Paulo Henrique Labiak

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• Premise of the study: As currently circumscribed, Lastreopsis has about 45 species and occurs in Australia, southern Asia, Africa, Madagascar, and the neotropics. Previous molecular phylogenetic studies suggested that Lastreopsis is paraphyletic. Our study focuses on resolving relationships among the lastreopsid ferns (Lastreopsis, Megalastrum, and(More)
Our recent molecular phylogenetic study revealed a previously unrecognized clade of six species that is sister to Elaphoglossum. Within this clade, four species are currently classified in Bolbitis, one in Lomagramma, and one in Acrostichum. For this clade, we propose the name Mickelia, with M. nicotianifolia as the type species. We also make new(More)
Recent molecular phylogenetic studies have shown that Lastreopsis is paraphyletic. Twenty-seven of its species belong to a separate clade for which the previously published generic name Parapolystichum is available. Parapolystichum is widely distributed, with four species in the Neotropics, six in Africa, nine in Madagascar, and eight in Australia and New(More)
UNLABELLED PREMISE OF THE STUDY The recognition of monophyletic genera for groups that have high levels of homoplastic morphological characters and/or conflicting results obtained by different studies can be difficult. Such is the case in the grammitid ferns, a clade within the Polypodiaceae. In this study, we aim to resolve relationships among four(More)
Stenogrammitis, a new genus of grammitid ferns, is segregated from Lellingeria based on morphological and molecular evidence. It differs from Lellingeria by linear leaves usually less than 5 mm wide, clathrate iridescent rhizome scales that are glabrous except for a single apical cilium, veins unbranched and only one per segment, fertile veins usually with(More)
We did a phylogenetic analysis on 21 of the 23 species of Stigmatopteris, a neotropical montane genus of wet forest floors. The analysis was based on four plastid markers: rbcL, rps4-trnS, trnG-trnR, and trnL-trnF. Two of the most closely related families to the Dryopteridaceae (Didymochlaenaceae and Hypodematiaceae) and 12 dryopteroid genera were used as(More)
Alansmia, a new genus of grammitid ferns is described and combinations are made for the 26 species known to belong to it. Alansmia is supported by five morphological synapomorphies: setae present on the rhizomes, cells of the rhizome scales turgid, both surfaces of the rhizome scales ciliate, laminae membranaceous, and sporangial capsules setose. Other(More)
A new hybrid,Micropolypodium xbradei, from Rio de Janeiro, Brazil, is described and illustrated. It shows intermediate morphology between its parents,M. setosum andTerpsichore achilleifolia, in dissection of blades and veins, and number of sori per segment. New combinations for Brazilian endemic species are presented based on this hybrid and on recent(More)
A new species, Thelypteris beckeriana (Thelypteridaceae), is here described. It belongs to subgenus Goniopteris because of the presence of forked and stellate hairs on some parts of its blades. It is a narrow endemic to the Atlantic Rain Forest of southern Bahia, Brazil. A complete description, illustrations, and comparisons with the most similar species(More)
A study of Brazilian species of Grammitidaceae revealed four undescribed species and three new combinations that need to be made. The new species appear to be narrow endemics, one in the state of Espírito Santo (Brazil), two in the mountains on the Brazil-Venezuelan border, and one in Ecuador. Descriptions and illustrations are provided, as well as(More)