Pub Date : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0045
I. Jüttner, J. Chimonides, E. Cox
{"title":"Morphology, ecology and biogeography of diatom species related to Achnanthidium pyrenaicum (Hustedt) Kobayasi (Bacillariophyceae) in streams of the Indian and Nepalese Himalaya","authors":"I. Jüttner, J. Chimonides, E. Cox","doi":"10.1127/1864-1318/2011/0136-0045","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0045","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"45-76"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041024","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0167
B. Vijver, L. Ector, M. E. Beltrami, M. D. Haan, E. Falasco, D. Hlúbiková, Amelie Jarlman, M. Kelly, M. Novais, A. Wojtal
{"title":"A critical analysis of the type material of Achnanthidium lineare W. Sm. (Bacillariophyceae)","authors":"B. Vijver, L. Ector, M. E. Beltrami, M. D. Haan, E. Falasco, D. Hlúbiková, Amelie Jarlman, M. Kelly, M. Novais, A. Wojtal","doi":"10.1127/1864-1318/2011/0136-0167","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0167","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"8 1","pages":"167-191"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041263","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0019
D. Hlúbiková, L. Ector, L. Hoffmann
Diatoms of the Achnanthidium minutissimum species complex are widely distributed taxa believed to occur in different freshwater habitats from unpolluted oligotrophic to highly polluted hypereutrophic waters. However, the taxonomy and nomenclatural history of the species complex are complicated and rather confusing, because the species within the group often lack an adequate description and an exhaustive differential diagnosis drawing clear morphological and ecological species boundaries. To fill in this gap we examined the type materials of five different Achnanthidium species using light and scanning electron microscopy: Achnanthidium catenatum (J. Bilý et Marvan) lange-Bert., A. dolomiticum Cantonati et lange-Bert., A. eutrophilum (lange-Bert.) lange-Bert., A. saprophilum (H. KoBayasi et MayaMa) round et BuKHt. and A. straubianum (langeBert.) lange-Bert. Frustular morphology of the five taxa was studied in order to provide complementary information on the variability and ultrastructure of the nomenclatural types related to the A. minutissimum species complex. Our observations are mostly consistent with the original descriptions. Comparisons of morphological characters observed with the SEM showed that all species are closely related having many morphological features in common; however, they differ in the shape and variability of areolae. The SEM investigations demonstrated that ultrastructural characters on their own do not distinctly discriminate among the taxa. Morphometric comparisons indicated that the only distinct morphological features that could separate the Achnanthidium species studied are valve outline, striation pattern and valve dimensions.
微型硅藻是广泛分布于不同淡水生境的硅藻类群，从未污染的低营养水体到高度污染的富营养化水体。然而，物种复合体的分类学和命名史是复杂而混乱的，因为类群内的物种往往缺乏充分的描述和详尽的鉴别诊断，没有明确的形态和生态物种界限。为了填补这一空白，我们使用光学和扫描电子显微镜检查了五种不同的Achnanthidium catenatum (J. Bilý et Marvan) lange-Bert。， A.白云石(白云石)。， A.嗜营养菌(lange-Bert);， A. saprophilum (H. KoBayasi et MayaMa) round et BuKHt。和A. straubianum (langeBert)。研究了这5个类群的锥体形态，以提供与小叶橐吾种复合体相关的命名类型的变异和超微结构的补充信息。我们的观察结果与最初的描述基本一致。形态学特征与扫描电镜的比较表明，所有种属亲缘关系密切，有许多共同的形态学特征;然而，它们在乳晕的形状和可变性上有所不同。扫描电镜研究表明，不同类群间的超微结构特征差异不明显。形态计量学比较表明，唯一能够区分所研究的蜘蛛属物种的形态学特征是瓣膜轮廓、条纹模式和瓣膜尺寸。
