Revisión de especies monomórficas y subdimórficas del género "Blechnum" ("Blechnaceae-Polypodiophyta")

Rolleri, Cristina Hilda; Prada, Cármen; Passarelli, Lilian Mónica; Galán, José María Gabriel y; Ciciarelli, María de las Mercedes

doi:10.5209/rev_bocm.2012.v36.39444

Cited by 8 publications

(14 citation statements)

References 25 publications

(17 reference statements)

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“…In our molecular tree and previous trees (Shepherd et al, 2007) Blechnum brasiliense is segregated from this arborescent group, in which it has been traditionally included (Rolleri et al, 2013). Some morphological features beyond the arborescent habit could support this position; B. brasiliense is the only arborescent species with monomorphic fronds and adnate pinnae that become reduced towards the base of the lamina.…”

Section: Discussionmentioning

confidence: 74%

“…The phylogenetic position of B. loxense, the only representative of its group (Tryon & Tryon, 1982), has been debated for a long time. Its isolated situation is sustained by a number of unique and interesting morphological features such as the strongly recurved pinnae with papillate-digitate marginal cells, papillate indusium, mucilaginous rhizomes, and slight dimorphism (Rolleri et al, 2012a). Similarities between B. stipitellatum (a cordatoid element) and B. loxense have been reported to such an extent that both have been considered mere shadow forms (Tryon & Stolze, 1993).…”

Section: Discussionmentioning

confidence: 95%

“…This arborescent clade is supported by many synapomorphic characters. Some morphological ones include the stout, massive vertical rhizomes, forming a more or less tall caudex; the long, acicular scales; an epidermal type of more-or-less rectangular cells; and densely folded spores (Ramos Giacosa, 2008;Rolleri et al, 2008;Passarelli et al, 2010;Rolleri et al, 2013). They also present some shared nucleotide indels in the trnL-trnF region.…”

Section: Discussionmentioning

confidence: 99%

“…The Blechnum occidentale group is quite distinctive because it contains monomorphic or subdimorphic herbaceous plants with pinnatisect or mostly 1-pinnate fronds (Rolleri et al, 2012b), and it has been treated as Blechnum subgen. Blechnum (Murillo, 1968).…”

Section: Discussionmentioning

confidence: 99%

“…Kuhn group, originally named B. buchtienii Rosenst. group (Rolleri et al, 2013) (Tryon & Tryon, 1982;Durán, 1997;Dittrich, 2005;Rolleri & Prada, 2006b;Passarelli, 2007;Prada et al, 2007;Gabriel y Galán et al, 2008;Ramos Giacosa, 2008;Rolleri et al, 2008;Passarelli et al, 2010;Rolleri et al, 2010;Gabriel y Galán et al, 2011;Rolleri et al, 2012a;Rolleri et al, 2012b;Rolleri et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

Galán¹,

Prada²,

Rolleri³

et al. 2013

Turk J Bot

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International audienceBlechnaceae is an important leptosporangiate family (9-10 genera, about 250 species). It is monophyletic and distributed mainly in tropical America and Australasia. Among the species 80% belong to Blechnum, a genus with a very complex taxonomy and uncertain internal relationships. In terms of American diversity, the results of morphological studies have arrived at 8 informal groups. Molecular works on this genus are scarce, and there is no information for the majority of American species. The main objective of this work was to evaluate whether the groups proposed to organise the diversity of American of Blechnum are consistent with a molecular analysis. We sequenced 2 chloroplastic regions from species representing all of the groups. In our molecular analysis most of the informal groups were maintained as well supported clades. Only 2 species, B. brasiliense and B. spicant, appear to be isolated from their alleged relatives. Combining our molecular results with previous morphological knowledge, we propose the recognition of 4 lineages: 1) B. serrulatum , 2) B. spicant, and 3) core Blechnum, which represents a large clade that can be divided into core Blechnum I (arborescent species, cordatoids, and B. brasiliense) and core Blechnum II (epiphytic species and herbaceous terrestrials, both monomorphic and dimorphic groups)

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Section: Discussionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

Galán¹,

Prada²,

Rolleri³

et al. 2013

Turk J Bot

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A multi‐character analysis of Struthiopteris leads to the rescue of Spicantopsis (Blechnaceae, Polypodiopsida)

