van der Wiel (1982): (A possibly heterogenous group of) fungal spores (chlamydospores?), biseptate, shortly ellipsoidal. Hyaline basal cell generally lacking, the two darkly pigmented cells are usually found detached in the pollen samples. Detached cells 8-14 (10) × 7-11 (9) pm In each septum a ca 1 µm wide pore. Apical cell also provided with a ca 1 µm wide pore.
Halbwachs et al 2021: Cylindrical, black spore with rounded ends; 8x14.5 µm
van der Wiel AM (1982) A palaecological study of a section from the foot of the Hazendonk (Zuid-Holland), based on the analysis of pollen, spores and macroscopic remains. Rev. Palaeobot. Palynol. 38:35-90.