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127 records returned

Intestinal ciliate composition found in the feces of the Cypriot wild donkey, Equus asinus Linnaeus, 1758.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Species composition and distribution of large intestinal ciliates was investigated in the feces from 13 Cypriot wild donkeys, free-living in the Karpaz national park, Northern Cyprus. We identified 16 ciliate genera and 22 species. This is the first report on intestinal ciliates in Cypriot wild donkeys, and no endemic species were observed. The genus Cycloposthium occurred in all animals. The mean number of ciliates was 3.0+/-2.5x10(4)cellsml(-1) of feces and the mean number of ciliate species per host was 6.5+/-4.8. Characteristics of the wild donkey ciliates was almost identical to those reported in other equids from...
Source: European Journal of Protistology - October 13, 2009 Category: Microbiology Authors: Gürelli G, Göçmen B Tags: Eur J Protistol Source Type: journals

Morphology, morphogenesis and gene sequence of a freshwater ciliate, Pseudourostyla cristata (Ciliophora, Urostyloidea) from the ancient Lake Biwa, Japan.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The urostyloid freshwater ciliate Pseudourostyla cristata was recorded for the first time from Lake Biwa, a 4-million-year-old lake located in Shiga Prefecture, Japan. Its morphology and morphogenesis were investigated using live observation and protargol impregnation, and the SSU ribosomal RNA gene was sequenced. Based on the current observations and previous descriptions, this species is readily recognized mainly by the following characters: body slender or broadly oval to elliptical, and dark grey in color; size in vivo about 170-400x40-150mum; pellicle flexible and contractile, with extrusomes forming a hyaline sea...
Source: European Journal of Protistology - September 20, 2009 Category: Microbiology Authors: Chen X, Li Z, Hu X, Kusuoka Y Tags: Eur J Protistol Source Type: journals

Morphogenesis of Kiitricha marina Nozawa, 1941 (Ciliophora, Spirotrichea), a possible model for the ancestor of hypotrichs s. L.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Recent studies suggested that the marine ciliate Kiitricha Nozawa, 1941 represents a basal branch in the spirotrichs. The present study reflects the morphogenetical investigation of Kiitricha marina Nozawa, 1941. The results listed below show an extremely unusual developmental pattern compared with all other known forms in the class Spirotrichea or hypotrichs s. l. PMID: 19767183 [PubMed - as supplied by publisher] (Source: European Journal of Protistology)
Source: European Journal of Protistology - September 17, 2009 Category: Microbiology Authors: Shao C, Song W, Warren A, Al-Rasheid KA Tags: Eur J Protistol Source Type: journals

Re-classification of Pheopolykrikos hartmannii as Polykrikos (Dinophyceae) based partly on the ultrastructure of complex extrusomes.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we report the first ultrastructural data for this species and demonstrate that Ph. hartmannii has all of the features that characterize the genus Polykrikos, including the synapomorphic "taeniocyst-nematocyst complex". We also demonstrate that the ultrastructure of the chloroplasts in Ph. hartmannii conforms to the usual peridinin-containing chloroplasts of most photosynthetic dinoflagellates, which improves inferences about the origin(s) and evolution of photosynthesis within the genus. After taking into account all of the ultrastructural data on polykrikoids presented here and in the literature, this speci...
Source: European Journal of Protistology - September 17, 2009 Category: Microbiology Authors: Hoppenrath M, Yubuki N, Bachvaroff TR, Leander BS Tags: Eur J Protistol Source Type: journals

Unikaryon phyllotretae sp. n. (Protista, Microspora), a new microsporidian pathogen of Phyllotreta undulata (Coleoptera; Chrysomelidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The microsporidium Unikaryon phyllotretae sp. n., a new pathogen of Phyllotreta undulata, is described based on light microscopic and ultrastructural characteristics. Microscopic examination of parasitized individuals revealed two types of spores. The majority of the spores were of the first type, which are oval and measured 2.74+/-0.17x1.93+/-0.17mum when fresh. Fresh spores of the second type (very rare) are elongated and measured 4.39+/-0.18x1.61+/-0.20mum. All life stages have single nuclei. Sporogony ends with uninucleate single sporoblasts and spores. The spores were only observed in Malpighian tubules. The isofi...
Source: European Journal of Protistology - September 17, 2009 Category: Microbiology Authors: Yaman M, Radek R, Weiser J, Toguebaye BS Tags: Eur J Protistol Source Type: journals

Rhizamoeba neglecta n. sp. (Amoebozoa, Tubulinea) from the bottom sediments of freshwater Lake Leshevoe (Valamo Island, North-Western Russia), with notes on the phylogeny of the order Leptomyxida.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new species of Leptomyxida, named Rhizamoeba neglecta was found during studies of the amoeba fauna of the inner Lake Leshevoe located at Valamo archipelago (The Lake Ladoga, North-Western Russia). Light-microscopical and ultrastructural studies indicated that it represents a new species of Leptomyxida. The partial 18S rDNA sequence of this amoeba is very similar to that of Leptomyxa reticulata.. These organisms, however, are very different in LM morphology and biology. Organisms assigned to the genus Rhizamoeba do not form a single clade in the 18S rDNA tree. This may indicate that the genus is an artificial grouping...
Source: European Journal of Protistology - July 31, 2009 Category: Microbiology Authors: Smirnov A, Nassonova E, Fahrni J, Pawlowski J Tags: Eur J Protistol Source Type: journals

