Parmulina cyathus Penard, 1902

Diagnosis: Shell in lateral view hemispherical, compressed laterally, in oral view ovoid; slit-like pseudostome when folded. Shell clear, flexible, chitinoid, opaque, attached debris. Pseudopods rare, bluntly lobate. Endoplasm granular. One vesicular nucleus.

Dimensions: Penard (1902): Diameter 40—45 µm, up to 60 µm. My measurements: 36 µm.

Ecology: Herbivorous. Found in dry mosses (on trees and roofs).