Molino

Galán

Sessa

et al. 2019

TAXON

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The family Blechnaceae is a moderately sized leptosporangiate fern lineage, with 24 genera and around 250 species. Struthiopteris accommodates small to medium-sized, dimorphic, pinnate species. It is composed of six northern species: S. spicant is distributed in western parts of Europe and North America; S. fallax is endemic to Iceland; S. niponica, S. amabilis and S. castanea are endemic to Japan, and S. hancockii occurs in Japan and Taiwan. Due to the lack of a global review and to its highly interesting geographical distribution, this genus merits further study to clarify its taxonomy, species relationships, and distributional pattern. The present study aims to achieve the following goals: (a) identify and describe morphological characters supporting the taxonomy of Struthiopteris; (b) reconstruct a complete phylogeny for the genus; (c) study the biogeographical history of Struthiopteris at a global scale. The morphological study involved the observation of characters ranging from rhizome scales to spores over 164 individuals. Phylogenies were constructed applying ML and BI techniques over 51 newly produced sequences of three chloroplast markers (rbcL, trnL-trnF, psbA-trnH), using the species Blechnidium melanopus and Brainea insignis as closest relatives. For the molecular dating and historical biogeography analyses, we estimated and compared ancestral ranges under several models. Most of the morphological characters led us to discern two groups of species: the S. spicant group (S. spicant, S. fallax, and S. castanea) and the S. niponica group (the remaining species). In our molecular phylogeny, the supposed sister genus Blechnidium always appeared as nested within Struthiopteris, rendering this genus non-monophyletic. The two groups identified by the morphology appeared as monophyletic clades within Struthiopteris, with the clade S. spicant more closely related to Blechnidium than to the clade S. niponica. For all these reasons, we propose to rescue the now-disused genus Spicantopsis for the species belonging to the S. niponica group: indeed, this genus was created c. 100 years ago to reunite the same species S. amabilis, S. niponica, and S. hancockii. Our results suggest that all members of this group of genera (Blechnidium, Struthiopteris, Spicantopsis) emerged in East Asia about 85 mya, at a time when Japan was still part of the mainland. It appears that, for most of their history, the members of these genera have been confined to East Asia, with one dispersal to the Americas by an ancestor within Struthiopteris s.str., and additional dispersals to India and the Philippines by Blechnidium melanopus.

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Phylogenetics and historical biogeography of Lomaridium (Blechnaceae: Polypodiopsida)

Vicent

Galán

Sessa

2017

TAXON

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Blechnaceae is a worldwide family of leptosporangiate ferns composed of about 250 species. Most of the species in the family were recognised under a single large genus Blechnum until recently, when a new classification proposed the recognition of 24 genera. Given this new systematics of Blechnaceae, which largely resolves the genus‐level relationships in the family, there is a need for phylogenetic research to investigate relationships within the majority of the newly proposed genera. In this paper, we unravel the phylogenetic relationships and the historical biogeography of the species of Lomaridium, a genus including most of the hemiepiphytic species in the Blechnaceae. Our sampling includes 11 species, which represents 85% of the diversity in the genus and which covers the entire geographic distribution of the group. We constructed two datasets with three plastid markers: one for phylogenetic analyses (maximum likelihood, Bayesian inference) with four outgroups from phylogenetically close genera (Brainea, Lomaria, Sadleria, Woodwardi); and a second for molecular dating and historical biogeographic analyses that included a larger set of outgroups so that we could accurately reconstruct ancestral events at the base of Lomaridium, under different models. We are able to recognize four highly supported lineages: L. contiguum and the L. schottii, L. attenuatum, and L. fragile clades. Our results date the origin of Lomaridium at some point during the Paleocene epoch, and the most likely geographic area for its origin is Australia plus tropical Central and South America. Several dispersal events are inferred, all of which are most likely long‐distance dispersal events. From Australia, we infer a first dispersal event that brought the ancestor of the extant species L. contiguum to New Caledonia. In Central and South America, Lomaridium continued to diversify and colonized additional areas, including the Caribbean (L. binervatum), some Pacific islands (L. schottii), and Africa and Madagascar. While our goal in the current study was not to estimate the biogeographic or diversification history of all Blechnaceae, our analyses do suggest that the early history of the family was complex biogeographically, with extensive long‐distance dispersal events. Lomaridium exemplifies this high dispersal capacity, as a genus with only a modest number of species that have reached far‐flung regions of the globe via numerous long‐distance dispersal events.

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Revisión de especies monomórficas y subdimórficas del género "Blechnum" ("Blechnaceae-Polypodiophyta")

Cited by 8 publications

References 25 publications

cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

A multi‐character analysis of Struthiopteris leads to the rescue of Spicantopsis (Blechnaceae, Polypodiopsida)

Phylogenetics and historical biogeography of Lomaridium (Blechnaceae: Polypodiopsida)

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