The European Journal of Protistology - changes, chances and challenges.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19559359 [PubMed - in process] (Source: European Journal of Protistology)
Source: European Journal of Protistology - July 1, 2009 Category: Microbiology Authors: Weisse T Tags: Eur J Protistol Source Type: journals

Community structure and seasonal dynamics of planktonic ciliates along salinity gradients.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The ciliate community structure and seasonal dynamics in a solar saltern of the Yellow Sea were studied based on 4 sampling dates and 8 stations with salinities from 27.7 per thousand to 311.0 per thousand. The effects of the type and concentration of the fixative used (Lugol's and Bouin's) were tested at the first sampling date. Fixative type and fixative concentration had significant effects on ciliate abundance and biovolume, with 1% Lugol's giving the best results. A detailed investigation using live observations and protargol staining techniques revealed a total of 98 morphospecies from 8 sampling stations. There ...
Source: European Journal of Protistology - June 11, 2009 Category: Microbiology Authors: Lei Y, Xu K, Ki Choi J, Pyo Hong H, Wickham SA Tags: Eur J Protistol Source Type: journals

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Eur J Protistol. 2009 Jun 3; Authors: Hausmann K PMID: 19500955 [PubMed - as supplied by publisher] (Source: European Journal of Protistology)
Source: European Journal of Protistology - June 3, 2009 Category: Microbiology Authors: Hausmann K Tags: Eur J Protistol Source Type: journals

Morphological and molecular characterization of Histiobalantium natans viridis (Ciliophora, Scuticociliatia).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We investigated a Histiobalantium natans viridis population from the ancient Lake Biwa in Japan, using live observation, silver impregnation, and the small subunit rRNA gene sequence. The morphological and molecular data show, with high support, a close relationship of Histiobalantium, Schizocalyptra and Pleuronema, supporting the family Pleuronematidae Kent, whose nearest relatives are the Cyclidiidae Ehrenberg. A family Histiobalantiidae Puytorac and Corliss is not supported, either by the nucleotide sequences or the morphologic data, except for the curious dorsal location of the cytopyge. Likewise, the data do not s...
Source: European Journal of Protistology - June 2, 2009 Category: Microbiology Authors: Foissner W, Kusuoka Y, Shimano S Tags: Eur J Protistol Source Type: journals

Morphology and divisional morphogenesis of Nudiamphisiella interrupta Foissner, Agatha & Berger, 2002 (Ciliophora: Stichotrichia) based on a Brazilian strain.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Morphology and divisional morphogenesis of Nudiamphisiella interrupta Foissner, Agatha & Berger, 2002 (Ciliophora: Stichotrichia) based on a Brazilian strain. Eur J Protistol. 2009 May 18; Authors: da Silva Paiva T, da Silva-Neto ID The morphology and divisional morphogenesis of a Brazilian strain of Nudiamphisiella interrupta were characterized. The organisms were investigated after protargol impregnation. Interphase cells of N. interrupta fitted the original description. Stomatogenesis in dividing cells occurred apokinetally, left of the amphisiellid cirral row, and the ventral ciliature was derived from ...
Source: European Journal of Protistology - May 18, 2009 Category: Microbiology Authors: da Silva Paiva T, da Silva-Neto ID Tags: Eur J Protistol Source Type: journals

The morphology and morphogenesis of a marine ciliate, Epiclintes auricularis rarisetus nov. sspec. (Ciliophora, Epiclintidae), from the Yellow Sea.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology and morphogenesis of a marine ciliate, Epiclintes auricularis rarisetus nov. sspec., collected from Qingdao, northern China were studied on live and protargol-impregnated specimens. This isolate can be recognized by its elongate, contractile and tripartite body with a size of 200-400x20-40mum in vivo, about 30 ventrally located adoral membranelles, short undulating membranes, 2-3 frontal and 10-18 transverse cirri as well as 8-9 fronto-midventral rows, 22-31 left and 35-54 right marginal cirri, but no caudal cirri, invariably 3 dorsal kineties, of which kineties 1 and 3 link together anteriorly, 24-70 ma...
Source: European Journal of Protistology - April 3, 2009 Category: Microbiology Authors: Hu X, Fan X, Lin X, Gong J, Song W Tags: Eur J Protistol Source Type: journals

Marinamoeba thermophila, a new marine heterolobosean amoeba growing at 50 degrees C.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Two amoeba strains were isolated from marine sediment taken at the same place with 18 months interval from a region of the sea floor heated by extended submarine hot springs and fumaroles. These thermophilic amoebae grow at temperatures up to 50 degrees C. Sequences of the internal transcribed spacer demonstrated that the two strains belong to the same species and are different from any genus for which sequences are known. Phylogeny using small subunit ribosomal RNA places the amoeba in the Heterolobosea. Their closest relatives are the hypersaline flagellate Pleurostomum flabellatum and the hypersaline amoeba Tulamoeb...
Source: European Journal of Protistology - March 30, 2009 Category: Microbiology Authors: De Jonckheere JF, Baumgartner M, Opperdoes FR, Stetter KO Tags: Eur J Protistol Source Type: journals

Morphology and ciliary pattern of some rare haptorid ciliates, with a description of the new family Kamburophryidae (Protists, Haptoria).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We investigated three rare haptorid ciliates, viz., Lagynophrya gibba Kahl (1935), Enchelys lajacola nov. spec., and Spathidium implicatum Kahl (1930), using live observation, silver impregnation, morphometry, and scanning electron microscopy. Lagynophrya gibba, which was rediscovered in peatland soil from Iceland, is referred to a new genus, Kamburophrys, and a new family, Kamburophryidae, based on a unique organelle, the brush membranoid. This structure is near the dorsal brush and composed of very narrowly spaced cilia, about 5mum long. The genus Kamburophrys has a unique combination of features, viz., an oral cone ...
Source: European Journal of Protistology - March 16, 2009 Category: Microbiology Authors: Foissner W, Oertel A Tags: Eur J Protistol Source Type: journals

