Archiv für Protistenkunde最新文献

{"title":"Light and electron microscopical observations on Protoceratium reficulatum (Dinophyceae)","authors":"G. Hansen ,&nbsp;O. Moestrup ,&nbsp;K.R. Roberts","doi":"10.1016/S0003-9365(97)80062-0","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80062-0","url":null,"abstract":"<div><p>Light and electron microscopical observations have been made on the gonyaulacoid dinoflagellate <em>Protoceratium reficulatum</em> (<span>Claparède</span> et <span>Lachmann</span>) <span>Bütschli</span> collected close to the type locality of <em>Protoceratium aceros</em><span>Bergh</span>, the type species of <em>Protoceratium</em>. Analysis of plate tabulation shows agreement with <em>Gonyaulax grindleyi</em><span>REINECKE</span> and supports conspecificity between <em>P. reticulatum</em>, <em>P. aceros</em> and <em>G. grindleyi</em>, the first name having priority. The ultrastructure includes a branched chloroplast and a centrally located pyrenoid complex. The pusular system consists of one or two sac pusules associated with the flagellar canals. The three-dimensional arrangement of the flagellar apparatus is basically similar to that of other dinoflagellates except for the presence of a single microtubular root associated with the longitudinal basal body. Each flagellar canal is surrounded by a distinct striated fibrous collar. The collars are interconnected by two striated connectives. The plate tabulation and fine structure of <em>Protoceratium reficulatum</em> indicate close relationship to the genus <em>Gonyaulax</em>, with minor differences in plate tabulation and fine structure. It is suggested to maintain the genus <em>Protoceratium</em> until the fine structural diversity with <em>Gonyaulax</em> is better known.</p></div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 381-391"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80062-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72292500","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}

{"title":"Variabilität von Scenedesmus acuminatus (Lagerh.) Chod. und Scenedesmus pectinatusMeyen in Nährlösungen mit unterschiedlichem NaCI-Gehalt","authors":"Rumen Mladenov ,&nbsp;Detelina Belkinova","doi":"10.1016/S0003-9365(97)80064-4","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80064-4","url":null,"abstract":"<div><p>Clonal cultures from <em>Scenedesmus acuminatus</em> (<span>Lagerh.</span>) <span>Chod</span>. and <em>Scenedesmus pectinatus</em><span>Meyen</span> were studied in regard to the variability of coenobia by an intensive cultivation using nutritional medium with different NaCl concentrations. With an increasing salinity of the medium in the clonal cultures from both species, coenobia corresponding to <em>Scenedesmus regularis</em> SVIR. were found. Concrete conclusions for changeability of characteristics concerning the taxonomic status of <em>S. acuminatus</em> (<span>Lagerh.</span>) <span>Chod.</span> and <em>S. pectinatus</em><span>Meven</span> are drawn.</p></div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 393-399"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80064-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72292501","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}

{"title":"The Heterotrophic Ebridian Microflagellate Hermesinum adriaticumZach. in the Adriatic Sea","authors":"D. Viličić, I. Marasović, G. Kušpilić","doi":"10.1016/S0003-9365(97)80061-9","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80061-9","url":null,"abstract":"","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"79 4 1","pages":"373-379"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89261113","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}

