Suggestions for a New Familial Classification of Pleurocarpous Mosses

Buck, William R.; Vitt, Dale H.

doi:10.2307/1221034

Cited by 93 publications

(120 citation statements)

References 29 publications

(15 reference statements)

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“…B. Vilas Bôas et al 135, 13-9-1995 (ALCB 28150 Os taxa encontrados não têm sua ocorrência restrita ao ambiente de cerrado, pois ocorrem também em outras formações vegetais, merecendo destaque, inclusive, Octoblepharum albidum que é encontrado em todas as formações vegetais do estado da Bahia, exceto manguezal, e apresenta ampla distribuição, sendo que, no Brasil, de acordo com Yano (1994), só não há registros para o estado de Tocantins. Entre as Bryophyta (musgos), pode ser observado um predomínio de espécies acrocárpicas em relação às pleurocárpicas, ocorrendo como terrícolas em locais mais abertos e ensolarados, o que está de acordo com a afirmação de Buck & Vitt (1986) segundo a qual as espécies acrocárpicas predominam em habitats expostos ou de características xéricas. As espécies pleurocárpicas ocorreram como epífitas corticícolas, formando sinúsias que ocupam a base de troncos de árvores, local mais protegido da insolação, constituindo, assim, sinúsias ciófilas.…”

Section: Dicranaceaeunclassified

Briófitas de uma área de Cerrado no município de Alagoinhas, Bahia, Brasil

Bôas‐Bastos

Bastos

1998

BDE

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Section: Dicranaceaeunclassified

Briófitas de uma área de Cerrado no município de Alagoinhas, Bahia, Brasil

Bôas‐Bastos

Bastos

1998

BDE

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“…Sporophytic characters have traditionally been considered the most important criteria in moss classification at all taxonomic levels. Sporophytes are, however, subjected to environmental pressures as are the gametophytes (Hedenäs, 2001(Hedenäs, , 2002, and sporophytic characters can be as homoplastic and therefore misleading in moss classifications as gametophyte characters at and above the family level (Buck, 1991). A good example of parallel evolution of sporophytic characters was shown in a study by , who concluded that structural reduction in the sporophytes has independently taken place in the Brachytheciaceae in several lineages representing all four subfamilies.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Neckeraceae (Bryophyta): Resolving the backbone phylogeny

Olsson

Buchbender

Enroth

et al. 2009

Systematics and Biodiversity

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Earlier phylogenetic studies, including species belonging to the Neckeraceae, have indicated that this pleurocarpous moss family shares a strongly supported sister group relationship with the Lembophyllaceae, but the family delimitation of the former needs adjustment. To test the monophyly of the Neckeraceae, as well as to redefine the family circumscription and to pinpoint its phylogenetic position in a larger context, a phylogenetic study based on molecular data was carried out. Sequence data were compiled, combining data from all three genomes: nuclear ITS1 and 2, plastid trnS-rps4-trnT-trnL-trnF and rpl16, and mitochondrial nad5 intron. The Neckeraceae have sometimes been divided into the two families, Neckeraceae and Thamnobryaceae, a division rejected here. Both parsimony and Bayesian analyses of molecular data revealed that the family concept of the Neckeraceae needs several further adjustments, such as the exclusion of some individual species and smaller genera as well as the inclusion of the Leptodontaceae. Within the family three wellsupported clades (A, B and C) can be distinguished. Members of clade A are mainly non-Asiatic and nontropical. Most species have a weak costa and immersed capsules with reduced peristomes (mainly Neckera spp.) and the teeth at the leaf margins are usually unicellular. Clade B members are also mainly non-Asiatic. They are typically fairly robust, distinctly stipitate, having a single, at least relatively strong costa, long setae (capsules exserted), and the peristomes are well developed or only somewhat reduced. Members of clade C are essentially Asiatic and tropical. The species of this clade usually have a strong costa and a long seta, the seta often being mammillose in its upper part. The peristome types in this clade are mixed, since both reduced and unreduced types are found. Several neckeraceous genera that were recognised on a morphological basis are polyphyletic (e.g. Neckera, Homalia, Thamnobryum, Porotrichum). Ancestral state reconstructions revealed that currently used diagnostic traits, such as the leaf asymmetry and costa strength are highly homoplastic. Similarly, the reconstructions revealed that the 'reduced' sporophyte features have evolved independently in each of the three clades.

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“…Furthermore, the systematic position of Echinodiaceae within the pleurocarpous mosses remains ambiguous. Echinodiaceae have been placed near various pleurocarpous families in the former Isobryales (e.g., Fleischer 1909Fleischer -1923Brotherus 1925;Walther 1983) or Hypnobryales (especially the Thuidiaceae; e.g., Robinson 1971;Vitt 1984;Buck and Vitt 1986). Interestingly, none of these authors questioned the monophyly of the family Echinodiaceae or its taxonomic rank.…”

Section: Introductionmentioning

confidence: 99%

Explaining the ‘anomalous’ distribution of Echinodium (Bryopsida: Echinodiaceae): Independent evolution in Macaronesia and Australasia

Stech

Sim‐Sim

Esquível³

et al. 2008

Organisms Diversity & Evolution

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The peculiar disjunction between Macaronesia and Australasia of the morphologically isolated pleurocarpous moss genus Echinodium is one of the most prominent questions in bryology. Echinodium as traditionally circumscribed comprises six extant species, four restricted to the Macaronesian archipelagos and two confined to the Australasian/ Pacific regions. Molecular phylogenetic analyses based on plastid trnL UAA intron and nuclear ribosomal ITS sequences indicate that Echinodium is polyphyletic and split into three groups. Three of the four Macaronesian species (E. spinosum and the single island endemics E. renauldii and E. setigerum) are closely related to each other and treated as Echinodium s.str. (Echinodiaceae). Further clarification of the relationships of Echinodium s.str. with Orthostichella, a segregate of Lembophyllaceae, is needed. The remaining Macaronesian species, E. prolixum, is transferred to Isothecium (Lembophyllaceae); this systematic position is also strongly supported by leaf characters. The two Australasian species, E. hispidum and E. umbrosum, are molecularly unrelated to the Macaronesian species and are transferred to Thamnobryum in the Neckeraceae. While the molecular data suggest that the peculiar distribution pattern of 'Echinodium' is an artefact, the striking morphological similarity observed in Macaronesian and Australasian species cannot be dismissed. Possible explanations are: (i) parallel morphological evolution of the 'Echinodium habit' in Macaronesia and Australasia, or (ii) retention of a set of plesiomorphic characters in non-related groups in relict habitats, the Macaronesian laurel forest and the austral temperate rain forests, respectively. Of these hypotheses, the evolutionary parallelism hypothesis seems more plausible for several reasons, which are discussed.

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Suggestions for a New Familial Classification of Pleurocarpous Mosses

Cited by 93 publications

References 29 publications

<p><strong>Briófitas de uma área de Cerrado no município de Alagoinhas, Bahia, Brasil</strong></p>

<p><strong>Briófitas de uma área de Cerrado no município de Alagoinhas, Bahia, Brasil</strong></p>

Evolution of the Neckeraceae (Bryophyta): Resolving the backbone phylogeny

Explaining the ‘anomalous’ distribution of Echinodium (Bryopsida: Echinodiaceae): Independent evolution in Macaronesia and Australasia

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