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Independently Evolving Species in Asexual Bdelloid Rotifers
It is shown that a classic asexual clade, the bdelloid rotifers, has diversified into distinct evolutionary species and demonstrates how combined molecular and morphological analyses can shed new light on the evolutionary nature of species.
The widely used small subunit 18S rDNA molecule greatly underestimates true diversity in biodiversity surveys of the meiofauna
- C. Tang, F. Leasi, U. Obertegger, A. Kieneke, T. Barraclough, D. Fontaneto
- Environmental ScienceProceedings of the National Academy of Sciences
- 17 September 2012
It is shown that meiofaunal diversity has been greatly underestimated by 18S eDNA surveys and that the use of COI provides a better estimate of diversity, while estimates of species richness using COI were robust among three of four commonly used delimitation metrics, whereas estimates using 18S varied widely with the different metrics.
Effects of phylogenetic reconstruction method on the robustness of species delimitation using single-locus data
- C. Tang, A. M. Humphreys, D. Fontaneto, T. Barraclough, E. Paradis
- Biology, Environmental ScienceMethods in ecology and evolution
- 1 October 2014
This work assesses how robust the generalised mixed Yule coalescent and Poisson tree process methods are to different phylogenetic reconstruction and branch smoothing methods and recommends simultaneous use of the PTP model with any model‐based gene tree and GMYC approaches with BEAST trees for obtaining species hypotheses.
Molecular evidence for broad‐scale distributions in bdelloid rotifers: everything is not everywhere but most things are very widespread
- D. Fontaneto, T. Barraclough, Kimberly Chen, C. Ricci, E. Herniou
- BiologyMolecular ecology
- 1 July 2008
Although ‘everything is not everywhere’, bdelloid rotifers do display broad distributions typical of those of other microscopic organisms, which might be factors lessening the evolutionary cost of long‐term abstinence from sexual reproduction in this famous group of obligate parthenogens.
Fifteen species in one: deciphering the Brachionus plicatilis species complex (Rotifera, Monogononta) through DNA taxonomy
- Scott Mills, J. A. Alcántara‐Rodríguez, E. Walsh
- Biology, Environmental ScienceHydrobiologia
- 1 July 2017
A dataset of previously available and newly generated sequences of COI and ITS1 for 1273 isolates of the Brachionus plicatilis complex is collated and used to explore phylogenetic signal in morphometric and ecological traits, and to understand correlation among the traits using phylogenetic comparative models.
Guidelines for DNA taxonomy, with a focus on the meiofauna
The recent advances in the acquisition of DNA sequence data and the analytical tools for DNA-based species delimitation are reviewed, with a focus on applications to the meiofauna.
Biogeography of microscopic organisms : is everything small everywhere?
- D. Fontaneto
- Environmental Science
The author reveals contrasting patterns of intercontinental gene flow in arctic-alpine and boreal-temperate fungi and a metacommunity perspective on the phylo- and biogeography of small organisms.
Evidence for inefficient selection against deleterious mutations in cytochrome oxidase I of asexual bdelloid rotifers.
- T. Barraclough, D. Fontaneto, C. Ricci, E. Herniou
- BiologyMolecular biology and evolution
- 1 September 2007
It is concluded that bdelloid mitochondrial DNA variation does display the signature of inefficient selection expected of obligate asexuals, and higher frequencies of putatively deleterious amino acid polymorphism within populations than the two facultatively sexual clades.
Comparative genomics of bdelloid rotifers: Insights from desiccating and nondesiccating species
It is found that ancestral tetraploidy is conserved among all 4 bdelloid species, but homologous divergence in obligately aquatic Rotaria genomes is unexpectedly low, which calls into question the proposed role of desiccation in mediating horizontal genetic transfer.
Patterns of diversity in microscopic animals: are they comparable to those in protists or in larger animals?
Bdelloid rotifers have some of the peculiarities of protist biodiversity, although at slightly different spatial scales, thus confirming the idea of a major change in biodiversity patterns among organisms shorter than 2 mm.