Untangling Pseudocrossidium crinitum s. l. (Pottiaceae, Bryophyta) through molecular and morphometric analysis

Cano, María J.; Jiménez, Juan Francisco; Alonso, Marta; Jiménez, Juan A.

doi:10.1127/nova_hedwigia/2015/0290

Cited by 8 publications

(19 citation statements)

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“…67%), that is, Acaulon ). Guerramontesia was used to root the phylogeny, given the genus is supported as sister to the rest of the subfamily (Cano et al, 2010(Cano et al, , 2016Gallego et al, 2014). In total, the analysis included 1157 accessions, of which 1012 (87%) were newly sequenced for this study (289 for ITS, 264 of atpB-rbcL, 247 of trnL-F, and 212 of trnG); 145 additional sequences were downloaded from GenBank.…”

Section: Molecular Taxon Samplingmentioning

confidence: 99%

A multilocus phylogeny of the moss genus Didymodon and allied genera (Pottiaceae): Generic delimitations and their implications for systematics

Jiménez

Cano

Guerra

2021

J of Sytematics Evolution

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Didymodon s.l. is one of the largest genera in the moss family Pottiaceae, with about 122 species distributed in all continents. This, together with its high degree of morphological variation, has made it one of the taxonomically most challenging genera of Pottiaceae. Circumscription of Didymodon s.l. has been, and still is, controversial. To date, the only molecular study that has investigated the delimitation of the genus has been far from comprehensive (35 samples from 27 species), limited in geographical scope (mainly restricted to Europe), and based exclusively on ITS sequences. To evaluate the circumscription of Didymodon s.l. and its relationships with the allied genera Andinella, Gertrudiella, and Tridontium, we conducted phylogenetic analyses of DNA sequences for three plastid markers (atpB-rbcL, trnG, and trnL-F) and one nuclear locus (ITS) for 335 samples representing 86 species of Didymodon s.l. (ca. 70%), and all taxa of the genera Andinella, Gertrudiella, and Tridontium. Individual markers and concatenated matrices were analyzed using maximum likelihood and Bayesian approaches. Our results indicate that Didymodon s.l. is not monophyletic, because Andinella, Gertrudiella, and Tridontium species are nested within it. Species of these four genera can be divided into eight well-supported and morphologically distinct genera: Didymodon s.s., Geheebia, Gertrudiella, Husnotiella, Trichostomopsis, Tridontium, Vinealobryum, and Zanderella. In correspondence with the results presented, 38 new combinations, 10 new synonyms, and a new name are provided for those taxa where required, and lectotypes are designated for 13 names. A diagnostic key to the eight recognized genera is provided.

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Section: Molecular Taxon Samplingmentioning

confidence: 99%

A multilocus phylogeny of the moss genus Didymodon and allied genera (Pottiaceae): Generic delimitations and their implications for systematics

Jiménez

Cano

Guerra

2021

J of Sytematics Evolution

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“…Molecular data together with morphological assessment often provide an optimal background for conclusive evidence for the taxonomic delimitation (e.g., [30,33,34]). Our multilocus genetic analysis based on both nuclear and plastid loci revealed a strong divergence between Didymodon gelidus and D. brachyphyllus, two species long considered conspecific and representing a widely distributed bipolar taxon (Fig.…”

Section: Discussionmentioning

confidence: 99%

Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region

et al. 2018

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The taxonomic position of the Antarctic subendemic species Didymodon gelidus Cardot is controversial, notably because of its notorious sterile condition. Considering the overall appearance and the reddish coloration of the plants, the leaf areolation, reaction of the leaf lamina with KOH, and the presence of multicellular axillary gemmae, this species was considered to be conspecific with the Holarctic D. brachyphyllus (Sull.) R. H. Zander. As a result, the latter was established as a bipolar species. Recent detailed morphological and anatomical studies have revealed a number of features which enable recognition of D. gelidus and D. brachyphyllus, including the shape of leaves, leaf apices and basal leaf cells, as well as costal anatomy. Here, within a larger-scale project focused on the evolution and biogeographical connections of Antarctic endemic mosses, we analyzed the genetic relationships of D. gelidus and D. brachyphyllus to confront the morphology-based conclusions. We selected five geographically distinct collections per species and applied a multilocus DNA analysis based on nuclear (ITS) and plastid (atpIH, trnLF, trnG, rps4) sequences to assess the genetic differentiation of these two taxa. We also placed their lineages in a wider phylogenetic context using an extended sampling of Didymodon taxa and select other representatives of Pottiaceae. Our results showed a clear genetic differentiation of the Southern Hemisphere (D. gelidus) and Northern Hemisphere (D. brachyphyllus) plants. Moreover, the phylogenetic analysis showed that D. gelidus formed a strongly supported clade on its own which was distantly related to D. brachyphyllus. Accordingly, the two taxa do not represent geographical vicariants. Didymodon gelidus must be considered a distinct endemic species of the austral polar region, having its optimal occurrence in the Antarctic and weakly penetrating northward to South Georgia and Îles Kerguelen in the Subantarctic. The relatively isolated phylogenetic position of D. gelidus likely suggests its old age.

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“…American species recorded from Argentina and Bolivia. In Argentina, it was previously recorded from Buenos Aires, Catamarca, Chubut, Jujuy, Salta, Tucumán (Cano et al, 2016). This species grows on soil and forms dense turfs.…”

Section: Distribution and Habitat It Is A Southmentioning

confidence: 99%

New records of mosses from the Dry Chaco forest of Santiago del Estero, Argentina

Jimenez

Suarez

Cabral³

2020

Bol. Soc. Argent. Bot.

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Background and aims: The bryophyte flora of Argentina is currently under study, nevertheless, there are still extensive areas unexplored, such as Santiago del Estero with only three records of bryophytes to the entire region. The aim of this work was to contribute to the knowledge of the moss flora of Santiago del Estero province, through the collection of samples in Copo National Park and surroundings. M&M: The specimens were collected in the Copo National Park and surroundings, processed and studied according to traditional techniques for bryophytes. Microscopic characters were observed with stereoscopic and light microscopy. A list of the species found is presented, with comments on the differentiating characters, habitat and distribution. Results: The following moss taxa were found to be new records for the province: Aloina rigida; Dimerodontium balansae; Didymodon umbrosus; Fabronia ciliaris; Macrocoma tenuis subsp. sullivantii; Pseudocrossidium arenicola; P. linearifolium; Stereophyllum radiculosum; Syntrichia chisosa, Trichostomum brachydontium and Venturiella glaziovii. The range of distribution of Tricherpodium beccarii is extended to the northeast of the province. Conclusions: Eleven species and one subspecies, distributed in ten genera and five families, are newly reported for the province of Santiago del Estero. The range of distribution of one species is extended to the northeast of the province. These first studies highlight the unexplored floristic richness of the region and its vulnerability due to the accelerated advance of the agricultural-livestock border.

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Untangling Pseudocrossidium crinitum s. l. (Pottiaceae, Bryophyta) through molecular and morphometric analysis

Cited by 8 publications

References 0 publications

A multilocus phylogeny of the moss genus Didymodon and allied genera (Pottiaceae): Generic delimitations and their implications for systematics

A multilocus phylogeny of the moss genus Didymodon and allied genera (Pottiaceae): Generic delimitations and their implications for systematics

Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region

New records of mosses from the Dry Chaco forest of Santiago del Estero, Argentina

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