Pub Date : 2019-01-11DOI: 10.4467/16890027AP.18.013.10089
Wen Song, Jia-Mei Li, Yao-Moan Huang, K. Al-Rasheid, Weiwei Liu, Xiaozhong Hu, M. Miao
Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis
{"title":"Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis","authors":"Wen Song, Jia-Mei Li, Yao-Moan Huang, K. Al-Rasheid, Weiwei Liu, Xiaozhong Hu, M. Miao","doi":"10.4467/16890027AP.18.013.10089","DOIUrl":"https://doi.org/10.4467/16890027AP.18.013.10089","url":null,"abstract":"Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"2018 1","pages":"153-167"},"PeriodicalIF":0.5,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42724329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4467/16890027ap.19.019.12021
Giulia M. Ribeiro, P. Prado, R. Coutinho, Marina C. Rillo, S. P. Junior, A. L. Porfírio-Sousa, D. Lahr
Coexistence usually are exceeding the explicable rate by competitive exclusion principle. Since the pioneer Gause, many studies have used protist microcosm systems to study competitive exclusion. We explored a two-species system with the testate-amoebae: (Arcella intermedia and Pyxidicula operculata), where competitive exclusion is expected to occur. We determined their growth curves individually and under competitive interaction. We used a state-space model to represent system dynamics and calculated posterior population sizes simulating competition dynamics. Contrarily to our expectation, Arcella and Pyxidicula showed similar growth rates (1.37 and 1.46 days–1 respectively) and only different carrying capacity (1,997 and 25,108 cells cm–2 respectively). The maximum number of cells of both species when growing in competition was much lower if compared to the monospecific cultures (in average, 73% and 80% less for Arcella and Pyxidicula respectively). However, our competition experiments always resulted in coexistence. According to the models, the drop in growth rates and stochasticity mainly explains our coexistence results. We propose that a context of ephemeral resources can explain these results. Additionally, we propose generating factors of stochasticity as intraspecific variation, small population effects, toxicity of waste products and influence of the bacterial community.
{"title":"Growth Rate Modulation Enables Coexistence in a Competitive Exclusion Scenario Between Microbial Eukaryotes","authors":"Giulia M. Ribeiro, P. Prado, R. Coutinho, Marina C. Rillo, S. P. Junior, A. L. Porfírio-Sousa, D. Lahr","doi":"10.4467/16890027ap.19.019.12021","DOIUrl":"https://doi.org/10.4467/16890027ap.19.019.12021","url":null,"abstract":"Coexistence usually are exceeding the explicable rate by competitive exclusion principle. Since the pioneer Gause, many studies have used protist microcosm systems to study competitive exclusion. We explored a two-species system with the testate-amoebae: (Arcella intermedia and Pyxidicula operculata), where competitive exclusion is expected to occur. We determined their growth curves individually and under competitive interaction. We used a state-space model to represent system dynamics and calculated posterior population sizes simulating competition dynamics. Contrarily to our expectation, Arcella and Pyxidicula showed similar growth rates (1.37 and 1.46 days–1 respectively) and only different carrying capacity (1,997 and 25,108 cells cm–2 respectively). The maximum number of cells of both species when growing in competition was much lower if compared to the monospecific cultures (in average, 73% and 80% less for Arcella and Pyxidicula respectively). However, our competition experiments always resulted in coexistence. According to the models, the drop in growth rates and stochasticity mainly explains our coexistence results. We propose that a context of ephemeral resources can explain these results. Additionally, we propose generating factors of stochasticity as intraspecific variation, small population effects, toxicity of waste products and influence of the bacterial community.","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4467/16890027ap.19.017.12019
Jingbao Li, Keqing Wen, Erkang Zhu, Jingyi Wang
A soil urostylid ciliate Extraholosticha sylvatica, isolated from southern China, is studied using live observation and protargol impregnation. The main ontogenetic features of E. sylvatica are as follows: (a) in the proter, only the posterior part of the parental adoral zone of membranelles is renewed, while the anterior portion is retained; undulating membranes anlage undergo, like most hypotrichs, depolymerization of old undulating membranes and differentiation of new structures; (b) the oral primordium in the opisthe and the frontoventraltransverse cirral anlagen in both daughter cells are formed with contribution of the parental midventral cirri; (c) three frontal, one buccal, three to five frontoventral, one or two frontoterminal, two or three pretransverse ventral and six to 11 transverse cirri and 16–22 midventral pairs are generated from frontoventral-transverse cirral anlagen; (d) in both the left and the right marginal rows as well as the dorsal kineties, each two anlagen are formed intrakinetally; three to six caudal cirri are formed at the posterior end of the 5th dorsal kinety anlage; (e) the macronuclear nodules fuse into a single mass during the process.
