Cyclopyxis aplanata var. microstoma  Schönborn, 1966

Diagnosis: Shell circular with only slight arching, yellow-brown. Shell coarsely granulated with isolated mineral and organic xenosomes. Pseudostome relatively narrow, circular and centrally located, with invagination.

Dimensions: According to Schönborn (1966): Shell diameter 125—126 µm; height 41—41 µm; pseudostome diameter 26.4—26.5 µm.

Habitat: Freshwater.

Geographical distribution: Lake Latnjajaure, Sweden.