P. Vďačný

Publications70
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Citations678
Highly Influential Citations19
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Molecular and morphological evidence for a sister group relationship of the classes Armophorea and Litostomatea (Ciliophora, Intramacronucleata, Lamellicorticata infraphyl. nov.), with an account on…
TLDR
An evolutionary scenario is proposed, explaining both the sister relationship of the Armophorea and Litostomatea, as well as the basal position of the morphologically complex dileptids. Expand
Molecular phylogeny and species delimitation within the ciliate genus Spirostomum (Ciliophora, Postciliodesmatophora, Heterotrichea), using the internal transcribed spacer region.
TLDR
This work addressed species boundaries within the genus Spirostomum, using the ITS1-5.8S-ITS2 region and the secondary structure of the ITS2 molecule, and 18S and 28S (D1D2) sequences additionally. Expand
A Proposed Timescale for the Evolution of Armophorean Ciliates: Clevelandellids Diversify More Rapidly Than Metopids
TLDR
Diversification processes and reconstruction of ancestral morphologies improve the understanding of paraphyly which occurs in groups of organisms with an apparently long evolutionary history and when speciation prevails over extinction. Expand
Morphology and Molecular Phylogeny of Apoterritricha lutea n. g., n. sp. (Ciliophora, Spirotrichea, Hypotrichia): A Putative Missing Link Connecting Cyrtohymena and Afrokeronopsis
TLDR
A hypothesis is proposed that is not unambiguously rejected by the present phylogenetic analyses, which shows how the Afrokeronopsis‐like pattern could have evolved from a Rubrioxytricha‐like ancestor via an Apoterritricha-like stage by cirri‐multiplication. Expand
Estimation of divergence times in litostomatean ciliates (Ciliophora: Intramacronucleata), using Bayesian relaxed clock and 18S rRNA gene.
  • P. Vďačný
  • Biology, Medicine
  • European journal of protistology
  • 1 August 2015
TLDR
To understand diversification dynamic of litostomateans, divergence times of their main groups were estimated with the Bayesian molecular dating, a technique allowing relaxation of molecular clock and incorporation of flexible calibration points. Expand
Evolutionary Associations of Endosymbiotic Ciliates Shed Light on the Timing of the Marsupial–Placental Split
  • P. Vďačný
  • Biology, Medicine
  • Molecular biology and evolution
  • 11 April 2018
TLDR
Time-calibrated phylogeny of main trichostome lineages might help to elucidate controversies in the geological and molecular timing of the split between marsupials and placental mammals. Expand
Reconstruction of Evolutionary History of Pleurostomatid Ciliates (Ciliophora, Litostomatea, Haptoria): Interplay of Morphology and Molecules
Pleurostomatids are raptorial ciliates that form a very distinct group within the Haptoria. Traditionally, the order Pleurostoma- tida was divided into two families: the Amphileptidae with two… Expand
A huge diversity of metopids (Ciliophora, Armophorea) in soil from the Murray River floodplain, Australia. I. Description of five new species and redescription of Metopus setosus Kahl, 1927.
TLDR
Six metopid ciliates from soil of the Murray River floodplain in Australia were studied using live observation, various silver impregnation methods, scanning electron microscopy, and multivariate statistics to corroborate the distinctness of these six meetopid populations. Expand
Dawn of astome ciliates in light of morphology and time-calibrated phylogeny of Haptophrya planariarum, an obligate endosymbiont of freshwater turbellarians.
TLDR
Astomes are found as a distinct group that evolved from a free-living scuticociliate ancestor in the early Paleozoic, and molecular clock analyses indicated that astomes living in annelids diverged from those inhabiting turbellarians within about 50 Ma during the Late Cambrian and the Upper Ordovician. Expand
Integrative taxonomy of ciliates: Assessment of molecular phylogenetic content and morphological homology testing.
  • P. Vďačný
  • Biology, Medicine
  • European journal of protistology
  • 24 February 2017
TLDR
Four phylogenetic techniques that may help address the issues of robust testing of morphological homology statements and the apomorphic nature of diagnostic characters of ciliate taxa are reviewed. Expand
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