New records of Cosmarium Corda ex Ralfs (Desmidiaceae, Zygnematophyceae) in a tributary of the Itaipu Reservoir, Paraná, Brazil

Acta Botanica Brasilica

Stefania Biolo²  Norma Catarina Bueno¹  Natália Silveira Siqueira²  Carina Moresco² 

[1] ,Universidade Estadual de Maringá Programa de Pós-graduação em Ecologia de Ambientes Aquáticos Continentais Programa de Pós-graduação em Ecologia de Ambientes Aquáticos ContinentaisMaringá Paraná ,Brazil

关键词: algae;    desmids;    phytoplankton;    taxonomy;   

DOI  :  10.1590/S0102-33062013000100001

来源: SciELO

【 摘 要 】

This work is part of a survey of the desmid flora in a tributary of the Itaipu Reservoir, in the state of Paraná, Brazil. The objective was to expand the knowledge base regarding the genus Cosmarium (Desmidiaceae, Zygnematophyceae). We conducted a qualitative analysis of 60 samples of phytoplankton, which were collected from along the banks of the São Francisco Falso River between July of 2003 and June of 2004. We identified, drew, and described 18 taxa of Cosmarium. Of those 18 taxa, 8 represent new records for the state of Paraná: C. angulosum Bréb. var. angulosum, C. bireme Nordst. var. bireme, C. clepsydra Nordst. var. clepsydra, C. cf. galeritum Nordst. var. borgei, C. ginzbergeri, C. norimbergense Reinsch var. norimbergense, C. protractum (Nägeli) De Bary var. protractum, and C. rectangulare var. hexagonum (Elfving) G.S. West & West.

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