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Darwiniana, nueva serie

Print version ISSN 0011-6793On-line version ISSN 1850-1699


ARANA, Marcelo D; PRADO, Jefferson  and  PONCE, Mónica. Revisión del género megalastrum (dryopteridaceae) para la Argentina. Darwiniana, nueva serie [online]. 2016, vol.4, n.2, pp.217-233. ISSN 0011-6793.

So far the information about the genus Megalastrum (Dryopteridaceae) for Argentina is fragmented and incomplete. A revision of Megalastrum in Argentina is here presented; it is represented by six species: M. adenopteris, M. ciliatum, M. connexum, M. crenulans, M. fugaceum, and M. spectabile. A key to the species is provided, plus descriptions, notes on distribution and habitat, as well as illustrations of diagnostic characters for each taxon. Megalastrum crenulans and M. spectabile are lectotypified. The species occur primarily in the Argentinean forests, with a disjunct distribution, three species grow in the north-western Yungas, two species grow in the Parana forest, and one species grows in the Valdivian temperate rain forest. Megalastrum pulverulentum and M. subincisum are excluded from the Argentinean flora.

Keywords : Dryopteridaceae; Eupolypods I; Ferns; Flora; Southern Cone; Taxonomy.

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