Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-1-5
S. Fokin
A commonly encountered problem of ignoring or inattentive reading of scientific articles by some protistologists of the past and present has been revealed using the case study of taxonomy of the ciliate genus Frontonia. The comparison between materials from literature and own investigations allowed the author to conclude that F. vernalis Ehrenberg, 1833 cannot to be a valid species and assume that it is rather a cluster of closely related freshwater ciliates with one contractile vacuole and a stable ability to accommodate green algae as the cytoplasmic symbionts. “F. vernalis”, as described by Bullington (1939), was shown to have little in common with the original description by Ehrenberg and most likely is a brackishwater ciliate similar to F. fusca. F. oculiaris described by the same author (Bullington, 1939) is obviously F. fusca, and the name “F. oculiaris” should be considered as a younger synonym of the latter. Thus, redescription of F. oculiaris (Pan et al., 2013b) should be treated just as a morphological study of the local Chinese population of F. fusca. The redescription of F. canadensis from brackish waters by the same authors can be considered as a description of a new species that has little in common with the original description of this freshwater ciliate (Roque and Puytorac, 1972). Recent phylogenetical reconstructions indicate the necessity to split Frontonia into several genera.
{"title":"On the importance of attentive reading of research articles: the case study of Frontonia (Peniculia, Oligohymenophora, Ciliophora) species descriptions and redescriptions","authors":"S. Fokin","doi":"10.21685/1680-0826-2019-13-1-5","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-1-5","url":null,"abstract":"A commonly encountered problem of ignoring or inattentive reading of scientific articles by some protistologists of the past and present has been revealed using the case study of taxonomy of the ciliate genus Frontonia. The comparison between materials from literature and own investigations allowed the author to conclude that F. vernalis Ehrenberg, 1833 cannot to be a valid species and assume that it is rather a cluster of closely related freshwater ciliates with one contractile vacuole and a stable ability to accommodate green algae as the cytoplasmic symbionts. “F. vernalis”, as described by Bullington (1939), was shown to have little in common with the original description by Ehrenberg and most likely is a brackishwater ciliate similar to F. fusca. F. oculiaris described by the same author (Bullington, 1939) is obviously F. fusca, and the name “F. oculiaris” should be considered as a younger synonym of the latter. Thus, redescription of F. oculiaris (Pan et al., 2013b) should be treated just as a morphological study of the local Chinese population of F. fusca. The redescription of F. canadensis from brackish waters by the same authors can be considered as a description of a new species that has little in common with the original description of this freshwater ciliate (Roque and Puytorac, 1972). Recent phylogenetical reconstructions indicate the necessity to split Frontonia into several genera.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67885762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-2-4
Furkan Durucan, L. Artüz, I. Dovgal
This study presents the data on the new finding of suctorian ciliate Paracineta irregularis on halacarid mite Rhombognathus sp. from the Sea of Marmara, Turkey. Diagnostic characters of P. irregularis such as contractility of tentacles and position of macronucleus are emended based on the material collected from the new locality. The mode of the species reproduction by semi-circumvaginative exogemmic budding is described for the first time.
