Tamara Villaverde
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View article: A tale of two lineages: comparative biogeography across the Southern Cone of two South American <i>Carex</i> (Cyperaceae) groups
A tale of two lineages: comparative biogeography across the Southern Cone of two South American <i>Carex</i> (Cyperaceae) groups Open
Background and Aims The Carex phalaroides group and Carex sect. Bracteosellae are two species complexes that exhibit similar distribution patterns, despite being two evolutionarily independent lineages. Their centre of diversity is display…
View article: Phylogenomics and phylogeographic model testing using convolutional neural networks reveal a history of recent admixture in the Canarian <i>Kleinia neriifolia</i>
Phylogenomics and phylogeographic model testing using convolutional neural networks reveal a history of recent admixture in the Canarian <i>Kleinia neriifolia</i> Open
Multiple‐island endemics (MIE) are considered ideal natural subjects to study patterns of island colonization that involve recent population‐level genetic processes. Kleinia neriifolia is a Canarian MIE widespread across the archipelago, w…
View article: The sweet tabaiba or there and back again: phylogeographical history of the Macaronesian <i>Euphorbia balsamifera</i>
The sweet tabaiba or there and back again: phylogeographical history of the Macaronesian <i>Euphorbia balsamifera</i> Open
Background and Aims Biogeographical relationships between the Canary Islands and north-west Africa are often explained by oceanic dispersal and geographical proximity. Sister-group relationships between Canarian and eastern African/Arabian…
View article: Seeking the identity of an enigmatic moss by embracing phylogenomics
Seeking the identity of an enigmatic moss by embracing phylogenomics Open
Currently, a wide range of genomic techniques is available at a relatively affordable price. However, not all of them have been equally explored in bryophyte systematics. In the present study, we apply next‐generation sequencing to identif…
View article: Geometric Morphometrics sheds light on the systematics affinities of two enigmatic dwarf Neotropical sedges (Carex, Cyperaceae)
Geometric Morphometrics sheds light on the systematics affinities of two enigmatic dwarf Neotropical sedges (Carex, Cyperaceae) Open
Geometric morphometrics (GM) is a powerful analytical tool that enables complete quantification of shapes. Its use in Botany has a great potential for complementing plant evolutionary and ecological studies. Taxonomic delimitation in Carex…
View article: Phylogenomics sheds new light on the drivers behind a long‐lasting systematic riddle: the figwort family Scrophulariaceae
Phylogenomics sheds new light on the drivers behind a long‐lasting systematic riddle: the figwort family Scrophulariaceae Open
Summary The figwort family, Scrophulariaceae, comprises c . 2000 species whose evolutionary relationships at the tribal level have proven difficult to resolve, hindering our ability to understand their origin and diversification. We design…
View article: An NGS-Based Phylogeny of Orthotricheae (Orthotrichaceae, Bryophyta) With the Proposal of the New Genus Rehubryum From Zealandia
An NGS-Based Phylogeny of Orthotricheae (Orthotrichaceae, Bryophyta) With the Proposal of the New Genus Rehubryum From Zealandia Open
Phylogenomic data increase the possibilities of resolving the evolutionary and systematic relationships among taxa. This is especially valuable in groups with few and homoplasious morphological characters, in which systematic and taxonomic…
View article: GoFlagmatrices-Orthotrichaceae
GoFlagmatrices-Orthotrichaceae Open
GoFlag project: individual matrices obtained in Orthotricaceae. Two datasets: Full Sequences and Probe Only matrices.