Structure and seasonal dynamics of the protozoan community (heterotrophic flagellates, ciliates, amoeboid protozoa) in the plankton of a large river (River Danube, Hungary).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Seasonal dynamics of all major protozoan groups were investigated in the plankton of the River Danube, upstream of Budapest (Hungary), by bi-weekly sampling over a 1-year long period. Sixty-one heterotrophic flagellate, 14 naked amoeba, 50 testate amoeba, 4 heliozoan and 83 ciliate morphospecies were identified. The estimated abundance ranges of major groups throughout the year were as follows: heterotrophic flagellates, 0.27-7.8x10(6)ind.l(-1); naked amoebae, max. 3300ind.l(-1); testaceans, max. 1600ind.l(-1); heliozoans, max. 8500ind.l(-1); ciliates, 132-34,000ind.l(-1). In terms of biovolume, heterotrophic flagellat...
Source: European Journal of Protistology - March 11, 2009 Category: Microbiology Authors: Kiss AK, Acs E, Kiss KT, Török JK Tags: Eur J Protistol Source Type: journals

A redescription of the marine hypotrichous ciliate, Nothoholosticha fasciola (Kahl, 1932) nov. gen., nov. comb. (Ciliophora: Urostylida) with brief notes on its cellular reorganization and SS rRNA gene sequence.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology and infraciliature of the marine hypotrichous ciliate Nothoholosticha fasciola (Kahl, 1932) nov. gen., nov. comb., isolated from mariculture waters near Qingdao, China, are redescribed based on live and protargol-impregnated specimens. Features reported for the first time include the possession of more than 50 macronuclear nodules and details of the infraciliature, i.e. 50-60 adoral membranelles, shortened paroral and endoral membranes, six frontal, one buccal and two to seven transverse cirri, ca. 40 pairs of midventral cirri, ca. 60-120 left and 70-120 right marginal cirri, three dorsal kineties, cauda...
Source: European Journal of Protistology - March 9, 2009 Category: Microbiology Authors: Li L, Zhang Q, Hu X, Warren A, Al-Rasheid KA, Al-Khedheiry AA, Song W Tags: Eur J Protistol Source Type: journals

Redescription and neotypification of a poorly known freshwater ectocommensal ciliate, Larvulina variabilis (), and consideration of its systematic position.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology and infraciliature of Larvulina variabilis collected from freshwater Gammarus near Boise, Idaho (USA) were investigated using live observation and silver impregnation. Larvulina variabilis was collected from three sites in Idaho and one site in Michigan, indicating a wide distribution. Larvulina variabilis is a small (21-25x14-19mum in vivo) hymenostome ectocommensal on freshwater amphipods. Distinguishing morphologic features include an inflexible cortex with a prominent notch in the left posterior margin, a single globular macronucleus, a single posterior contractile vacuole, a somatic ciliature with 1...
Source: European Journal of Protistology - March 3, 2009 Category: Microbiology Authors: Bourland WA Tags: Eur J Protistol Source Type: journals

A case-building Spirostomum (Ciliophora, Heterotrichida) with zoochlorellae.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A 1mm-long Spirostomum with symbiotic chlorellae has been found in the oxygen-depleted sediment of a shallow fen pond in the South of England (UK). The ciliate lives amongst sediment debris, where it builds a lorica that covers about half the length of the ciliate. It is common to find several of the green Spirostomum cells sharing the same patch of sediment particles. PMID: 19264465 [PubMed - as supplied by publisher] (Source: European Journal of Protistology)
Source: European Journal of Protistology - March 3, 2009 Category: Microbiology Authors: Esteban GF, Bradley MW, Finlay BJ Tags: Eur J Protistol Source Type: journals

A re-description of the ciliate genus and type species, Balantidium entozoon.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Members of the ciliate genus Balantidium possess a specialized "Villeneuve-Brachon's" field of somatic cilia to the right of the vestibule, or in a dextroral location. Specimens of the type species were collected in Italy and fixed for study by light microscopy, and scanning and transmission electron microscopy. The presence of the field in the type species and several other species of the genus indicates a need to re-describe the genus by including details of the ultrastructure of that field. Scanning electron microscopy shows that the field consists of one row of relatively short cilia of uniform length flanked on ea...
Source: European Journal of Protistology - February 27, 2009 Category: Microbiology Authors: Grim JN, Buonanno F Tags: Eur J Protistol Source Type: journals

A multivariate statistical evaluation of the "acolla-complex" of Corythionella species, including a description of C. darwini n. sp. (Rhizopoda: Filosea or Rhizaria: Cercozoa).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The testate amoebid genus Corythionella inhabits beach sands and includes three marine and two freshwater species of the "acolla-complex", all characterized by a poorly developed flared collar surrounding the pseudostomal aperture. Multivariate statistical methods (cluster analysis, principal coordinates analysis, non-metric multidimensional scaling ordination and discriminant analyses) were applied to morphologic characters of the test (shell) of the members of this complex in order to visualize and assess the degree of similarity among them. Graphical displays of the results of these analyses clearly revealed distinc...
Source: European Journal of Protistology - February 9, 2009 Category: Microbiology Authors: Nicholls KH Tags: Eur J Protistol Source Type: journals

