Valkanovia delicatula (Valkanov, 1962) Tappan, 1966

Diagnosis: Shell ovoid, oblate, and elliptical in cross‑section, composed of elongated elliptical hyaline scales arranged in a brick‑like pattern. The edges of the platelets are regularly rounded and do not interlock. The pseudostome is circular, with a diameter of 5.5 µm, and bordered by a slightly thickened rim formed from the chitinoid ground substance of the shell. Overall, the shell is extremely delicate and thin‑walled.

Dimensions: Length 42 µm; width 24 µm. Scales 4–5 µm in length.

Ecology: Found in soil between moist oak leaves.

Distribution: Bulgaria.