{"title":"Sarcomonad ribosomal RNA sequences, rhizopod phylogeny, and the origin of euglyphid amoebae","authors":"T. Cavalier-Smith ,&nbsp;E.E. Chad","doi":"10.1016/S0003-9365(97)80050-4","DOIUrl":"10.1016/S0003-9365(97)80050-4","url":null,"abstract":"<div><p>We have sequenced the 18S rRNA genes of six sarcomonad flagellates from the orders Cercomonadida (<em>Heteromita globosa</em> and four <em>Cercomonas</em> species) and Thaumatomonadida (<em>Thaumatomonas</em> sp.). Phylogenetic analysis by maximum likelihood; parsimony and two distance methods shows that these two orders are related, supporting their classification in a revised class Sarcomonadea. Molecular divergence within <em>Cercomonas</em> is huge: as great as among all fungi or land plants. <em>Heteromita</em>, <em>Thaumatomonas</em> and euglyphid testate amoebae all apparently evolved from <em>Cercomonas</em>-like ancestors. Euglyphids and thaumatomonads, which both bear silicious scales, are more closely interrelated than are some species of <em>Cercomonas</em>. The Glade comprising sarcomonads and Testaceafilosia is a sister to the amoeboflagellate chlorarachnean algae. Our trees robustly show that sarcomonads, euglyphids, and Chlorarachnea are together specifically related to <em>Plasmodiophora</em>, previously classified in the opalozoan class Phytomyxea: these taxa are now all included in a revised phylum Rhizopoda. Phylogenetic analysis of rRNA sequences representing all major lineages of neokaryotes (i.e. eukaryotes branching above Euglenozoa on molecular trees) shows that Rhizopoda are one of thirteen major neokaryote Glades and are phylogenetically distinct from lobose amoebae (subphylum Lobosa of the phylum Amoebozoa). Rhizopoda may be one of the earliest diverging megakaryote Glades.</p></div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 227-236"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80050-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90246320","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}

{"title":"Light and electron microscopical observations on Protoceratium reficulatum (Dinophyceae)","authors":"G. Hansen, Ø. Moestrup, K. Roberts","doi":"10.1016/S0003-9365(97)80062-0","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80062-0","url":null,"abstract":"","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"23 1","pages":"381-391"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86344375","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}

{"title":"The ultrastructure and systematic position of the euglenozoon Postgaardi mariagerensis, Fenchel et al","authors":"A. Simpson, J. V. D. Hoff, C. Bernard, H. Burton, D. Patterson","doi":"10.1016/S0003-9365(97)80049-8","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80049-8","url":null,"abstract":"","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"28 1","pages":"213-225"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78688455","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}

{"title":"Two new species of marine amoebae: Hartmannella lobifera n. sp. and Korotnevella nivo n. sp. (Lobosea, Gymnamoebida)","authors":"Alexey V. Smirnov","doi":"10.1016/S0003-9365(97)80055-3","DOIUrl":"10.1016/S0003-9365(97)80055-3","url":null,"abstract":"<div><p>Two new species of marine amoebae, isolated from the Sound (Denmark) are described. Comparison of <em>Korotnevella nivo</em> n. sp. with other known species of this genus indicated that it is difficult to use the structure of surface scales in Paramoebidae as a taxonomic character. One of the characteristic features of <em>Hartmannella lobifera</em> n. sp. is its remarkable cyst structure.</p></div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 283-292"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80055-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78043838","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}