View article: Rare and widespread: integrating Bayesian MCMC approaches, Sanger sequencing and Hyb‐Seq phylogenomics to reconstruct the origin of the enigmatic Rand Flora genus <i>Camptoloma</i>
Rare and widespread: integrating Bayesian MCMC approaches, Sanger sequencing and Hyb‐Seq phylogenomics to reconstruct the origin of the enigmatic Rand Flora genus <i>Camptoloma</i> Open
Premise Genera that are widespread, with geographically discontinuous distributions and represented by few species, are intriguing. Is their achieved disjunct distribution recent or ancient in origin? Why are they species‐poor? The Rand Fl…
View article: An integrative monograph of <i>Carex</i> section <i>Schoenoxiphium</i> (Cyperaceae)
An integrative monograph of <i>Carex</i> section <i>Schoenoxiphium</i> (Cyperaceae) Open
Carex section Schoenoxiphium (Cariceae, Cyperaceae) is endemic to the Afrotropical biogeographic region and is mainly distributed in southern and eastern Africa, with its center of diversity in eastern South Africa. The taxon was formerly …
View article: A new classification of Cyperaceae (Poales) supported by phylogenomic data
A new classification of Cyperaceae (Poales) supported by phylogenomic data Open
Cyperaceae (sedges) are the third largest monocot family and are of considerable economic and ecological importance. Sedges represent an ideal model family to study evolutionary biology due to their species richness, global distribution, l…
View article: Ecological and geological processes impacting speciation modes drive the formation of wide‐range disjunctions within tribe Putorieae (Rubiaceae)
Ecological and geological processes impacting speciation modes drive the formation of wide‐range disjunctions within tribe Putorieae (Rubiaceae) Open
Wide‐range geographically discontinuous distributions have long intrigued scientists. We explore the role of ecology, geology, and dispersal in the formation of these large‐scale disjunctions, using the angiosperm tribe Putorieae (Rubiacea…
View article: RADseq_matrix_20201218.phy.zip
RADseq_matrix_20201218.phy.zip Open
RADseq matrix of different species in section Schoenoxiphium (Carex, Cyperaceae)
View article: Assessing the sensitivity of divergence time estimates to locus sampling, calibration points, and model priors in a RAD‐seq phylogeny of<i>Carex</i>section<i>Schoenoxiphium</i>
Assessing the sensitivity of divergence time estimates to locus sampling, calibration points, and model priors in a RAD‐seq phylogeny of<i>Carex</i>section<i>Schoenoxiphium</i> Open
Restriction site‐associated DNA sequencing (RAD‐seq) and related methods have become relatively common approaches to resolve species‐level phylogeny. It is not clear, however, whether RAD‐seq data matrices are well suited to relaxed clock …
View article: A framework infrageneric classification of<i>Carex</i>(Cyperaceae) and its organizing principles
A framework infrageneric classification of<i>Carex</i>(Cyperaceae) and its organizing principles Open
Phylogenetic studies of Carex L. (Cyperaceae) have consistently demonstrated that most subgenera and sections are para‐ or polyphyletic. Yet, taxonomists continue to use subgenera and sections in Carex classification. Why? The Global Carex…
View article: A new classification of<i>Carex</i>(Cyperaceae) subgenera supported by a HybSeq backbone phylogenetic tree
A new classification of<i>Carex</i>(Cyperaceae) subgenera supported by a HybSeq backbone phylogenetic tree Open
The field of systematics is experiencing a new molecular revolution driven by the increased availability of high-throughput sequencing technologies. As these techniques become more affordable, the increased genomic resources have increasin…
View article: Tackling Rapid Radiations With Targeted Sequencing
Tackling Rapid Radiations With Targeted Sequencing Open
In phylogenetic studies across angiosperms, at various taxonomic levels, polytomies have persisted despite efforts to resolve them by increasing sampling of taxa and loci. The large amount of genomic data now available and statistical tool…
View article: A tale of worldwide success: Behind the scenes of <i>Carex</i> (Cyperaceae) biogeography and diversification
A tale of worldwide success: Behind the scenes of <i>Carex</i> (Cyperaceae) biogeography and diversification Open