{"title":"The first record of Paracineta irregularis (Ciliophora, Suctorea) as epibiont on Rhombognathus halacarid mite (Acari, Halacaridae) from the Sea of Marmara, Turkey","authors":"Furkan Durucan, L. Artüz, I. Dovgal","doi":"10.21685/1680-0826-2019-13-2-4","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-2-4","url":null,"abstract":"This study presents the data on the new finding of suctorian ciliate Paracineta irregularis on halacarid mite Rhombognathus sp. from the Sea of Marmara, Turkey. Diagnostic characters of P. irregularis such as contractility of tentacles and position of macronucleus are emended based on the material collected from the new locality. The mode of the species reproduction by semi-circumvaginative exogemmic budding is described for the first time.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67886543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-2-2
M. Berdieva, P. Safonov, O. Matantseva
The stressor-induced ecdysis takes a special place in dinoflagellate biology. During ecdysis, a cell loses the plasmalemma, outer amphiesmal vesicle membrane and, in armored species, thecal plates, becomes immotile, and then amphiesma regeneration occurs. Here we report the results of our study of cell covering rearrangement during ecdysis in the naked dinoflagellate species Amphidinium carterae Hulburt 1957. Ecdysis was induced by mechanical treatment (centrifugation). The changes in cell organization at the ultrastructural level were examined using transmission electron microscopy methods. Shedding of the plasma membrane and the outer amphiesmal vesicle membranes, fusion of the inner amphiesmal vesicle membranes were observed. The amorphous cytoplasm zone, which underlies inner amphiesmal vesicle membranes in motile cells, retains under the new plasma membrane in ecdysed cells. We showed accumulation of small vesicles and flattened tubules that apparently begin fusion to form juvenile amphiesmal vesicles in this zone. The absence of pellicle in Amphidinium dinoflagellates was suggested.
{"title":"Ultrastructural aspects of ecdysis in the naked dinoflagellate Amphidinium carterae","authors":"M. Berdieva, P. Safonov, O. Matantseva","doi":"10.21685/1680-0826-2019-13-2-2","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-2-2","url":null,"abstract":"The stressor-induced ecdysis takes a special place in dinoflagellate biology. During ecdysis, a cell loses the plasmalemma, outer amphiesmal vesicle membrane and, in armored species, thecal plates, becomes immotile, and then amphiesma regeneration occurs. Here we report the results of our study of cell covering rearrangement during ecdysis in the naked dinoflagellate species Amphidinium carterae Hulburt 1957. Ecdysis was induced by mechanical treatment (centrifugation). The changes in cell organization at the ultrastructural level were examined using transmission electron microscopy methods. Shedding of the plasma membrane and the outer amphiesmal vesicle membranes, fusion of the inner amphiesmal vesicle membranes were observed. The amorphous cytoplasm zone, which underlies inner amphiesmal vesicle membranes in motile cells, retains under the new plasma membrane in ecdysed cells. We showed accumulation of small vesicles and flattened tubules that apparently begin fusion to form juvenile amphiesmal vesicles in this zone. The absence of pellicle in Amphidinium dinoflagellates was suggested.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67886849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-3-1
A. Khanaychenko, I. Telesh, S. Skarlato
The article reviews the up-to-date concepts of an ambiguous status of the widely spread, bloom-forming, potentially toxic mixotrophic dinoflagellates Prorocentrum cordatum in marine planktonic food webs, with special emphasis on the ecological prerequisites of their proliferation and possible scenarios underlying the development of harmful algal blooms and their top-down control in marine coastal waters.
{"title":"Bloom-forming potentially toxic dinoflagellates Prorocentrum cordatum in marine plankton food webs","authors":"A. Khanaychenko, I. Telesh, S. Skarlato","doi":"10.21685/1680-0826-2019-13-3-1","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-3-1","url":null,"abstract":"The article reviews the up-to-date concepts of an ambiguous status of the widely spread, bloom-forming, potentially toxic mixotrophic dinoflagellates Prorocentrum cordatum in marine planktonic food webs, with special emphasis on the ecological prerequisites of their proliferation and possible scenarios underlying the development of harmful algal blooms and their top-down control in marine coastal waters.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67886953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-2-3
A. Bobrov
Testate, or shell, amoebae inhabit almost all types of biotopes and have a global distribution. They are a key component of soil ecosystems and are actively involved in the biogenic cycles of carbon, nitrogen, phosphorus, silica and calcium. They play an important role in regulating the abundance of microorganisms in soils. Since late 19th century, a development of the micropaleontological method in paleoecology was known as a rhizopod analysis (Beyens and Bobrov, 2016). The shell amoebae from the genus Planhoogenraadia in the eastern part of Eurasia, namely in the Far East, were first found in 2001 (Bobrov, 2001). Later they were also found in Thailand (Todorov and Golemansky, 2014). The genus Planhoogenraadia inhabits the forest soils. The genus belongs to the Gondwana-tropic group of shell amoebae and has a limited geographical distribution (Bonnet, 1984; Bonnet and Gomez-Sanchez, 1984). This is one of the most interesting genera in protozoology in view of biogeography (Foissner, 2006; Smith et al., 2018). The soil fauna of shell amoebas of the subtropics and tropics is still poorly studied (Qin et al., 2011; Bobrov et al., 2015). This study was conducted in a mountain subtropical forest near the city of Wuhan, Hubei Province, Central China.
