Surirella bifrons var. tumida O.Müll. Surirella bifrons var. tumida O.Müll. in Bot. Jahrb. Syst. 34: 27, pl. 1, fig. 2. 1903is basionym for Iconella tumida (O.Müll.) Cocquyt & R.Jahn in PhytoKeys 82: 97. 2017