles, sometimes mixed with fragments of diatom shells; pseudostome circular.

Dimensions: Penard: length 200-275 µm; my measurements 179-245 µm.

Ecology: I found this species occasionally in sediment of a ditch in the nature reserve Naardermeer, the Netherlands.

Remarks:

 

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