Difflugia perfilievi Gassowsky, 1936

Diagnosis: Shell correctly ovoid, its maximum width is in the middle of the long axis, from where the sides gradually converge to the aboral side and the pseudostome. Shell covered with a mixture of medium and large sized mineral grains. Pseudostome round.

Dimensions: Gassowsky (1936): Shell length 72-121 µm; width 33-81 µm; diameter pseudostome 15-50 µm.

Ecology: Freshwater.