The megadiverse genus Carex (c. 2000 species, Cyperaceae) has a nearly cosmopolitan distribution, displaying an inverted latitudinal richness gradient with higher species diversity in cold‐temperate areas of the Northern Hemisphere. Despit…
View article: Bridging the micro‐ and macroevolutionary levels in phylogenomics: Hyb‐Seq solves relationships from populations to species and above
Bridging the micro‐ and macroevolutionary levels in phylogenomics: Hyb‐Seq solves relationships from populations to species and above Open
Summary Reconstructing phylogenetic relationships at the micro‐ and macroevoutionary levels within the same tree is problematic because of the need to use different data types and analytical frameworks. We test the power of target enrichme…
View article: Bipolar distributions in vascular plants: A review
Bipolar distributions in vascular plants: A review Open
Bipolar disjunct distributions are a fascinating biogeographic pattern exhibited by about 30 vascular plants, whose populations reach very high latitudes in the northern and southern hemispheres. In this review, we first propose a new fram…
View article: Niche shifts after long‐distance dispersal events in bipolar sedges (<i>Carex</i>, Cyperaceae)
Niche shifts after long‐distance dispersal events in bipolar sedges (<i>Carex</i>, Cyperaceae) Open
PREMISE OF THE STUDY: Bipolar species represent the greatest biogeographical disjunction on Earth, raising many questions about the colonization and adaptive processes behind such striking distribution. We investigated climatic niche diffe…
View article: American amphitropical disjuncts: Perspectives from vascular plant analyses and prospects for future research
American amphitropical disjuncts: Perspectives from vascular plant analyses and prospects for future research Open
PREMISE OF THE STUDY: Historical patterns and processes of plants with an American amphitropical disjunct (AAD) distribution have long interested botanists and biogeographers. Here we update examples of AAD vascular plants, their biogeogra…
View article: Long‐distance dispersal explains the bipolar disjunction in <i>Carex macloviana</i>
Long‐distance dispersal explains the bipolar disjunction in <i>Carex macloviana</i> Open
PREMISE OF THE STUDY: The sedge Carex macloviana d'Urv presents a bipolar distribution. To clarify the origin of its distribution, we consider the four main hypotheses: long‐distance dispersal (either by mountain hopping or by direct dispe…
View article: Two new species in Carex sect. Schoenoxiphium (Cyperaceae) from southern Africa
Two new species in Carex sect. Schoenoxiphium (Cyperaceae) from southern Africa Open
Carex sect. Schoenoxiphium (18 spp.) is a monophyletic group that has its centre of diversity in eastern south Africa. We describe two new species from the Republic of South Africa and Lesotho on the basis of morphological characters. Both…
View article: Two independent dispersals to the Southern Hemisphere to become the most widespread bipolar Carex species: biogeography of C. canescens (Cyperaceae)
Two independent dispersals to the Southern Hemisphere to become the most widespread bipolar Carex species: biogeography of C. canescens (Cyperaceae) Open
About 30 plant species occur at high latitudes in both hemispheres, thus achieving a so-called bipolar distribution. Six of these species belong to Carex, of which just one, Carex canescens, occurs on two different landmasses in the Southe…
View article: Specimens at the Center: An Informatics Workflow and Toolkit for Specimen-level Analysis of Public DNA Database Data
Specimens at the Center: An Informatics Workflow and Toolkit for Specimen-level Analysis of Public DNA Database Data Open
Major public DNA databases — NCBI GenBank, the DNA DataBank of Japan (DDBJ), and the European Molecular Biology Laboratory (EMBL) — are invaluable biodiversity libraries. Systematists and other biodiversity scientists commonly mine these d…
View article: Megaphylogenetic Specimen-level Approaches to the <I>Carex</I> (Cyperaceae) Phylogeny Using ITS, ETS, and <I>matK</I> Sequences: Implications for Classification
Megaphylogenetic Specimen-level Approaches to the <i>Carex</i> (Cyperaceae) Phylogeny Using ITS, ETS, and <i>matK</i> Sequences: Implications for Classification Open
We present the first large-scale phylogenetic hypothesis for the genus Carex based on 996 of the 1983 accepted species (50.23%). We used a supermatrix approach using three DNA regions: ETS, ITS and matK. Every concatenated sequence was der…