Fine structure of Chloromyxum menticirrhi n. sp. (Myxozoa) infecting the urinary bladder of the marine teleost Menticirrhus americanus (Sciaenidae) in Southern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A myxosporidian was found in the urinary bladder of the teleost Menticirrhus americanus Linnaeus, 1758 (Sciaenidae) collected from the South Atlantic coast of Brazil. Polysporic amoeboid plasmodia containing sporoblasts, developing pansporoblasts and spores were free in the bladder lumen. The prevalence of infection was 17.64% (15/85). Unfixed spores were spherical to subspherical, on average 10.5mum long, 9.8mum wide and 10.1mum thick (n=25), and fixed spores measured 10.1x9.5x9.7mum. The two spore valves were of equal size and each possessed prominent sutural lines and about 41 (37-45) surface ridges aligned parallel...
Source: European Journal of Protistology - February 9, 2009 Category: Microbiology Authors: Casal G, Garcia P, Matos P, Monteiro E, Matos E, Azevedo C Tags: Eur J Protistol Source Type: journals

Nuclearia thermophila sp. nov. (Nucleariidae), a new nucleariid species isolated from Yunoko Lake in Nikko (Japan).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new species of unicellular opisthokont protist, Nuclearia thermophila sp. nov., was isolated from the warm spring water of Yunoko Lake, Japan, and has been described using light and electron microscopy. It exists as a spherical floating form and a flattened amoeboid form showing various shapes. The cells occasionally extended as branches or knobbed filopodia. The spherical form when suspended in medium measured 20-40mum in diameter (excluding filopodia). The amoeboid form may exceed 65mum along the longest axis. A nucleus with an obvious spherical nucleolus, dictyosomes, mitochondria with flat cristae, food vacuoles,...
Source: European Journal of Protistology - January 19, 2009 Category: Microbiology Authors: Yoshida M, Nakayama T, Inouye I Tags: Eur J Protistol Source Type: journals

Evaluation of the efficiency of metabolism of dinoflagellate phosphorus and carbon by a planktonic ciliate.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, a sensitive dual-radioactive tracer technique was developed to simultaneously assess the ingestion rate, and carbon- and phosphorus-specific assimilation efficiencies, of the marine planktonic ciliate Strobilidium neptuni feeding on the autotrophic dinoflagellate Heterocapsa triquetra. Dinoflagellate prey were simultaneously 16h pulse labelled with NaH(14)CO(3) and H(3)(33)PO(4) before being fed to the ciliate, and radioactive labels were traced into ciliate biomass and the experimental medium, as well as being monitored in the prey cells. Rates measured in short-term (10min) incubations, as commonly used to...
Source: European Journal of Protistology - January 18, 2009 Category: Microbiology Authors: Zubkov MV, Leakey RJ Tags: Eur J Protistol Source Type: journals

Morphology and ontogenesis of Platyophrya bromelicola nov. spec., a new macrostome-forming colpodid (Protists, Ciliophora) from tank bromeliads of Jamaica.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Platyophrya bromelicola nov. spec. was discovered in tanks of bromeliads from Jamaica. Its morphology, ontogenesis, and small-subunit rDNA were studied using standard methods. Platyophrya bromelicola differs from its congeners mainly by the pyriform, unflattened body (vs. reniform and flattened); the free-swimming (planktonic) habit (vs. biofilm creepers); and the unique ability to form two distinct morphs, i.e., small, bacteriophagous microstomes and large, predaceous macrostomes. Microstomes and macrostomes can be distinguished not only by body size and feeding preferences but also by the postoral pseudomembrane comp...
Source: European Journal of Protistology - December 15, 2008 Category: Microbiology Authors: Foissner W, Wolf KW Tags: Eur J Protistol Source Type: journals

Gravitaxis of Bursaria truncatella: Electrophysiological and behavioural analyses of a large ciliate cell.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Bursaria truncatella is a giant ciliate. Its volume of 3x10(7)mum(3) and a sedimentation rate of 923mums(-1) would induce the cell to rapidly sink to the bottom of a pond unless compensating mechanisms exist. The upward swimming behaviour of a cell population (negative gravitaxis) may be either a result of reorientations of the cells (graviorientation) and/or direction-dependent changes in propulsion rate (gravikinesis). The special statocyst hypothesis assumes a stimulation of mechanosensitive ion channels by forces of the cytoplasmic mass acting on the lower membrane. Here, we present basic electrophysiological data ...
Source: European Journal of Protistology - December 12, 2008 Category: Microbiology Authors: Krause M, Bräucker R Tags: Eur J Protistol Source Type: journals

Descriptions of two new marine scuticociliates, Pleuronema sinica n. sp. and P. wilberti n. sp. (Ciliophora: Scuticociliatida), from the Yellow Sea, China.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Two new marine scuticociliates, Pleuronema sinica n. sp. and P. wilberti n. sp., collected from the sand beach of Qingdao, China, were investigated in vivo and following protargol impregnation. Ciliates of the genus Pleuronema are normally recognizable by their large sail-like paroral membrane although one species, P. grolierei, has shorter cilia in the paroral membrane. Neither of the new forms has the conspicuous paroral membrane in vivo so in this respect they are not typical members of this genus. Pleuronema sinica is characterized by its large, conspicuously flattened body, the possession of only one preoral kinet...
Source: European Journal of Protistology - November 11, 2008 Category: Microbiology Authors: Wang Y, Song W, Warren A, Al-Rasheid KA, Al-Quraishy SA, Al-Farraj SA, Hu X, Pan H Tags: Eur J Protistol Source Type: journals

