Licófitas e monilófitas (pteridófitas) da ilha de mosqueiro, município de Belém, Estado do Pará, Brasil.

Abstract

This work presents a floristic survey and taxonomic treatment of the pteridophytes (lycophytes and monilophytes) of Island of Mosqueiro, municipality of Belém, State of Pará. This island comprises an area of 22.000 ha with rich in habitats, as well as large natural forest remains, making possible the occurrence of large species diversity of pteridophytes. For accomplishing the inventory, sampling was carried out in different environments, inside and on the margins of the forests, as well as open habitats and disturbed sites in urban zone, from March to October 2005, and in November 2006. The usual methods and specialized literature were utilized for the analysis and identification of the collected specimens. Identification keys and descriptions of the families, genera and species are provided as well as photographs, geographic distribution, comments on the species and a glossary containing specific terms from pteridology used in the present work. In the study area, 19 families, 34 genera and 70 species (five lycophytes and 65 monilophytes) were recorded. The families with the largest number of species were Hymenophyllaceae with 12 species, fallowed by Lomariopsidaceae, with eight species and Dryopteridaceae, Polypodiaceae, Pteridaceae and Vittariaceae, with six species each. The most representative genus were Trichomanes L. (Hymenophyllaceae), with ten species, Elaphoglossum Schott. ex J. Sm. (Lomariopsidaceae) with six species and Adiantum L. (Pteridaceae) with four species. Of the 70 species recorded for the area, eight are new references for the State of Pará {Salpichlaena hookeriana (Kuntze) Alston, Triplophyllnm angustifolium Holttum, Trichomanes Irollii Bergdolt, Elaphoglossum ohovatum Mickel, E. styriacum Mickel and Hecistopteris kaieteurensis Kelloff & G.S. McKee), and one, for the North Region of Brazil (Ihelypleris macrophylla (Kunze) C.V. Morton). The island of Mosqueiro presents a greater number of species, as compared to other arcas of Belém metropolitan area.