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Mann, D. G.; McDonald, S. M.; Bayer, M. M.; Droop, S. J. M.; Chepurnov, V. A.; Loke, R. E.; Ciobanu, A.; Du Buf, J. M. H. (2004). The Sellaphora pupula species complex (Bacillariophyceae): morphometric analysis, ultrastructure and mating data provide evidence for five new species. Phycologia. 43(4): 459-482.