Difflugia globulosa (Dujardin, 1837) Penard, 1902 – Small species
Diagnosis: Shell light to dark brown, spherical, composed of small and large quartz particles but may also include diatom frustules, fungal spores and hyphen and other debris; general appearance rough; aperture broad and circular, surrounded by smaller particles which form a more or less thickened collar. Pseudopodia lobose. Nucleus not observed.
Dimensions: Diameter of the shell 61-70 µm (n=10); height 66-72 µm; aperture 32 µm, half the diameter of the shell.
Ecology: Peatbog, between wet sphagnum; Naardermeer, the Netherlands, 2019.
Remarks: This species resembles one of the forms described by Penard (1902) who described D. globulosa as having two distinct forms, the typical form and one varying between 135 and 155 µm and two smaller forms 50 to 70 µm in size.