Siver, P.A., Morales, E.A. Van de Vijver, B. Smits, M. Hamilton, P.B., Lange-Bertalot, H. and Hains, J.J. (2006) Observations on Fragilaria longifusiformis comb. nov. et nom. nov. (Bacillariophyceae), a widespread planktic diatom documented from North America and Europe. Phycological Research 54(3): 183-192.