Planocarina semimarginata (Van Oye, 1949) Kosakyan et al., 2025

Diagnosis: Shell compressed, elongated in broad view, approximately twice as long as wide. Keel starting close to the base of the neck, widest near the pseudostome, and gradually narrowing toward the fundus. It ends near the fundus (approximately at the lowest 1/16). Posterior end of the test rounded, without keel. Pseudostome oval, surrounded by a thick organic lip.

Dimensions: Shell length 176 μm; width 80 μm; L/B 2.2; shell thickness 30 μm; aperture 35 × 31 μm.

Ecology: Moist and dry mosses.

Geographical distribution: Indonesia.