Trinema staryi  Balik, 1995

Diagnosis: Shell large, in ventral and lateral view drop-shaped, dorso-ventrally strongly depressed. Shell from hyaline, colourless organic matter. On the surface of the shell there are large isolated round scales, the spaces among them are filled with small round scales. Shell translucent, pellucid, colorless. Aperture rounded, large, in the narrow and low part of the shell. The periphery of the aperture are bordered with small dents.
Protoplasm translucent, pellucid, colorless. One nucleus, 1-5 vacuoles. Pseudopodia thin, thread-like, in different lengths, non-anastomose. Epipodia thin, thread-like.

Dimensions: Balik (1995): Shell length 196—248 µm; width 148—212 µm; depth 48—64 µm; diameter of aperture 64—79 µm; diameter of large scales 16—20 µm; diameter of small scales 2—4 µm.

Ecology and distribution. Vietnam, Tam-Dao, primary mountain rain forest, humic soil horizon, mixture of the disintegrated leaf titter and mineral particles.