Resumo

PIETROBOM, Marcio Roberto et al. The lycophytes of the Caxiuanã National Forest, Pará State, Brazil: Lycopodiaceae and Selaginellaceae. Bol. Mus. Para. Emilio Goeldi Cienc. Nat. [online]. 2009, vol.4, n.1, pp.37-45. ISSN 1981-8114.

This work is part of a series of studies accomplishing the lycophytes and monilophytes from Caxiuanã National Forest, which encloses ca. 200,000 ha of terra firme forest, periodically flooded forests (várzea and igapó forest), savannoid vegetation and secondary vegetation. The studied area is situated in Melgaço and Portel municipalities, and limited at North by the coordinates 01^o 37' S / 51^o 19' W and 01^o 54' S / 51^o 58' W, and at South by 02^o 15' S / 51^o 15' W e 02^o 15' S / 51^o 56' W. For the analysis and taxonomic identifications of the collected specimens, usual techniques and specialized literature were used. The lycophytes are represented by four species: two Lycopodiaceae, Huperzia linifolia (L.) Trevis. var. jenmanii (Underw. & F. E. Lloyd) B. Øllg. & P. G. Windisch and Lycopodiella cernua (L.) Pic. Serm., and two Selaginellaceae, Selaginella conduplicata Spring and S. parkeri (Hook. & Grev.) Spring. Identifications Keys for genera and species are presented, besides taxonomic comments, illustrations, distributions and habitat data.

Palavras-chave : Selaginella; Huperzia; Lycopodiella; Lycophyta.

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