Zygnemaphyceae associated with Utricularia foliosa L. in Iguacu National Park, Parana, Brazil

This study aimed to know the Zygnemaphyceae species associated to Utricularia foliosa L., in an aquatic ecosystem within the Iguacu National Park. Periphytic samples were collected monthly from the aquatic macrophyte U. foliosa between February 2010 and February 2011. A total of 63 taxa were identified, distributed among 14 genera. Cosmarium Corda ex Ralfs and Staurastrum Meyen were the genera most representative in number of species. Closterium lunula var. maximum Borge, C. nasutum Nordst., Cosmarium creperum West & West, Euastrum latipes Nordst. var. latipes f. evolutum Groenblad, Pleurotaenium sp., Staurastrum forficulatum var. minus (F.E. Fritsch & M.F. Rich) R.L. Groenblad & A.M. Scott, S. neglectum G.S. West, S. punctulatum Breb. var. punctulatum f. minor (West & West) and S. quadrangulare (Breb.) Ralfs var. sanctipaulense C. Bicudo, new citations for Parana, are described, illustrated and discussed.Original Abstract: O estudo objetivou conhecer as especies de Zygnemaphyceae associadas a Utricularia foliosa L., em um ecossistema aquatico localizado no Parque Nacional do Iguacu. Foram coletadas amostras perifiticas mensais da macrofita aquatica, entre fevereiro de 2010 e fevereiro de 2011. Um total de 63 taxons foi identificado, distribuidos em 14 generos. Cosmarium Corda ex Ralfs e Staurastrum Meyen foram os generos mais representativos em numero de especies. Closterium lunula var. maximum Borge, C. nasutum Nordst., Cosmarium creperum West & West, Euastrum latipes Nordst. var. latipes f. evolutum Groenblad, Pleurotaenium sp., Staurastrum forficulatum var. minus (F.E. Fritsch & M.F. Rich) R.L. Groenblad & A.M. Scott, S. neglectum G.S. West, S. punctulatum Breb. var. punctulatum f. minor (West & West) e S. quadrangulare (Breb.) Ralfs var. sanctipaulense C. Bicudo, citacoes novas para o Parana, encontram-se descritas, ilustradas e comentadas.