Fig. 3From: Geographical range expansion of Nitzschia volvendirostrata Ashworth, Dąbek & Witkowski, 2016 (Bacillariophyta: Bacillariaceae) based on morphological and molecular analysisNitzschia volvendirostrata. a Internal view of the valve shows details of areolae and striae, b–c Apical raphe endings strongly bent in the same direction. Scale line = 1 μmBack to article page