Colonization dynamics of biofilm-associated ciliate morphotypes at different flow velocities.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The impact of flow velocity on initial ciliate colonization dynamics on surfaces were studied in the third order Ilm stream (Thuringia, Germany) at a slow flowing site (0.09ms(-1)) and two faster flowing sites (0.31ms(-1)) and in flow channels at 0.05, 0.4, and 0.8ms(-1). At the slow flowing stream site, surfaces were rapidly colonized by ciliates with up to 60 cellscm(-2) after 24h. In flow channels, the majority of suspended ciliates and inorganic matter accumulated at the surface within 4.5h at 0.05ms(-1). At 0.4ms(-1) the increase in ciliate abundance in the biofilm was highest between 72 and 168h at about 3 cellsc...
Source: European Journal of Protistology - November 10, 2008 Category: Microbiology Authors: Risse-Buhl U, Küsel K Tags: Eur J Protistol Source Type: journals

Rumen ciliates from Tanzanian short horn zebu cattle, Bos taurus indicus, and the infraciliature of Entodinium palmare n.sp. and Enoploplastron stokyi ().Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Rumen ciliates of ten Tanzanian short horn zebu cattle were examined. A total of 15 genera and 46 species were identified, including a new Entodinium species. The ciliate density was 22.2x10(4)ml(-1). The number of species per host and the diversity index showed high values, 33.8 and 2.80, respectively. Rumen ciliates had a low percentage composition of the genus Entodinium (7.0-25.0%) and a slightly higher percentage composition of the genera, Eudiplodinium (19.3%), Diplodinium (14.1%), and Ostracodinium (13.1%). Entodinium palmare n.sp., Eudiplodinium kenyensis, and Enoploplastron stokyi were found in all cattle exam...
Source: European Journal of Protistology - November 10, 2008 Category: Microbiology Authors: Mishima T, Katamoto H, Horii Y, Kakengi VA, Ito A Tags: Eur J Protistol Source Type: journals

The morphology, morphogenesis and SSrRNA gene sequence of a new marine ciliate, Diophrys apoligothrix spec. nov. (Ciliophora; Euplotida).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology, morphogenesis and small subunit rRNA (SSrRNA) gene sequence of a new marine euplotid ciliate, Diophrys apoligothrix spec. nov., isolated from a sandy beach near Qingdao, north China, were investigated. This organism is characterized as follows: rigid body with a sculptured surface; size in vivo about 60-110x40-70mum; adoral zone comprising about 28 membranelles; five frontal, two ventral, five transverse, one left marginal and three caudal cirri; five dorsal kineties with sparsely distributed dikinetids; two ellipsoid macronuclear nodules; marine habitat. Although the main morphogenetic events are simil...
Source: European Journal of Protistology - November 10, 2008 Category: Microbiology Authors: Song W, Shao C, Yi Z, Li L, Warren A, Al-Rasheid K, Yang J Tags: Eur J Protistol Source Type: journals

A description of Apocarchesium rosettum n. gen., n. sp. and a redescription of Ophrydium eichornii, two freshwater peritrichous ciliates from Japan.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This paper includes the proposal of a new genus for a new species of peritrichous ciliate, Apocarchesium rosettum n. gen., n. sp., as well as the first description by modern techniques of another peritrich, Ophrydium eichornii Ehrenberg, 1838. The genus Apocarchesium is separated from the related genus Carchesium by the appearance of the stalk and the arrangement of zooids, and diagnosed as follows: colonial vorticellid, with all zooids attached in rosette fashion to the tip of their common stalk, which is unbranched and contracts spirally; pellicle with parallel silverlines. The morphology, infraciliature, and silverl...
Source: European Journal of Protistology - October 15, 2008 Category: Microbiology Authors: Ji D, Kusuoka Y Tags: Eur J Protistol Source Type: journals

Conjugation in the spirotrich ciliate Halteria grandinella (Müller, 1773) Dujardin, 1841 (Protozoa, Ciliophora) and its phylogenetic implications.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conjugation in the spirotrich ciliate Halteria grandinella (Müller, 1773) Dujardin, 1841 (Protozoa, Ciliophora) and its phylogenetic implications. Eur J Protistol. 2008 Oct 15; Authors: Agatha S, Foissner W The conjugation of Halteria grandinella was studied in protargol preparations. The isogamontic conjugants fuse partially with their ventral sides to a homopolar pair. The first maturation division generates dramatic transformations: (i) the partners obtain an interlocking arrangement; (ii) the number of bristle kineties decreases from seven to four in each partner; and (iii) the right conjugant loses it...
Source: European Journal of Protistology - October 15, 2008 Category: Microbiology Authors: Agatha S, Foissner W Tags: Eur J Protistol Source Type: journals

Rumen protozoal diversity in the Spanish ibex (Capra pyrenaica hispanica) as compared with domestic goats (Capra hircus).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Rumen protozoal diversity in the Spanish ibex (SI) was studied in males (n=4), females (n=7) and young (n=4) from the Maestrazgo (Spain) and contrasted with domestic goats (n=3; DG) of the same region. There were no differences among SI types in protozoal concentration or in the number of protozoal species. Only protozoa from the genus Entodinium were observed in SI (seven species), the highest numbers corresponding to E. damae, E. ovibos and E. parvum. DG harboured threefold more species than SI. Nine to 10 Entodinium spp. were observed, but E. ovibos was absent from the rumen of DG, and E. damae was in only one anima...
Source: European Journal of Protistology - October 15, 2008 Category: Microbiology Authors: de la Fuente G, Belanche A, Abecia L, Dehority BA, Fondevila M Tags: Eur J Protistol Source Type: journals

