A&B = A living cell with pseudonodule (A, arrow) and the exterior of labiate processes (B, arrowheads); C&D = Cleaned valve. A&B (DIC), C (BF) and D (PC).
Life-form: Solitary
Size: Diameter = 18 - 97 µm
Resting spore:
Note: Lee & Lee (1990) reported two distinct forms of this species
Distinctive features: Warmwaterform: Marginal ring of prominent exterior of labiate processes. Pseudonodule distinct. Areolation.
Similar species:
Distribution: Widely
Literature:
Drebes, G. 1974. Marines Phytoplankton, Eine Auswahl der
Helgoländer Planktonalgen (Diatomeen, Peridineen). Georg Thieme
Verlag, Stuttgart. 186 pp.
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.
Hendey, N. I. 1964. An introductory account of the smaller algae of British coastal waters. Part 5: Bacillariophyceae (Diatoms). HSMO, London. 317 pp.
Lee, J. H. & Lee, J. Y. 1990. A light and electron microscopy study on the marine diatom Roperia tesselata (Roper) Grunow. Diatom Research. 5: 325-335.