无壳变形虫几乎栖息在所有类型的生物群落中，并在全球范围内分布。它们是土壤生态系统的关键组成部分，积极参与碳、氮、磷、硅和钙的生物循环。它们在调节土壤中微生物的丰度方面起着重要作用。自19世纪末以来，古生态学中微古生物学方法的发展被称为根足类分析(Beyens and Bobrov, 2016)。来自欧亚大陆东部，即远东的Planhoogenraadia属的壳变形虫于2001年首次被发现(Bobrov, 2001)。后来在泰国也发现了它们(Todorov and Golemansky, 2014)。planhoogenradia属生长在森林土壤中。该属属于壳变形虫的冈瓦纳-热带类群，地理分布有限(Bonnet, 1984;邦纳和戈麦斯-桑切斯，1984)。从生物地理学的角度来看，这是原生动物学中最有趣的属之一(Foissner, 2006;Smith et al.， 2018)。对亚热带和热带地区贝壳变形虫土壤动物群的研究仍然很少(Qin et al.， 2011;Bobrov et al.， 2015)。本研究在中国中部湖北省武汉市附近的山地亚热带森林中进行。
{"title":"Planhoogenraadia liboica sp. nov. a new testate amoebae species from mountain forest soils in China","authors":"A. Bobrov","doi":"10.21685/1680-0826-2019-13-2-3","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-2-3","url":null,"abstract":"Testate, or shell, amoebae inhabit almost all types of biotopes and have a global distribution. They are a key component of soil ecosystems and are actively involved in the biogenic cycles of carbon, nitrogen, phosphorus, silica and calcium. They play an important role in regulating the abundance of microorganisms in soils. Since late 19th century, a development of the micropaleontological method in paleoecology was known as a rhizopod analysis (Beyens and Bobrov, 2016). The shell amoebae from the genus Planhoogenraadia in the eastern part of Eurasia, namely in the Far East, were first found in 2001 (Bobrov, 2001). Later they were also found in Thailand (Todorov and Golemansky, 2014). The genus Planhoogenraadia inhabits the forest soils. The genus belongs to the Gondwana-tropic group of shell amoebae and has a limited geographical distribution (Bonnet, 1984; Bonnet and Gomez-Sanchez, 1984). This is one of the most interesting genera in protozoology in view of biogeography (Foissner, 2006; Smith et al., 2018). The soil fauna of shell amoebas of the subtropics and tropics is still poorly studied (Qin et al., 2011; Bobrov et al., 2015). This study was conducted in a mountain subtropical forest near the city of Wuhan, Hubei Province, Central China.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-3-5
O. Chovgan
{"title":"Review of tintinnid species (Ciliophora: Tintinnina) from the Barents Sea","authors":"O. Chovgan","doi":"10.21685/1680-0826-2019-13-3-5","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-3-5","url":null,"abstract":"","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-3-6
M. Berdieva, S. Demin, A. Goodkov
{"title":"Amoeba proteus and ploidy cycles: from simple model to complex issues","authors":"M. Berdieva, S. Demin, A. Goodkov","doi":"10.21685/1680-0826-2019-13-3-6","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-3-6","url":null,"abstract":"","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-1-2
C. Lange, Argentina Centro de Estudios Parasitológicos y de Vectores, M. Cigliano
{"title":"Rare case of Microsporidia co-infection in the grasshopper Dichroplus elongatus (Orthoptera: Acrididae: Melanoplinae)","authors":"C. Lange, Argentina Centro de Estudios Parasitológicos y de Vectores, M. Cigliano","doi":"10.21685/1680-0826-2019-13-1-2","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-1-2","url":null,"abstract":"","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67885417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.21685/1680-0826-2019-13-4-3
B. P. Karajan, O. Leonova, N. N. Bobyleva, V. Popenko
Cells of algae-containing (“green”) and alga-free (“white”) strains of the ciliate Climacostomum virens were compared for their responses towards a 1 h pulse of temperature stress. Although the upper heat shock temperature limits for the two strains were different (40–41 °C for “green”, and 37–38 °C for “white” cells), the responses to high temperature were similar. The delay in the completion of cell cycle depended on the cell cycle stage at which heat shock was given. Cells exposed to heat shocks at G1 stage or at the late dividing stage and returned back to 22 °C did not show any noticeable cell cycle lengthening. The most prominent effect was observed when the cells were heat-shock treated at the early dividing stage. In this case, heat shock resulted in up to 4 h delay of the cell cycle completion. It was found that in all experiments, when heat shock was given at different stages of division, the cell cycle duration of the progeny cells was significantly longer (42–50 h) than that of the control cells (21–25 h).
