title: Typification and taxonomic status re-evaluation of 15 taxon names within the species complex Cymbellaaffinis/tumidula/turgidula (Cymbellaceae, Bacillariophyta).
abstract: Specimens belonging to the Cymbellaaffinis / Cymbellatumidula / Cymbellaturgidula species complex have many taxonomic problems, due to their high morphological variability and lack of type designations. Fifteen taxon names of this complex, distributed in five species, were re-evaluated concerning their taxonomic status, and lectotypified based on original material. In addition to light microscopy, some material was analyzed by electron microscopy. Four new combinations are proposed in order to reposition infraspecific taxa.
authors: Labfico, Departamento de Botânica, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil ; Programa de Pós-graduação em Biodiversidade Vegetal, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil.
authors: Weliton José
authors: WJ
authors: da Silva
authors: Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin, Berlin, Germany.
authors: Regine
authors: R
authors: Jahn
authors: Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico, Universidade Federal do Paraná, Curitiba, Brazil.
authors: Thelma Alvim Veiga
authors: TA
authors: Ludwig
authors: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany.
authors: Friedel
authors: F
authors: Hinz
authors: Labfico, Departamento de Botânica, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
authors: Mariângela
authors: M
authors: Menezes
keywords: Cymbellales; Cymbellarheophyla; Cymbellasubturgidula; Cymbellatropica; Cymbellauenoi; Diatoms; typification