{"title":"Morphology and morphogenesis of a Chinese population of a soil urostylid ciliate, Extraholosticha sylvatica (Foissner, 1982) Li et al., 2017 (Ciliophora, Hypotrichia)","authors":"Jingbao Li, Keqing Wen, Erkang Zhu, Jingyi Wang","doi":"10.4467/16890027ap.19.017.12019","DOIUrl":"https://doi.org/10.4467/16890027ap.19.017.12019","url":null,"abstract":"A soil urostylid ciliate Extraholosticha sylvatica, isolated from southern China, is studied using live observation and protargol impregnation. The main ontogenetic features of E. sylvatica are as follows: (a) in the proter, only the posterior part of the parental adoral zone of membranelles is renewed, while the anterior portion is retained; undulating membranes anlage undergo, like most hypotrichs, depolymerization of old undulating membranes and differentiation of new structures; (b) the oral primordium in the opisthe and the frontoventraltransverse cirral anlagen in both daughter cells are formed with contribution of the parental midventral cirri; (c) three frontal, one buccal, three to five frontoventral, one or two frontoterminal, two or three pretransverse ventral and six to 11 transverse cirri and 16–22 midventral pairs are generated from frontoventral-transverse cirral anlagen; (d) in both the left and the right marginal rows as well as the dorsal kineties, each two anlagen are formed intrakinetally; three to six caudal cirri are formed at the posterior end of the 5th dorsal kinety anlage; (e) the macronuclear nodules fuse into a single mass during the process.","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4467/16890027ap.19.010.11419
P. Vďačný, W. Foissner
The morphology and ontogenesis of a new psilotrichid ciliate, Hemiholosticha pantanalensis, were studied using live observation, protargol impregnation, and scanning electron microscopy. Diagnostic features of the new species include: a medium-sized, almost circular to broadly obovate body with a short anterior projection; two macronuclear nodules with a single micronucleus in between; a total of about 35 cirri arranged in three ventral, one postoral, one right and one left marginal row; three dorsal kineties extending along prominent ribs; an adoral zone occupying about 60% of body length; and intracellular, eyespot-bearing, green algae almost filling the body. The ontogenesis of H. pantanalensis follows the psilotrichid mode, being a mixture of features found not only in various hypotrich taxa but also in other spirotrich groups. Specifically, the oral primordium develops in a deep pouch as in euplotids and oligotrichs, the anlage for the undulating membranes does not produce cirri as in euplotids and some schmidingerothrichids, and the longitudinal ventral cirral row R3 develops from two anlagen as in some amphisiellids and kahliellids. Since psilotrichids are classified in a polytomy of main hypotrich lineages in 18S rRNA gene phylogenies, some of their ontogenetic features might be ancient spirotrich plesiomorphies while others might be homoplasies. Address for correspondence: Peter Vďačný, Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovak Republic; E-mail: peter. vdacny@uniba.sk
