L. epistomium, stacked image – Mongolia, 2023
Lesquereusia epistomium Penard, 1902
Diagnosis: shell slightly compressed, colorless, ovoid or circular with a distinct long neck. Shell composed mainly of curved, siliceous rods and occasional mineral grains. Neck very sharply distinguished from the rounded shell and very abruptly turned to one side. Aperture roughly circular, surrounded by siliceous rods. Rods thick, short. Rods disposed as in L. spiralis, but reniform and stouter.
Dimensions: Length 90-160 µm.
Ecology: Sphagnum, peat bogs.
Geographical distribution: Europe, America, Africa, Mongolia (Lucow et al., 2025).
Remarks: This species is similar to L. spiralis but can be differentiated from it by the elongated neck and more circular body.
Lesquereusia epistomium, stacked image – Mongolia, 2023
Lesquereusia epistomium, detail of the shell wall, stacked image – Mongolia, 2023
L. epistomium – Mongolian fen, 2024
L. epistomium, Lagiëskamp, the Netherlands
L. epistomium, stacked image
L. epistomium, 126 µm; Lagiëskamp, the Netherlands
L. epistomium, with lobopodia; Lagiëskamp, the Netherlands
L. epistomium, with lobopodia; Lagiëskamp, the Netherlands
L. epistomium, 140 µm – Simamoor, Tirol, Austria