Morphology and molecular phylogeny of Haplozoon praxillellae n. sp. (Dinoflagellata): A novel intestinal parasite of the maldanid polychaete Praxillella pacifica Berkeley.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we describe Haplozoon praxillellae n. sp. from the intestine of the Pacific maldanid polychaete Praxillella pacifica Berkeley. The parasites are relatively small, oblong and about 35-125mum in length, consisting of the trophocyte (anterior-most compartment), rectangular gonocytes and bulbous sporocytes. The trophocyte bears an attachment apparatus with a prominent 'suction disc' and numerous stylets. We were able to detect spherical vesicles near the ventral surface of each gonocyte. The whole organism is covered with thecal barbs of different shape and size, except for the caudal end of the posterior-most s...
Source: European Journal of Protistology - July 24, 2008 Category: Microbiology Authors: Rueckert S, Leander BS Tags: Eur J Protistol Source Type: journals

Pankovaia semitubulata gen. et sp. n. (Microsporidia: Tuzetiidae) from nymphs of mayflies Cloeon dipterum L. (Insecta: Ephemeroptera) in Western Siberia.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The ultrastructure of a new microsporidian, Pankovaia semitubulata gen. et sp. n. (Microsporidia: Tuzetiidae), from the fat body of Cloeon dipterum (L.) (Ephemeroptera: Baetidae) is described. The species is monokaryotic throughout the life cycle, developing in direct contact with the host cell cytoplasm. Sporogonial plasmodium divides into 2-8 sporoblasts. Each sporoblast, then spore, is enclosed in an individual sporophorous vesicle. Fixed and stained spores of the type species P. semitubulata are 3.4x1.9mum in size. The polaroplast is bipartite (lamellar and vesicular). The polar filament is isofilar, possessing 6 c...
Source: European Journal of Protistology - July 21, 2008 Category: Microbiology Authors: Simakova AV, Tokarev YS, Issi IV Tags: Eur J Protistol Source Type: journals

Living together: The marine amoeba Thecamoeba hilla Schaeffer, 1926 and its endosymbiont Labyrinthula sp.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Two protists isolated simultaneously from the same sample of gill tissue of Psetta maxima (L.) were identified as Thecamoeba hilla Schaeffer, 1926 and Labyrinthula sp. A Labyrinthula strain (LTH) derived from a mixed culture of both organisms was well established in a short time, while subcultures of T. hilla continued to be associated with Labyrinthula cells despite all efforts to eliminate them. Ultrastructural examination, repeated several times in the course of long-lasting subculturing of amoebae, revealed that trophozoites of T. hilla host in their cytoplasm multiplying labyrinthulid cells. Comparison of SSU rDNA...
Source: European Journal of Protistology - July 9, 2008 Category: Microbiology Authors: Dyková I, Fiala I, Dvořáková H, Pecková H Tags: Eur J Protistol Source Type: journals

Fragilidium duplocampanaeforme sp. nov. (Dinophyceae): A new phagotrophic dinoflagellate from the French Atlantic coast.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new species of the genus Fragilidium, F. duplocampanaeforme sp. nov., is described from examinations by LM and SEM. This species has been recorded in summer on the French Atlantic coast, over a number of years. It was never abundant in the plankton and was very often associated with Fragilidium subglobosum, Pyrophacus horologium and also with toxigenic species of the genera Alexandrium and Dinophysis. Phagotrophy of F. duplocampanaeforme on Dinophysis prey is shown, and sexual reproduction is suggested by the observation of gamete-like small forms. The size and the peculiar shape of its cells do not correspond to any...
Source: European Journal of Protistology - July 8, 2008 Category: Microbiology Authors: Nézan E, Chomérat N Tags: Eur J Protistol Source Type: journals

Erythropsidinium (Gymnodiniales, Dinophyceae) in the Pacific Ocean, a unique dinoflagellate with an ocelloid and a piston.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The distribution and morphology of the dinoflagellate Erythropsidinium (=Erythropsis) was studied in the vicinity of the Kuroshio and Oyashio Currents, the Philippine, Celebes, Sulu and South China Seas, western and central equatorial and southeast Pacific Ocean. Ninety-four specimens were observed, most of them collected from depths of less than 90m. The highest abundance (15cellsL(-1)) was recorded in the north Philippine Sea in May (32 degrees N, 138 degrees E, 30-m depth). Twenty-four specimens were found in a station in the offshore Perú-Chile Current (31 degrees 52'S, 91 degrees 24'W). The transition regions...
Source: European Journal of Protistology - June 10, 2008 Category: Microbiology Authors: Gómez F Tags: Eur J Protistol Source Type: journals

Differentially expressed genes during the encystment-excystment cycle of the ciliate Sterkiella histriomuscorum.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Under unfavourable environmental conditions, many ciliates transform into resting cysts through a developmental process called encystment. Excystment is the reverse transformation of the resting cyst into a vegetative cell when favourable conditions are restored. In the oxytrichid Sterkiella histriomuscorum, the encystment - excystment (E-E) cycle involves extensive morphological changes since the whole cytoskeleton is disassembled during encystment. Assuming that these changes in cellular organization may be significantly reflected in the gene expression pattern, we used a "DNA macroarray" strategy to measure the tran...
Source: European Journal of Protistology - June 10, 2008 Category: Microbiology Authors: Grisvard J, Lemullois M, Morin L, Baroin-Tourancheau A Tags: Eur J Protistol Source Type: journals

