A New Species of Amanoa (Phyllanthaceae) from ParáState, Amazonian Brazil

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Amanoa marapiensis, a new species endemic to ParáState, Brazil, is described, illustrated, and discussed. It is morphologically similar to A. steyermarkii from Venezuela, but it differs in its more congested inflorescence, chartaceous leaves with entire margins, slightly revolute near the base, and the network of shiny, translucent "islands" and isolated punctations that are visible with a loupe, especially on the abaxial surface, as well as the scarcely evident secondary veins. The species was collected in an area of difficult access, by helicopter, as part of the RADAMBRASIL Project, at an altitude of 350 m. A revised key to the Neotropical species of Amanoa is presented. Amanoa marapiensis, uma nova espécie endêmica do Estado do Pará, é descrita, ilustrada e comentada. Ela mostra similaridade morfológica com A. steyermarkii Jablonski, da Venezuela, da qual se separa pelas inflorescências aglomeradas, congestas, folhas cartáceas, margem plana, discretamente revoluta apenas na região basal, com emaranhado de "ilhas" e pontuac¸ ões brilhosas isoladas, visíveis álupa, especialmente na face abaxial, e nervuras secundárias pouco evidentes á vista desarmada. A espécie foi coletada em área de difícil acesso, como parte do Projeto RADAMBRASIL, por meio de helicóptero, em altitude ca. 350 m. Uma chave revisada para as espécies neotropicais de Amanoa é apresentada.

Appeared or available online: February 5, 2014

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