Morphological and molecular investigations of Paramecium schewiakoffi sp. nov. (Ciliophora, Oligohymenophorea) and current status of distribution and taxonomy of Paramecium spp.

  title={Morphological and molecular investigations of Paramecium schewiakoffi sp. nov. (Ciliophora, Oligohymenophorea) and current status of distribution and taxonomy of Paramecium spp.},
  author={Sergei I. Fokin and Ewa Przyb{\'o}s and Serge M. Chivilev and Cora L Beier and Matthias Horn and Bogumiła Skotarczak and Beata Wodecka and Masahiro Fujishima},
  journal={European Journal of Protistology},

Description and molecular phylogeny of Paramecium grohmannae sp. nov. (Ciliophora, Peniculida) from a wastewater treatment plant in Brazil

A new morphological species of Paramecium Muller, 1773, was discovered in samples of water with activated sludge of a wastewater treatment plant in Rio de Janeiro, Brazil and its phylogenetic position hypothesized from 18S-rDNA analyses is unambiguously placed within the P. multimicronucleatum complex.

Morphological and Molecular Characterization of Paramecium (Viridoparamecium nov. subgen.) chlorelligerum Kahl (Ciliophora)

The molecular investigations show that P. chlorelligerum forms a distinct branch distant from the P. (Chloroparamecium) bursaria clade, and this species is redescribed in a new subgenus: Paramecium (Viridoparamcium) chloreLLigerum.

Cryptic Diversity in Paramecium multimicronucleatum Revealed with a Polyphasic Approach

The morphological and molecular characterization of two novel Paramecium species are provided and it is shown that the number and structure of micronuclei, traditionally utilized to discriminate species in Parame calcium, vary not only between but also within each of the three studied species and, thus, cannot be considered a reliable feature for species identification.

Intraspecific genetic divergence of Paramecium bursaria and re-construction of the paramecian phylogenetic tree

Summary. Paramecium bursaria, a species belonging to the genus Paramecium, is quite unique in that the species intracellularly maintains several hundreds of symbiotic algae. This species has been

Paramecium jenningsi complex: existence of three cryptic species confirmed by multi-locus analysis and strain crosses

The studied species meet the criteria of a species complex because they can be differentiatedbased on strain crosses and molecular characteristics, but they cannot be differentiated based on morphological features alone.

“Candidatus Gortzia shahrazadis”, a Novel Endosymbiont of Paramecium multimicronucleatum and a Revision of the Biogeographical Distribution of Holospora-Like Bacteria

A novel species belonging to the “Ca. Gortzia” genus, detected in P. multimicronucleatum, a ciliate for which infection by an HLB has not been reported, discovered in India is described.




The term Paramecium was coined by Dr. John Hill of London in 1752 for a group of animalcules comprising “? four species,― two of which probably inc,lude members of the genus Paramecium as

Phylogenetic relationships of the genus Paramecium inferred from small subunit rRNA gene sequences.

The genus Paramecium includes species that are well known and very common in freshwater environments and are closely related and strongly supported as a monophyletic group.


On September 27, 1909, I received from Dr. Powers two sample cultures of Paramecia with the request that I investigate them as to type and purity of culture, and they proved to be neither typical Paramecium caudatum nor Parame calcium aurelia, although most of their characters differed but little from these well-known types.

Paramecium polycaryum, sp. nov

The present paper records the discovery of a Paramecium characterized by the general body form of the “bursaria group” and the micronuclear structure of the "aurelia type,” but possessing several (three to eight) micronuclei.

Nuclear Reorganization Variety in Paramecium (Ciliophora: Peniculida) and its Possible Evolution

The nuclear reorganization pathway of Paramecium during conjugation was investigated for 12 morphospecies and it seems, the taxonomic species with shorter immaturity period and outbreeding strategy could show faster evolution rate.

Phylogenetic Relationships of the Subclass Peniculia (Oligohymenophorea, Ciliophora) Inferred from Small Subunit rRNA Gene Sequences

It is concluded that the Subclass Peniculia should be divided into two orders, the Order Urocentrida and Order Peniculida, with the latter order having two suborders, the Suborder Frontoniina and PenicULina.

Fast and Accurate Identification of European Species of the Paramecium aurelia Complex by RAPD-Fingerprints

A 10-mer random primer that generated fingerprints highly specific for nine different P. aurelia species was developed, and field studies are now possible to answer basic questions concerning the ecology of Paramecium.

Data on the occurrence of species of the Paramecium aurelia complex world-wide

The greatest data on distributionand frequency of occurrence of the particular species of the P. aurelia complex concerns Europe, and the following conclusions were drawn: P. novaurelia is a dominantspecies, while P. primaurelia (in 103 habitats) is also characteristic but less frequent.

Paramecium sonneborni n. sp., a New Member of the Paramecium aurelia Species-Complex†

A Parame calcium isolated from an intermittent stream in College Station, Texas, can be assigned to the Paramecium aurelia species-complex, and it can be distinguished from other members of that complex on the basis of mating-type reactivity and isoenzyme patterns.

Soil ciliates (protozoa, ciliophora) from Namibia (Southwest Africa), with emphasis on two contrasting environments, the Etosha Region and the Namib Desert

The monograph contains only one third of the species actually living in the highly diverse terrestrial habitats of Namibia, and shows that there must be many more free-living ciliate species globally than the 3000 estimated by FlNLAY.