{"title":"Examination of the type material of some diatom species related to Achnanthidium minutissimum (Kutz.) Czarn. (Bacillariophyceae)","authors":"D. Hlúbiková, L. Ector, L. Hoffmann","doi":"10.1127/1864-1318/2011/0136-0019","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0019","url":null,"abstract":"Diatoms of the Achnanthidium minutissimum species complex are widely distributed taxa believed to occur in different freshwater habitats from unpolluted oligotrophic to highly polluted hypereutrophic waters. However, the taxonomy and nomenclatural history of the species complex are complicated and rather confusing, because the species within the group often lack an adequate description and an exhaustive differential diagnosis drawing clear morphological and ecological species boundaries. To fill in this gap we examined the type materials of five different Achnanthidium species using light and scanning electron microscopy: Achnanthidium catenatum (J. Bilý et Marvan) lange-Bert., A. dolomiticum Cantonati et lange-Bert., A. eutrophilum (lange-Bert.) lange-Bert., A. saprophilum (H. KoBayasi et MayaMa) round et BuKHt. and A. straubianum (langeBert.) lange-Bert. Frustular morphology of the five taxa was studied in order to provide complementary information on the variability and ultrastructure of the nomenclatural types related to the A. minutissimum species complex. Our observations are mostly consistent with the original descriptions. Comparisons of morphological characters observed with the SEM showed that all species are closely related having many morphological features in common; however, they differ in the shape and variability of areolae. The SEM investigations demonstrated that ultrastructural characters on their own do not distinctly discriminate among the taxa. Morphometric comparisons indicated that the only distinct morphological features that could separate the Achnanthidium species studied are valve outline, striation pattern and valve dimensions.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"19-43"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64040966","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0193
B. Vijver, Amelie Jarlman, H. LANGE-BERTALOT, A. Mertens, M. D. Haan, L. Ector
Four new Achnanthidium species belonging to the species complex around A. minutissimum (Kutz.) Czarn. are described from different localities in Europe. Achnanthidium hoffmannii Van de VijVer, eCtor, a. Mertens et jarlMan nov. spec. was found in several oligotrophic, circumneutral rivers in Sweden. The species is characterized by the presence of irregular, slit-like areolae near the valve margin, clearly visible in LM. Achnanthidium acerosum Van de VijVer, lange-Bert. et jarlMan nov. spec., a narrow, linearlanceolate species with protracted, narrowly capitate apices, is likewise described from Sweden, but only found in one oligotrophic river in southern Sweden. Achnanthidium ertzii Van de VijVer et lange-Bert. nov. spec. was observed in a moss vegetation in a Laurisilva forest on the Portuguese island of Madeira. The species has an elongate, linear-elliptical valve outline with clearly capitate apices. The last species, A. tepidaricola Van de VijVer et M. de Haan nov. spec., found in a greenhouse of the National Botanic Garden of Belgium, has almost parallel margins and broadly rounded, protracted, capitate apices. All four species are sufficiently different from similar existing species.