采用活体观察、原targol浸渍和扫描电镜等方法研究了一种新的拟纤毛虫(Hemiholosticha pantanalensis)的形态和个体发生。新种的诊断特征包括:中等大小，几乎圆形到宽倒卵形的身体，前突短;两个大核结节，中间有一个微核;共35个左右，排列在3个腹、1个后、1个右、1个左边缘行;三个背侧运动沿着突出的肋骨延伸;占体长约60%的口腔区;细胞内，眼斑，绿藻几乎充满了身体。H. pantanalensis的个体发生遵循原螺旋体模式，不仅在各种原螺旋体类群中发现，而且在其他螺旋体类群中也发现。具体来说，口腔原基在一个深袋中发育，如整倍体和少毛体，波动膜的支原体不产生卷毛，如整倍体和一些半毛毛体，纵向腹侧卷毛行R3由两个角原发育，如一些两栖体和kahliliids。由于在18S rRNA基因系统发育中，拟螺虫被划分为主要的亚营养谱系，因此它们的个体发育特征可能是古代螺虫的多形性，而另一些可能是同源性。通信地址:Peter Vďačný，布拉迪斯拉发夸美纽斯大学自然科学学院动物学系，ilkovi ova 6, 842 15布拉迪斯拉发，斯洛伐克共和国;电子邮件:彼得。vdacny@uniba.sk
{"title":"Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)","authors":"P. Vďačný, W. Foissner","doi":"10.4467/16890027ap.19.010.11419","DOIUrl":"https://doi.org/10.4467/16890027ap.19.010.11419","url":null,"abstract":"The morphology and ontogenesis of a new psilotrichid ciliate, Hemiholosticha pantanalensis, were studied using live observation, protargol impregnation, and scanning electron microscopy. Diagnostic features of the new species include: a medium-sized, almost circular to broadly obovate body with a short anterior projection; two macronuclear nodules with a single micronucleus in between; a total of about 35 cirri arranged in three ventral, one postoral, one right and one left marginal row; three dorsal kineties extending along prominent ribs; an adoral zone occupying about 60% of body length; and intracellular, eyespot-bearing, green algae almost filling the body. The ontogenesis of H. pantanalensis follows the psilotrichid mode, being a mixture of features found not only in various hypotrich taxa but also in other spirotrich groups. Specifically, the oral primordium develops in a deep pouch as in euplotids and oligotrichs, the anlage for the undulating membranes does not produce cirri as in euplotids and some schmidingerothrichids, and the longitudinal ventral cirral row R3 develops from two anlagen as in some amphisiellids and kahliellids. Since psilotrichids are classified in a polytomy of main hypotrich lineages in 18S rRNA gene phylogenies, some of their ontogenetic features might be ancient spirotrich plesiomorphies while others might be homoplasies. Address for correspondence: Peter Vďačný, Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovak Republic; E-mail: peter. vdacny@uniba.sk","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70977992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4467/16890027ap.19.014.11915
Gerhard Jager, L. Basson, Jacqueline van Marwijk
{"title":"A New Trichodina Species (Peritrichia: Mobilida) from Anuran Tadpole Hosts, Sclerophrys spp. in the Okavango Panhandle, Botswana, with Comments on this Taxon","authors":"Gerhard Jager, L. Basson, Jacqueline van Marwijk","doi":"10.4467/16890027ap.19.014.11915","DOIUrl":"https://doi.org/10.4467/16890027ap.19.014.11915","url":null,"abstract":"","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4467/16890027ap.19.016.12018
W. Lee
A total of 155 species and 75 genera were found at marine sediments in Sydney region (Australia) and are described using light microscopy: 117 species at Port Botany, 111 species at Kogarah Bay, 94 species at Woolooware Bay, 126 species at Quibray Bay, 74 species at Avoca beach, 48 species at Watsons Bay. The records include accounts of 15 unidentified taxa and two new taxa: Eoramonas jungensis sp. nov. (Eoramonas gen. nov.), Protaspa flexibilis sp. nov. Most flagellates described here have been found at other locations worldwide, but many species not reported from any other locations. I am unable to assess if these species are endemic because of the lack of intensive studies elsewhere. However, these results suggest that the flagellate communities from Botany Bay are distinctive.
