A = Lugol fixed cells (DIC); B = Schematic drawings of cells in Lugol (arrowhead=nucleus); C = Cell with two long flagella; D = Cell with foodvacuoles. C&D=Glutaraldehyde fixed cells stained with primulin and observed with UV-excitation in epifluorescence microscope
Size: length 5-20 µm
Note: Found in January to April in coastal waters. A maximum (170 000 cells L-1) was found in January at the mouth of Gullmarsfjorden
Distinctive features: Cells with a prominent anterior nucleus and surounded by debris outside the theca
Distribution: Baltic, Kattegat, Skagerrak
Ikävalko, J. & Thomsen, H. A. 1997. The Baltic Sea ice biota (March 1994): A study of the protistan community. Europ. J. Protistol. 33: 229-243.
Thomsen, H. A., Buck, K. R., Bolt, P. A & Garrison, D. L. 1991. Fine structure and biology of Cryothecomonas gen. nov. (Protista incertae sedis) from the ice biota. Can J. Zool. 69: 1048-1070.