属A. minutissimum (Kutz.)周围种复合体的四新种Czarn。来自欧洲不同的地区。Achnanthidium hoffmannii Van de VijVer, eCtor, a. Mertens et jarlMan 11 . specs在瑞典的几条贫营养、环中性河流中被发现。该物种的特点是存在不规则，裂口状乳晕附近的阀门边缘，清楚地可见在LM。兰格-伯特。et jarlMan 11 . spec.，一种狭窄的线状披针形种，具有长而窄的头状尖，在瑞典也有类似的描述，但只在瑞典南部的一条少营养河流中发现。凡·德·维杰·朗格·伯特。在葡萄牙马德拉岛Laurisilva森林的苔藓植被中观察到11 .种。本种有一拉长的，线性椭圆的阀的轮廓具清楚头状先端。最后一个物种是a . tepidaricola Van de VijVer et M. de Haan 11 . spec.，发现于比利时国家植物园的一个温室，边缘几乎平行，顶端呈宽圆形，延长，头状。这四个物种与现有的相似物种有很大的不同。
{"title":"Four new European Achnanthidium species (Bacillariophyceae)","authors":"B. Vijver, Amelie Jarlman, H. LANGE-BERTALOT, A. Mertens, M. D. Haan, L. Ector","doi":"10.1127/1864-1318/2011/0136-0193","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0193","url":null,"abstract":"Four new Achnanthidium species belonging to the species complex around A. minutissimum (Kutz.) Czarn. are described from different localities in Europe. Achnanthidium hoffmannii Van de VijVer, eCtor, a. Mertens et jarlMan nov. spec. was found in several oligotrophic, circumneutral rivers in Sweden. The species is characterized by the presence of irregular, slit-like areolae near the valve margin, clearly visible in LM. Achnanthidium acerosum Van de VijVer, lange-Bert. et jarlMan nov. spec., a narrow, linearlanceolate species with protracted, narrowly capitate apices, is likewise described from Sweden, but only found in one oligotrophic river in southern Sweden. Achnanthidium ertzii Van de VijVer et lange-Bert. nov. spec. was observed in a moss vegetation in a Laurisilva forest on the Portuguese island of Madeira. The species has an elongate, linear-elliptical valve outline with clearly capitate apices. The last species, A. tepidaricola Van de VijVer et M. de Haan nov. spec., found in a greenhouse of the National Botanic Garden of Belgium, has almost parallel margins and broadly rounded, protracted, capitate apices. All four species are sufficiently different from similar existing species.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"193-210"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041331","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0077
M. Kulikovskiy, H. LANGE-BERTALOT, A. Witkowski, G. Khursevich
{"title":"Achnanthidium sibiricum (Bacillariophyceae), a new species from bottom sediments in Lake Baikal","authors":"M. Kulikovskiy, H. LANGE-BERTALOT, A. Witkowski, G. Khursevich","doi":"10.1127/1864-1318/2011/0136-0077","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0077","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"77-87"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041073","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0131
M. Novais, D. Hlúbiková, M. Morais, L. Hoffmann, L. Ector
A new benthic freshwater diatom species belonging to the genus Achnanthidium Kutz. has been recorded from several watercourses in the North of Portugal. Achnanthid- ium caravelense Novais et Ector is described as a new species based on light and scanning electron microscopic observations, as well as on its ecological preferences as reconstructed from field observations. The most characteristic morphological features of this species are the different outline of the raphe valve (narrowly elliptic with linear margins) and the ra- pheless valve (narrowly elliptic to narrowly rhombic with moderately convex margins), the non-protracted broadly rounded apices and the length/width ratio. Furthermore, the areolae of the single row along the mantle are elongated and are more or less widely open, which is a characteristic discernible in girdle view under light microscopy. The species that A. caravelense resembles most is A. eutrophilum (LaNgE-BErt.) LaNgE-BErt.; nevertheless it can be distinguished from the latter by the different raphe valve outline, its higher valve length/width ratio and autecology. A. caravelense is common and abundant in soft waters with low to moderate nutrient content in the North of Portugal.
