Centropyxis reversa Bartos, 1963

Diagnosis: At first glance, this new species is reminiscent of C. platystoma in the shape and size of the shell opening, which is highly arched at the front and only slightly bent backwards at the back. The shells are usually pressed firmly against the base with their shell openings. The continuation of the shell opening rises more slowly or very steeply to the back and top, at the end the shell is shorter or longer to the front and tilted over the top of the shell. The shells are rounded or angular. The shells are made up of many flat mineral fragments, with particularly large building material used at the end of the shell. The edge of the shell opening is covered with a series of large, flat and square mineral fragments. The shell is clearly narrowed between the shell opening and the actual shell.

Dimensions: Length 84 µm, width 43 µm, aperture 34 µm. Viewed from above, the aperture is 34 µm, and the actual shell width 50 µm. The edge of the aperture is 5-6 µm wide.

Ecology: Mosses.

Geographical distribution: Java, Indonesia.