{"title":"Effect of heat shock on the cell cycle duration of algae-containing and algae-free ciliates Climacostomum virens","authors":"B. P. Karajan, O. Leonova, N. N. Bobyleva, V. Popenko","doi":"10.21685/1680-0826-2019-13-4-3","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-4-3","url":null,"abstract":"Cells of algae-containing (“green”) and alga-free (“white”) strains of the ciliate Climacostomum virens were compared for their responses towards a 1 h pulse of temperature stress. Although the upper heat shock temperature limits for the two strains were different (40–41 °C for “green”, and 37–38 °C for “white” cells), the responses to high temperature were similar. The delay in the completion of cell cycle depended on the cell cycle stage at which heat shock was given. Cells exposed to heat shocks at G1 stage or at the late dividing stage and returned back to 22 °C did not show any noticeable cell cycle lengthening. The most prominent effect was observed when the cells were heat-shock treated at the early dividing stage. In this case, heat shock resulted in up to 4 h delay of the cell cycle completion. It was found that in all experiments, when heat shock was given at different stages of division, the cell cycle duration of the progeny cells was significantly longer (42–50 h) than that of the control cells (21–25 h).","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67888051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21685/1680-0826-2019-13-3-4
I. Alekperov, E. Tahirova
A study of planktonic ciliate species diversity in the Caspian littoral of Absheron was conducted in 2014–2018. Fifty-seven ciliate species belonging to 21 families were revealed. A correlation has been established between the planktonic ciliates’ species richness and the organic pollution degree at the coastal zone. The status of some ciliate species as indicators of varying saprobity was clarified. The most precise indication using ciliates was obtained for alpha-meso and alpha-polysaprobic zones. We explain this fact by the more accurate data on ciliates indicators of more polluted zones and the erroneous certification of many ciliate species, currently considered as indicators of beta-alpha-mesosaprobic zone.
{"title":"Biomonitoring of antropogenic contamination of Absheron coast of the Caspian Sea at the level of planktonic ciliate communities","authors":"I. Alekperov, E. Tahirova","doi":"10.21685/1680-0826-2019-13-3-4","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-3-4","url":null,"abstract":"A study of planktonic ciliate species diversity in the Caspian littoral of Absheron was conducted in 2014–2018. Fifty-seven ciliate species belonging to 21 families were revealed. A correlation has been established between the planktonic ciliates’ species richness and the organic pollution degree at the coastal zone. The status of some ciliate species as indicators of varying saprobity was clarified. The most precise indication using ciliates was obtained for alpha-meso and alpha-polysaprobic zones. We explain this fact by the more accurate data on ciliates indicators of more polluted zones and the erroneous certification of many ciliate species, currently considered as indicators of beta-alpha-mesosaprobic zone.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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