{"title":"Small Free-Living Heterotrophic Flagellates from Marine Intertidal Sediments of the Sydney Region, Australia","authors":"W. Lee","doi":"10.4467/16890027ap.19.016.12018","DOIUrl":"https://doi.org/10.4467/16890027ap.19.016.12018","url":null,"abstract":"A total of 155 species and 75 genera were found at marine sediments in Sydney region (Australia) and are described using light microscopy: 117 species at Port Botany, 111 species at Kogarah Bay, 94 species at Woolooware Bay, 126 species at Quibray Bay, 74 species at Avoca beach, 48 species at Watsons Bay. The records include accounts of 15 unidentified taxa and two new taxa: Eoramonas jungensis sp. nov. (Eoramonas gen. nov.), Protaspa flexibilis sp. nov. Most flagellates described here have been found at other locations worldwide, but many species not reported from any other locations. I am unable to assess if these species are endemic because of the lack of intensive studies elsewhere. However, these results suggest that the flagellate communities from Botany Bay are distinctive.","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New discoveries of the genus Thuricola Kent, 1881 (Ciliophora, Peritrichia, Vaginicolidae), with descriptions of three poorly known species from China","authors":"Borong Lu, D. Ji, Yalan Sheng, Weibo Song, Xiaozhong Hu, Xiangrui Chen, K. Al-Rasheid","doi":"10.4467/16890027AP.18.011.8985","DOIUrl":"https://doi.org/10.4467/16890027AP.18.011.8985","url":null,"abstract":"New discoveries of the genus Thuricola Kent, 1881 (Ciliophora, Peritrichia, Vaginicolidae), with descriptions of three poorly known species from China","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"2018 1","pages":"123-143"},"PeriodicalIF":0.5,"publicationDate":"2018-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49042828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-14DOI: 10.4467/16890027AP.18.010.8984
Y. Ning, Yongqiang Yang, Tengteng Zhang, Lingyun Chen, K. Al-Rasheid, Zhenzhen Yi
Integrative Studies on the Morphology, Morphogenesis and Molecular Phylogeny of a Soil Ciliate, Parakahliella macrostoma (Foissner, 1982) Berger et al., 1985 (Ciliophora, Hypotrichia)
{"title":"Integrative Studies on the Morphology, Morphogenesis and Molecular Phylogeny of a Soil Ciliate, Parakahliella macrostoma (Foissner, 1982) Berger et al., 1985 (Ciliophora, Hypotrichia)","authors":"Y. Ning, Yongqiang Yang, Tengteng Zhang, Lingyun Chen, K. Al-Rasheid, Zhenzhen Yi","doi":"10.4467/16890027AP.18.010.8984","DOIUrl":"https://doi.org/10.4467/16890027AP.18.010.8984","url":null,"abstract":"Integrative Studies on the Morphology, Morphogenesis and Molecular Phylogeny of a Soil Ciliate, Parakahliella macrostoma (Foissner, 1982) Berger et al., 1985 (Ciliophora, Hypotrichia)","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"2018 1","pages":"107-122"},"PeriodicalIF":0.5,"publicationDate":"2018-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47390467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-14DOI: 10.4467/16890027ap.18.012.8986
A. G. Islas-Ortega, R. Aguilar-Aguilar, P. Marcotegui, S. Martorelli, D. Hernández-Mena, G. P. León
Morphology and Sequence Data of Mexican Populations of the Ciliate Parasite of Marine Fishes Trichodina rectuncinata (Ciliophora: Trichodinidae)
墨西哥海洋鱼类直钩毛滴虫（Ciliophora：毛滴虫科）纤毛虫寄生种群的形态学和序列数据
{"title":"Morphology and Sequence Data of Mexican Populations of the Ciliate Parasite of Marine Fishes Trichodina rectuncinata (Ciliophora: Trichodinidae)","authors":"A. G. Islas-Ortega, R. Aguilar-Aguilar, P. Marcotegui, S. Martorelli, D. Hernández-Mena, G. P. León","doi":"10.4467/16890027ap.18.012.8986","DOIUrl":"https://doi.org/10.4467/16890027ap.18.012.8986","url":null,"abstract":"Morphology and Sequence Data of Mexican Populations of the Ciliate Parasite of Marine Fishes Trichodina rectuncinata (Ciliophora: Trichodinidae)","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"2018 1","pages":"145-151"},"PeriodicalIF":0.5,"publicationDate":"2018-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43228033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-14DOI: 10.4467/16890027AP.18.007.8981
Yufan Deng, Xiaoteng Lu, Jingbao Li, Sang Ba, T. S. Paiva
Morphology of Two Eschaneustyla Species (Ciliophora, Urostylida), with Notes on Morphogenesis of Eschaneustyla lugeri
两种盾壳虫（Ciliophora，Urostylida）的形态特征及盾壳虫形态发生的研究
{"title":"Morphology of two Eschaneustyla species (Ciliophora, Urostylida), with notes on morphogenesis of Eschaneustyla lugeri","authors":"Yufan Deng, Xiaoteng Lu, Jingbao Li, Sang Ba, T. S. Paiva","doi":"10.4467/16890027AP.18.007.8981","DOIUrl":"https://doi.org/10.4467/16890027AP.18.007.8981","url":null,"abstract":"Morphology of Two Eschaneustyla Species (Ciliophora, Urostylida), with Notes on Morphogenesis of Eschaneustyla lugeri","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"57 1","pages":"69-78"},"PeriodicalIF":0.5,"publicationDate":"2018-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43815054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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