MANN, David G. 1989 (Mar. 28) The diatom genus Sellaphora: separation from Navicula Brit. Phycol. J. 24(1): 1-20, 58 figs., I table taxa: 7 [small cells separated on basis of protoplast characters, e.g. H-shaped plastid; LT designated for Sellaphora; includes tabular comparison of Navicula, Sellaphora, Trachyneis, and Gyrosigma]