Light microscopy identification notes

Valve View: Centric with a hyaline area in the centre of the cell. Irregular fasciculation. Between rows of areolae, visible hyalines are present, becoming more distinct towards the edge of the valve. Areolae have cribra which may be visible with a light microscope. 2 rings of labiate processes on valve mantle. Lower ring of processes should be visible at the lower valve margin.

Girdle View: Often as high as wide

Diameter (μm)	Pervalvar axis (height) (μm)	Areolae per 10 μm
230 - 500	120 - 500	5 - 6

References

Hasle, G.R., and Syvertsen, E.E. (1997) Identifying Marine Phytoplankton. pp. 106. Edited by C.R. Tomas. San Diego: Academic Press.

Hoppenrath, M., Elbrächter, M., Drebes, G. (2009) Marine Phytoplankton. pp. 32. Edited by Prof. Dr. Dr. h.c. Volker Mosbrugger. Stuttgart: E. Schweizerbart’sche Verlagsbuchhandlung (Nägele u. Obermiller)

Kraberg, A., Baumann, M and Dürselen, C-D,. (2010) Coastal Phytoplankton Photo Guide for Northern European Seas. pp. 50. München: Verlag Dr. Friedrich Pfeil.