Pompholyxophrys stammeri
Pompholyxophrys stammeri (Rainer, 1968) Roijackers & Siemensma, 1988
Diagnosis: Cell spherical, coated with one or two layers of elliptical, strongly compressed siliceous perles. Filopodia fine and short, emerging through the layer of perles. Cytoplasm usually reddish. Fast rolling movement.
Dimensions: Cell with periplast 27-66 µm; perles 2-6 µm.
Habitat: Fresh water; recorded from Europe and South-America. I have found this species at several locations in the Netherlands, usually in clear water, and in Southern Sweden.
Remarks: I doubt if this species can be distinguished light microscopically from P. stellata.
References: Siemensma (1991), Roijackers and Siemensma, 1988.
Above: perle in dorsal and lateral view; below: dried perle with collapsed wall – after Siemensma, 1991
Pompholyxophrys stammeri, arrows point to flat scales.
Pompholyxophrys stammeri, arrow points to a discoid plate scale.
Cell 27 µm