Pentagonia zhangduensis nov. spec. (Lobosea, Arcellinida), a new freshwater species from China.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology of a new testate amoeba Pentagonia zhangduensis nov. spec. was investigated using light and scanning electron microscopy. The new species was discovered in the sediments of Lake Zhangdu, Hubei Province, China. The low coefficients of variation and normal size frequency distribution suggest that P. zhangduensis is a size-monomorphic species. P. zhangduensis differs from the one other species in this genus (P. maroccana), by its larger size and its quadrangular cross section with two parallel longitudinal ridges on each of the two flattened sides of the test. PMID: 18547792 [PubMed - as supplied by pub...
Source: European Journal of Protistology - June 9, 2008 Category: Microbiology Authors: Qin Y, Xie S, Swindles GT, Gu Y, Zhou X Tags: Eur J Protistol Source Type: journals

Cell size and dorsal cilia: Are they useful features for the identification of Stylonychia mytilus (Ciliophora, Spirotrichea) and its subpopulations?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
It was investigated whether (1) the number of cilia of the dorsal kineties 3 and 4 and (2) the cell length are species-specific characters which can be used to distinguish the sibling species S. mytilus and S. lemnae. The number of cilia of the dorsal kineties 3 and 4 is a relatively constant, reliable species-specific character in all investigated strains of both species and rather independent from the origin and the nutritional condition of the cells. The cell length is also a reliable species character, if strains of both species from Germany are compared (under identical nutritional conditions). However, all S. myt...
Source: European Journal of Protistology - June 4, 2008 Category: Microbiology Authors: Ammermann D Tags: Eur J Protistol Source Type: journals

Phylogeny of some systematically uncertain urostyloids -Apokeronopsis, Metaurostylopsis, Thigmokeronopsis (Ciliophora, Stichotrichia) estimated with small subunit rRNA gene sequence information: Discrepancies and agreements with morphological data.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The small subunit rRNA (SSrRNA) genes of seven species of urostyloids representing four genera were sequenced. These were: Apokeronopsis crassa, A. bergeri, Anteholosticha sp-QD-1, Metaurostylopsis sp-QD-1, M. sp-QD-2, M. sp-QD-3 and Thigmokeronopsis sp-QD-1. Gene trees were constructed in order to investigate their phylogenetic relationships. The results indicate that: (1) Apokeronopsis, Thigmokeronopsis and Metaurostylopsis form a well-supported, clearly isolated, monophyletic group; (2) Metaurostylopsis species analysed consistently group together indicating that it is a well-outlined genus; (3) the validity of the ...
Source: European Journal of Protistology - June 4, 2008 Category: Microbiology Authors: Yi Z, Song W, Shao C, Warren A, Al-Rasheid KA, Roberts DM, Miao M, Al-Quraishy SA, Chen Z Tags: Eur J Protistol Source Type: journals

A new choanoflagellate species from Taiwan: Morphological and molecular biological studies of Diplotheca elongata nov. spec. and D. costata.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new species of acanthoecid choanoflagellate isolated from brackish waters of the Danshui estuary in North Taiwan has a mineralized lorica that consists of two chambers with a total length of 19-36mum. It shares with Diplotheca costata the features of a posterior lorica chamber formed from broad and flattened costal strips and an anterior chamber with spatula-shaped costal strips. The new species has therefore been placed in the same genus and named Diplotheca elongata. A phylogenetic analysis of partial SSU rDNA sequences from Diplotheca costata and D. elongata supports this taxonomic affiliation. This is a large and...
Source: European Journal of Protistology - April 14, 2008 Category: Microbiology Authors: Nitsche F, Arndt H Tags: Eur J Protistol Source Type: journals

Morphology and morphogenesis of a new marine ciliate, Apokeronopsis bergeri nov. spec. (Ciliophora, Hypotrichida), from the Yellow Sea, China.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The morphology and morphogenesis of a new marine hypotrich ciliate, Apokeronopsis bergeri nov. spec., collected from mussel-farming waters near Qingdao, China, are described from living and protargol-impregnated specimens. This ciliate has characteristics that place it in the family Pseudokeronopsidae, namely, two long rows of frontal cirri (bicorona), which are continuous with the long midventral rows, and a single row of marginal cirri on each side of the body. It shares with its only congener, Apokeronopsis crassa, the long rows of buccal and transverse cirri and the wide spacing between the midventral rows of cirri...
Source: European Journal of Protistology - April 14, 2008 Category: Microbiology Authors: Li L, Song W, Warren A, Al-Rasheid KA, Roberts D, Yi Z, Al-Farraj SA, Hu X Tags: Eur J Protistol Source Type: journals

A new genus, Helgoeca gen. nov., for a nudiform choanoflagellate.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new genus, Helgoeca gen. nov., has been designated to accommodate a nudiform loricate choanoflagellate (American Type Culture Collection strain ATCC 50073) that was incorrectly attributed to the tectiform genus Acanthoecopsis (=Acanthocorbis). The first indication that this species might be nudiform came from a four-gene phylogeny of the choanoflagellates which recovered ATCC 50073 within a strongly supported monophyletic clade comprising two other nudiform taxa. Fortunately an isolate of the species in question was available from the ATCC and when observed in rapidly growing culture it was immediately apparent that ...
Source: European Journal of Protistology - April 8, 2008 Category: Microbiology Authors: Leadbeater BS, Hassan R, Nelson M, Carr M, Baldauf SL Tags: Eur J Protistol Source Type: journals

