Valves (arrow=ocellulus, arrowheads=poroids) (SEM)
Size: Apical axis 1.2-13 µm, transapical axis 0.7-1.5 µm, pervalvar axis 1.5-3 µm
Distinctive features: Often with two pili on the concave valve, convex valve with a central tubular process, with ocelluli. In living cells the pili are not crossed. Best studied in TEM
Similar species: A. mammifer
Distribution: Arctic and temperate waters of the northern hemisphere, New Zealand
Hasle, G. R. & Syvertsen, E. E. 1996. Marine diatoms. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 5-385.
Hasle, G., von Stosch, H.A. & Syvertsen. E. 1983. Cymatosiraceae, a new diatom family. Bacillaria., 6: 9-156.