Typification and taxonomic status re-evaluation of 15 taxon names within the species complex Cymbella affinis / tumidula / turgidula (Cymbellaceae, Bacillariophyta) Author Silva, Weliton Jose da Labfico, Departamento de Botanica, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil & Programa de Pos-graduacao em Biodiversidade Vegetal, Instituto de Ciencias Biologicas, Universidade Federal de Goias, Goiania, Brazil welitondasilva@yahoo.com.br Author Jahn, Regine Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universitaet Berlin, Berlin, Germany Author Ludwig, Thelma Alvim Veiga Departamento de Botanica, Setor de Ciencias Biologicas, Centro Politecnico, Universidade Federal do Parana, Curitiba, Brazil Author Hinz, Friedel Alfred-Wegener-Institut, Helmholtz-Zentrum fuer Polar- und Meeresforschung, Bremerhaven, Germany Author Menezes, Mariangela Labfico, Departamento de Botanica, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil text PhytoKeys 2015 2015-07-21 53 1 25 http://dx.doi.org/10.3897/phytokeys.53.4782 journal article http://dx.doi.org/10.3897/phytokeys.53.4782 1314-2003-53-1 FFDFFFE0FFC6FFE9C931FFEFFF8CFF9F 576274 Cymbella tumidula var. procera (Krammer) W.Silva comb. nov. Figs 57-63 Basionym . Cymbella affinis var. procera Krammer, Diatoms Europe 3: 161, Figs 22: 8-13, 2002. Holotype. Preparation 714 IOK, in the Alfred-Wegener-Institut fuer Polar- und Meeresforschung (BRM), Bremerhaven, Germany. Lectotype (designated here). An individual on preparation 714 IOK, in the Alfred-Wegener-Institut fuer Polar- und Meeresforschung (BRM), Bremerhaven, Germany, represented by Fig. 57 . Type locality. Serbia, Rogatica (abundant in chalk-rich spring), 1976. Valves lanceolate, dorsiventral, dorsal and ventral margins convex; ends subrostrate or subcapitate; length 27.0-40.3 µm , breadth 9.0-10.2 µm , L/B ratio 2.9-4.2; axial area linear-lanceolate, slightly arched, central area rounded; striae 9-13 in 10 µm , becoming 13-18 toward ends, 2-5 isolated pores; 25-31 punctae in 10 µm . Remarks . According to Krammer (2002) , this variety differs concerning wider valves (higher than 9.5 µm ) from the nominate variety of Cymbella affinis sensu Krammer. We recorded specimens of Cymbella tumidula var. procera with 9 µm breadth, which were higher than the nominate variety (9.0-10.2 vs. 7.8-8.7 µm ). Specimen designated by Krammer (2002) , i.e., the preparation 714 IOK (BRM), were found to belong to more than one taxon. Therefore we designated a lectotype as established in Art. 9.11 of the ICN ( McNeill et al. 2012 ).