Figs 4, 5.

Maryna umbrellata, trophic specimens in the scanning electron microscope (4) and in a silver carbonate preparation (5). 4 – slightly oblique posterior view, showing the broadly conical body partited in calix and uvula by a deep furrow. The arrowhead marks the small mouth entrance at the boarder of calix and uvula; 5 – posterior polar view, showing the two oral ciliary fields (arrowhead) and the about 100 ciliary rows, which extend spirally, forming a suture on ventral side (arrow). The asterisks mark the boarder between calix and uvula. Scale bars: 50 μm.