Yahia-Kéfi, O.D., Souissi, S., De Stefano, M. & Yahia, M.N.D. (2005). Bellerochea horologicalis and Lithodesmioides polymorpha var. tunisiense var. nov. (Coscinodiscophyceae, Bacillariophyta) in the Bay of Tunis: ultrastructural observations and spatio-temporal distribution. Botanica Marina, 48(1): 58-72