T. complanatum, after Penard, 1890
Trinema complanatum Penard, 1890
Diagnosis: shell broad elliptical, nearly rectangular with rounded corners; compressed, broad elliptical in transverse section. Shell composed of circular to broad elliptical platelets, hardly visible. Aperture normally broad elliptical, invaginated. Nucleus with a central nucleolus.
Dimensions: Shell length 39—49 µm (Penard, 1902); length 43—60 µm (Hoogenraad and De Groot, 1940)
Habitat: mosses, Sphagnum, aquatic vegetation, moistened soils.
Remarks: typical specimens are clear to distinguish from Trinema enchelys and Trinema lineare.
T. complanatum, lateral view, Reestdal, Netherlands, 2024
T. complanatum
T. complanatum
T. complanatum from Sumatra (L) and the Netherlands
T. complanatum, the Netherlands
T. complanatum – courtesy of © eye of science (www.eyeofscience.com)