Epidermis cells with 1 (-2) chloroplasts, without pyrenoids
. On bark, growing over bryophytes.
Symmetrical valves with apices protracted; striae punctate, central area have stigma; raphe straight; plastid single, two lobed and central pyrenoids
luteus has fewer chloroplasts (5-13), which are absent from the ventral region of the cell, and lack mucocysts and thylakoid lamellae in the matrix of the pyrenoid
(Hara and Chihara, 1987; Hallegraeff and Hara, 1995), H.
Single laminar, parietal chloroplast, with 1-3 pyrenoids
. Epiphyte on Bryothamnion triquetrum (S.
were observed in the specimen separately from the chloroplast due to the limitations of light microscopy.