{"title":"Amoeboflagellates and mitochondrial cristae in eukaryote evolution: megasystematics of the new protozoan subkingdoms eozoa and neozoa","authors":"T. Cavalier-Smith","doi":"10.1016/S0003-9365(97)80051-6","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80051-6","url":null,"abstract":"<div><p>Recent molecular and ultrastructural discoveries necessitate major changes in the higher level classification of the kingdom Protozoa. A new class Anaeromonadea and subphylum Anaeromonada are created for the anaerobic tetrakont flagellate <em>Trimastix</em>, which is grouped with Parabasala, ranked as a subphylum, to form the new protozoan phylum Trichozoa. To simplify the supraphyletic classification of Protozoa I dispense with the category parvkingdom by increasing Neozoa in rank from infrakingdom to subkingdom and creating a new subkingdom Eozoa for the eokaryote phyla Trichozoa, Percolozoa and Euglenozoa.</p><p>The subkingdom Neozoa, containing all neokaryote Protozoa, is divided into four infrakingdoms: Sarcodina infrak. nov.; Alveolata <span>Cavalier-Smith</span> 1991; Actinopoda <span>Calkins</span> 1902, stat. nov.; and Neomonada infrak. nov. Sarcodina are subdivided into three superphyla: Eosarcodina superph. nov. (phyla Reticulosa and Mycetozoa); Neosarcodina (phyla Amoebozoa and Rhizopoda); and Haplosporidia (phylum Haplosporidia). Paramyxia are treated as a superclass within infraphylum Sporozoa of the Apicomplexa, not as a separate phylum.</p><p>Major changes are made to the tubulicristate phylum Opalozoa: I transfer the partially pseudopodial opalozoan groups into Rhizopoda; I move Proteromonadida into the subphylum Opalinata, and group the remaining non-opalinate opalozoans with the Choanozoa as a new zooflagellate phylum Neomonada, leaving only the revised Opalinata in the Opalozoa; these residual Opalozoa are left as protists incertae sedis, as it is unclear whether they belong in the kingdom Protozoa or Chromista. Neomonada are divided into four subphyla: Choanozoa stat. nov. (classes Choanoflagellea, Coral lochytrea); Hemimastigophora; Apusozoa subphyl. nov. (classes Thecomonadea, Anisomonadea, Jacobea cl. nov., Ebridea) and Isomita subphyl. nov. (classes Telonemea and Cyathobodonea).</p><p><em>Commation</em> is transferred from Heterokonta to Apusozoa. Three apusozoan orders (Discocelida; Caecitellida; and Commatiida) are created. Within the revised Rhizopoda I group Sarcomonadea (revised by excluding proteomyxids and <em>Jakoba</em>) and Filosea together as a new subphylum Monadofilosa, and group Chlorarachnea with the formerly opalozoan class Proteomyxidea as a second new rhizopod subphylum, Reticulofilosa; Phytomyxea are removed from Opalozoa and treated as a third new rhizopod subphylum, Phytomyxa.</p><p>Lobose amoebae are excluded from Rhizopoda and placed in the separate sarcodine phylum Amoebozoa as a subphylum (Lobosa) comprising the classes Amoebaea and Testacealobosea. A new amoebozoan subphylum (Holomastiga) and class (Holomastigea) are created for <em>Multicilia</em>, and Archamoebae (classes Pelobiontea and Entamoebea) are treated as a third subphylum of Amoebozoa.</p><p>A central role for amoeboflagellates in eukaryote cell evolution is proposed. I suggest that ancestral eukaryotes were non-amoeboid zoofl","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 237-258"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80051-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72205919","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}

{"title":"Pirsonia, phagotrophic nanoflagellates incertae sedis, feeding on marine diatoms: attachment, fine structure and taxonomy","authors":"Eberhard Schnepf ,&nbsp;Michael Schweikert","doi":"10.1016/S0003-9365(97)80060-7","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80060-7","url":null,"abstract":"<div><p>After being chemotactically attracted by its host, marine diatoms of the genus <em>Coscinodiscus</em>, the <em>Pirsonia</em> flagellates are guided by the topography of the host cell surface to the rimoportulae through which the trophosome, a basally formed pseudopodium, penetrates into the diatom. Cytochalasin D does not disturb the chemotaxis of the flagellates but inhibits their attachment. <em>Pirsonia diadema</em> and <em>P. guinardiae</em>, feeding on <em>Coscinodiscus</em> and on <em>Guinardia flaccida</em>, respectively, are very similar in their fine structure. The anterior flagellum has tubular hairs which seem to belong to the tripartite, stramenopile type. They are synthesized within the ER and exocytosed by the Golgi apparatus. In certain developmental stages the posterior flagellum and the cell body bear „knotted hairs“ which differ in length. The mode of their formation is unknown. The mitochondria have unique non-contorted tubular cristae which are parallel to each other. The few dictyosomes have a parabasal position. The flagellar root apparatus consists of fibrillar bands which connect the basal body of the anterior flagellum with the nucleus and with the basal body of the posterior flagellum. Other fibrillar bands and a few microtubules run from the basal bodies to the cell surface. The organization of the flagellar root apparatus thus differs from that of typical stramenopiles. The taxonomic position of <em>Pirsonia</em> is discussed.</p></div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"147 3","pages":"Pages 361-371"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80060-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72292497","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}

{"title":"Posttraumatic somatic macronuclear reorganization in Heliophrya erhardi, suctoria, ciliata (With Notes on Regeneration of Tentacles and Pulsating Vacuoles)","authors":"H. Lanners","doi":"10.1016/S0003-9365(97)80052-8","DOIUrl":"https://doi.org/10.1016/S0003-9365(97)80052-8","url":null,"abstract":"","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"64 6 1","pages":"259-263"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76691245","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}