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Branch formation in Pulvinularia suecica (Nostocales, Cyanoprokaryota) and considerations on the classification of dichotomously and pseudodichotomously branched genera

Texto completo
Autor(es):
Branco, Luis Henrique Z. [1] ; Hoffmann, Lucien [2] ; Necchi, Jr., Orlando [1] ; Taboga, Sebastiao Roberto [3] ; Moura, Emerson N. M. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] UNESP, Sao Paulo State Univ, IBILCE, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[2] Ctr Rech Publ, Environm & Biotechnol Res Unit CREBS, L-4422 Belvaux, Grand Duchy - Luxembourg
[3] UNESP, Dept Biol, IBILCE, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: NOVA HEDWIGIA; v. 90, n. 1-2, p. 95-104, FEB 2010.
Citações Web of Science: 2
Resumo

During a study oil stream macroalgae from highland areas of southeastern Brazil ({''}Serra do Cipo{''}, Minas Gerais State), populations of Pulvinulario suecica were found. Study of the specimens provided a detailed description of the pseudodichotomous branch formation, in which the bifurcation is originated by one cell that remains at the basis of the branch and does not integrate any of the branch ``arms{''}. The taxonomical position of Pulvinularia has been debated since the genus was firstly described. During the course of identification and branch formation studies, it became clear that organisms with dichotomous or pseudodichotomous branching type should be placed under the same family. Thus, it is proposed to adopt Capsosiraceae (sensu Bourrely) to group the genera Capsosira, Colteronema, Desmosiphon, Geitleria, Hyphomorpha, Letestuinema, Loriella, Pulvinularia and Stauromatonema. Additional taxonomical and ecological information on the populations are presented. (AU)

Processo FAPESP: 04/12494-9 - Cianoprocariotos subaerofiticos da região de Mata Atlântica do Estado de São Paulo, Brasil
Beneficiário:Luis Henrique Zanini Branco
Linha de fomento: Bolsas no Exterior - Pesquisa
Processo FAPESP: 02/04141-3 - Levantamento florístico e distribuição ecológica de comunidades de macroalgas lóticas de campos de altitude do Sudeste do Brasil
Beneficiário:Orlando Necchi Junior
Linha de fomento: Auxílio à Pesquisa - Regular