Ultrastructure and molecular phylogeny of Stephanopogon minuta: An enigmatic microeukaryote from marine interstitial environments.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Although Stephanopogon was described as a putative ciliate more than a century ago, its phylogenetic position within eukaryotes has remained unclear because of an unusual combination of morphological characteristics (e.g. a highly multiflagellated cell with discoidal mitochondrial cristae). Attempts to classify Stephanopogon have included placement with the Ciliophora, the Euglenozoa, the Heterolobosea and the Rhizaria. Most systematists have chosen, instead, to conservatively classify Stephanopogon as incertae sedis within eukaryotes. Despite the obvious utility of molecular phylogenetic data in resolving this issue, ...
Source: European Journal of Protistology - April 8, 2008 Category: Microbiology Authors: Yubuki N, Leander BS Tags: Eur J Protistol Source Type: journals

Neoparamoeba spp. and their eukaryotic endosymbionts similar to Perkinsela amoebae (Hollande, 1980): Coevolution demonstrated by SSU rRNA gene phylogenies.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The molecular phylogeny of Neoparamoeba spp. based on SSU rDNA was updated by including new sequences of strains isolated from an invertebrate and an alga. In total, 59 sequences of strains representating N. pemaquidensis, N. branchiphila, N. aestuarina and N. perurans were analysed. Sequences of SSU rDNA of eukaryotic endosymbionts (Perkinsela amoebae-like organisms) were prepared from 34 samples of genomic DNA of strain-representatives of N. pemaquidensis, N. branchiphila and N. aestuarina. Comparison of phylograms reconstructed from corresponding SSU rDNA sequences of host amoebae and their symbionts revealed a high...
Source: European Journal of Protistology - April 5, 2008 Category: Microbiology Authors: Dyková I, Fiala I, Pecková H Tags: Eur J Protistol Source Type: journals

Salinity tolerance in Hyalophysa chattoni (Ciliophora, Apostomatida), a symbiont of the estuarine grass shrimp Palaemonetes pugio.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The apostome ciliate Hyalophysa chattoni, a symbiont of the estuarine grass shrimp Palaemonetes pugio, was tested for its growth and reproductive ability in a wide range of salinities from 0.1 to 55ppt. Shrimp, with their attached ciliates, were slowly acclimated to different salinities in order to assess protozoan cell size and division. The trophont and tomont stages of the ciliate life cycle were analyzed. In both stages, cell size increased with salinity from 0.1 to 20ppt. Cell size leveled in the 20-35ppt range, and decreased at higher salinities. The number of daughter cells produced per tomont cyst correlated wi...
Source: European Journal of Protistology - April 2, 2008 Category: Microbiology Authors: Pisani KA, Landers SC, Pappanastos E Tags: Eur J Protistol Source Type: journals

Morphological analysis of the cellular interactions between the eugregarine Gregarina garnhami (Apicomplexa) and the epithelium of its host, the desert locust Schistocerca gregaria.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Morphological features of the eugregarine Gregarina garnhami (Canning, 1956) parasitic in the caeca and mid-gut of the desert locust, Schistocerca gregaria, have been studied by transmission and scanning electron microscopy, with particular attention to the epimerite and the relationship between the epimerite and the host epithelium. The cytoplasmic core of the globular epimerite is overlain by a distinct cortical zone, limited on its cytoplasmic face by a membrane-like structure, with an underlying layer of mitochondria. The periphery of the cortical zone is strengthened by a mass of fine filaments, especially at its ...
Source: European Journal of Protistology - February 25, 2008 Category: Microbiology Authors: Valigurová A, Koudela B Tags: Eur J Protistol Source Type: journals

Redescription of Cardiosporidium cionae (Van Gaver and Stephan, 1907) (Apicomplexa: Piroplasmida), a plasmodial parasite of ascidian haemocytes.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Cardiosporidium cionae (Apicomplexa), from the ascidian Ciona intestinalis L., is redescribed with novel ultrastructural, phylogenetic and prevalence data. Ultrastructural analysis of specimens of C. intestinalis collected from the Gulf of Naples showed sporonts and plasmodia of C. cionae within the host pericardial body. Several merogonic stages and free merozoites were found in the pericardial body, together with sexual stages. All stages showed typical apicomplexan cell organelles, i.e. apicoplasts, rhoptries and subpellicular microtubules. Merogonic stages of C. cionae were also produced inside haemocytes. A fragme...
Source: European Journal of Protistology - February 25, 2008 Category: Microbiology Authors: Ciancio A, Scippa S, Finetti-Sialer M, De Candia A, Avallone B, De Vincentiis M Tags: Eur J Protistol Source Type: journals

The bacterivorous ciliate Cyclidium glaucoma isolated from a sewage treatment plant: Molecular and cytological descriptions for barcoding.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A strain of Cyclidium isolated from a sewage treatment plant in Geneva, Switzerland, was cloned and cultured under laboratory conditions before being characterized cytologically and molecularly. Information about the classical morphology and also about new molecular sequences has been obtained permitting its identification as Cyclidium glaucoma. The molecular description includes the 18S rRNA sequence, and for the first time for C. glaucoma the ITS-1, 5.8S, ITS-2 sequence, and the mitochondrial Cytochrome oxidase C subunit 1 sequence. Three divergence groups were identified for C. glaucoma using a short rDNA sequence f...
Source: European Journal of Protistology - February 25, 2008 Category: Microbiology Authors: Guggiari M, Peck R Tags: Eur J Protistol Source Type: journals