Surirella tenera var. nervosa A.W.F.Schmidt Surirella tenera var. nervosa A.W.F.Schmidt, Atlas Diatom.-Kunde, pl. 23, fig. 15. 1875is basionym for Iconella nervosa (A.W.F.Schmidt) Cocquyt & R.Jahn in PhytoKeys 82: 93. 2017