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      Leucocoprinus Pat. (Agaricaceae, Basidiomycota) no Parque Estadual de Itapuã, Viamão, RS,Brasil Translated title: Leucocoprinus Pat. (Agaricaceae, Basidiomycota) species in Itapuã State Park, Viamão, Rio Grande do Sul State, Brazil

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          Abstract

          O presente trabalho descreve as espécies do gênero Leucocoprinus que ocorrem no Parque Estadual de Itapuã, município de Viamão, estado do Rio Grande do Sul, Brasil. Seis táxons foram encontrados: L. birnbaumii (Corda) Singer, L. brebissonii (Godey) Locq., L. cepistipes (Sowerby) Pat., L. cretaceus (Bull.) Locq., L. fragilissimus (Berk. & M.A. Curtis) Pat. e L. cf. medioflavus (Boud.) Bon. São apresentados chave para identificação, descrições e ilustrações detalhadas dos caracteres macro e microscópicos, e comentários sobre a taxonomia e ecologia das espécies estudadas.

          Translated abstract

          This work describes the species of Leucocoprinus found in Itapuã State Park, Viamão municipality, Rio Grande do Sul state, Brazil. Six species were found: L. birnbaumii (Corda) Singer, L. brebissonii (Godey) Locq., L. cepistipes (Sowerby) Pat., L. cretaceus (Bull.) Locq., L. fragilissimus (Berk. & M.A. Curtis) Pat. and L. cf. medioflavus (Boud.) Bon. An identification key, detailed descriptions and illustrations of macro and microstructures, and comments on the taxonomy and ecology of the species are presented.

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          Most cited references 42

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          The Agaricales in modern taxonomy

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            Fungus Flora of Venezuela and adjacent countries

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              Genera in the family Agaricaceae: evidence from nrITS and nrLSU sequences.

               Else Vellinga (2004)
              The circumscription of the family Agaricaceae, its genera and their characters are investigated. Analyses of the ITS and LSU sequence data, separately and in combination result in exclusions and reorganization. Notholepiota areolata, a secotioid species from New Zealand, Cystoagaricus with brown, irregular-knobby spores, and Leucopholiota with gelatinized hymenophoral trama and amyloid spores, fall outside the family Agaricaceae. In the reorganization, long accepted tribe and genus definitions are amended, viz.: (1) Macrolepiota and Chlorophyllum separately are monophyletic, but not together; (2) Leucoagaricus and Leucocoprinus together form one large monophyletic clade, that also includes polyphyletic Sericeomyces; (3) Lepiota, Cystolepiota and Melanophyllum together form a monophyletic clade; (4) Secotiation has happened within several clades (e.g. Agaricus and Chlorophyllum), though not in the Leucoagaricus/Leucocoprinus clade, nor in the lineage of Macrolepiota proper; gasteroid and most secotioid species in the course of adaptation acquire coloured spores; and (5) the monovelangiocarpic Chamaemyces fracidus appears to be basal to the family and provides clues to the morphology of the ancestral Agaricaceae. Trama and developmental characters characterize the different clades, whereas spore characters play a minor role.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                abb
                Acta Botanica Brasilica
                Acta Bot. Bras.
                Sociedade Botânica do Brasil (Belo Horizonte )
                1677-941X
                September 2009
                : 23
                : 3
                : 720-728
                Affiliations
                [1 ] Universidade Federal do Rio Grande do Sul Brazil
                Article
                S0102-33062009000300011
                10.1590/S0102-33062009000300011
                Product
                Product Information: website
                Categories
                PLANT SCIENCES

                Plant science & Botany

                Agaricales, mushrooms, taxonomy, cogumelos, taxonomia

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