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      Os gêneros Chaetomorpha Kütz. nom. cons. e Rhizoclonium Kütz. (Chlorophyta) do litoral do Estado da Bahia, Brasil Translated title: The genera Chaetomorpha Kütz. nom. cons. and Rhizoclonium Kütz. (Chlorophyta) from the littoral of Bahia State, Brazil

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          Abstract

          O presente trabalho refere-se ao estudo taxonômico dos gêneros Chaetomorpha e Rhizoclonium ocorrentes no litoral da Bahia. As espécies foram delimitadas com base no hábito, presença ou ausência de rizóides laterais, tipo de célula basal, forma e dimensões celulares. A presença de inclusões cristalinas nas células também foi verificada. Foram identificadas nove espécies, sete para o gênero Chaetomorpha (C. aerea (Dillwyn) Kütz., C. antennina (Bory) Kütz., C. brachygona Harv., C. clavata Kütz., C. crassa (C. Agardh) Kütz., C. minima Collins & Herv. e C. nodosa Kütz.) e duas para o gênero Rhizoclonium (R. africanum Kütz. and R. riparium (Roth) Kütz. ex Harv.). Chaetomorpha crassa, C. minima e C. nodosa são novas adições para o litoral nordeste do Brasil e C. aerea, C. clavata e R. africanum são adições para o litoral da Bahia. Três tipos de cristais foram encontrados: 1. cristais de sílica, em forma de finas agulhas agrupadas, presentes em C. aerea, C. antennina, C. brachygona, C. clavata e C. crassa; 2. cristais de oxalato de cálcio, em forma de octaedros, encontrados em C. antennina e C. clavata e, 3. cristais de carbonato de cálcio, em forma de cones formando agregados globosos, observados em C. clavata. Talos férteis de C. antennina, C. clavata, C. nodosa, R. africanum e R. riparium são ilustrados pela primeira vez para o Brasil. Descrições detalhadas das estruturas vegetativas e reprodutivas das espécies e comparações com táxons afins são apresentadas.

          Translated abstract

          This paper presents a taxonomic study of the genera Chaetomorpha and Rhizoclonium occurring in the littoral of Bahia. The species were defined based on habit, presence or absence of lateral rhizoids, basal cell type, shape and cells dimensions. The presence of crystalline inclusions in cells was also verified. It were identified nine species, seven to the genus Chaetomorpha (C. aerea (Dillwyn) Kütz., C. antennina (Bory) Kütz., C. brachygona Harv., C. clavata Kütz., C. crassa (C. Agardh) Kütz., C. minima Collins & Herv. and C. nodosa Kütz.) and two to the genus Rhizoclonium (R. africanum Kütz. and R. riparium (Roth) Kütz. ex Harv.). Chaetomorpha crassa, C. minima and C. nodosa are new additions to the Northeastern of Brazil and C. aerea, C. clavata and R. africanum are additions to the Bahia. Three crystals types were found: 1. clusters of fine needle-shaped of silica crystals presents in C. aerea, C. antennina, C. brachygona, C. clavata and C. crassa; 2. octahedral of calcium oxalate crystals found in C. antennina and C. clavata and, 3. globular aggregates of cone-shaped calcium carbonate crystals observed in C. clavata. Fertile thallus of C. antennina, C. clavata, C. nodosa, R. africanum and R. riparium are being illustrated for the first time for the Brazilian coast. The vegetative and reproductive structures are described in detail and a comparison with similar species is provided.

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          Most cited references76

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbb
                Brazilian Journal of Botany
                Braz. J. Bot.
                Sociedade Botânica de São Paulo (São Paulo )
                1806-9959
                September 2009
                : 32
                : 3
                : 545-570
                Affiliations
                [1 ] Universidade Estadual de Feira de Santana
                [2 ] Universidade Federal do Rio de Janeiro Brazil
                Article
                S0100-84042009000300014
                10.1590/S0100-84042009000300014
                7e8db1f5-5c33-4eb3-ab04-76c22aa4f242

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-8404&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Bahia,Chaetomorpha,Chlorophyta,crystalline inclusions,Rhizoclonium,inclusões cristalinas

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