Cyclopyxis plana var. microstoma Schönborn, 1966
Diagnosis: Test small, flat and yellow-brown in color, covered with single flat mineral grains. Pseudostome ventrally, circular and occupying at most 1/3 of the shell diameter.
Dimensions: Test height about 20 um, shell diameter about 45 μm.
Remarks: The form resembles strikingly the kind described by Bartos 1963 from Java, Cyclopyxis plana Bartos. It differs from it by the somewhat deeper intussusception of the pseudostome (5 µm) and by the much smaller pseudostome. However, as with the form described by Bartos, the invagination begins immediately on the shell edge. Bartos does not indicate any color.