{"title":"Morphology and ecology of Achnanthidium caravelense (Bacillariophyceae), a new species from Portuguese rivers","authors":"M. Novais, D. Hlúbiková, M. Morais, L. Hoffmann, L. Ector","doi":"10.1127/1864-1318/2011/0136-0131","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0131","url":null,"abstract":"A new benthic freshwater diatom species belonging to the genus Achnanthidium Kutz. has been recorded from several watercourses in the North of Portugal. Achnanthid- ium caravelense Novais et Ector is described as a new species based on light and scanning electron microscopic observations, as well as on its ecological preferences as reconstructed from field observations. The most characteristic morphological features of this species are the different outline of the raphe valve (narrowly elliptic with linear margins) and the ra- pheless valve (narrowly elliptic to narrowly rhombic with moderately convex margins), the non-protracted broadly rounded apices and the length/width ratio. Furthermore, the areolae of the single row along the mantle are elongated and are more or less widely open, which is a characteristic discernible in girdle view under light microscopy. The species that A. caravelense resembles most is A. eutrophilum (LaNgE-BErt.) LaNgE-BErt.; nevertheless it can be distinguished from the latter by the different raphe valve outline, its higher valve length/width ratio and autecology. A. caravelense is common and abundant in soft waters with low to moderate nutrient content in the North of Portugal.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"131-150"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041170","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0211
A. Wojtal, L. Ector, B. Vijver, E. Morales, Saúl Blanco Lanza, J. Piątek, A. Smieja
Representatives of the Achnanthidium minutissimum (Kutz.) Czarn. complex are common and widespread diatoms in Poland. The following species were included in this study: Achnanthidium affine (Grunow) Czarn., A. caledonicum (LanGe-Bert.) LanGeBert., A. eutrophilum (LanGe-Bert.) LanGe-Bert., A. exile (Kutz.) HeiB., A. jackii raBenH., A. lineare w. Sm., and A. minutissimum. Two additional species are here formally described, namely Achnanthidium polonicum Van de VijVer, wojtaL, e. moraLeS et eCtor and A. acsiae wojtaL, e. moraLeS, Van de VijVer et eCtor. Information for an additional taxon is presented here, but it has been left unidentified until a larger population is found. Results of morphological analyses performed with light and scanning electron microscopy on this group of diatoms inhabiting springs, streams, rivers and lakes in southern Poland are illustrated and briefly discussed. Distribution of Achnanthidium caledonicum, A. eutrophilum, A. exile, A. lineare and A. minutissimum in waters of southern Poland corresponds well with literature reports of their autecology.
小Achnanthidium mintissimum(库兹)代表Czarn。复杂的硅藻是常见的和广泛分布在波兰。本研究包括以下种:仿射(Grunow) Czarn。， A. caledonicum (LanGe-Bert)LanGeBert。， A.嗜营养菌(LanGe-Bert)LanGe-Bert。A.流放(库兹)HeiB。A. jackii raBenH;A.直线;A. minutissimum。这里正式描述了另外两个物种，即Achnanthidium polonicum Van de VijVer, wojtaL, e. moraLeS et eCtor和a.a acsiae wojtaL, e. moraLeS, Van de VijVer et eCtor。这里提供了另一个分类单元的信息，但在发现更大的种群之前，它一直没有被确定。用光镜和扫描电镜对波兰南部的泉水、溪流、河流和湖泊中的这组硅藻进行了形态学分析，并进行了简要的讨论。在波兰南部水域，Achnanthidium caledonicum、a.t eutrophilum、a.t elea、a.l ineare和a.m minutissimum的分布与文献报道的它们的分布技术相吻合。
{"title":"The Achnanthidium minutissimum complex (Bacillariophyceae) in southern Poland","authors":"A. Wojtal, L. Ector, B. Vijver, E. Morales, Saúl Blanco Lanza, J. Piątek, A. Smieja","doi":"10.1127/1864-1318/2011/0136-0211","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0211","url":null,"abstract":"Representatives of the Achnanthidium minutissimum (Kutz.) Czarn. complex are common and widespread diatoms in Poland. The following species were included in this study: Achnanthidium affine (Grunow) Czarn., A. caledonicum (LanGe-Bert.) LanGeBert., A. eutrophilum (LanGe-Bert.) LanGe-Bert., A. exile (Kutz.) HeiB., A. jackii raBenH., A. lineare w. Sm., and A. minutissimum. Two additional species are here formally described, namely Achnanthidium polonicum Van de VijVer, wojtaL, e. moraLeS et eCtor and A. acsiae wojtaL, e. moraLeS, Van de VijVer et eCtor. Information for an additional taxon is presented here, but it has been left unidentified until a larger population is found. Results of morphological analyses performed with light and scanning electron microscopy on this group of diatoms inhabiting springs, streams, rivers and lakes in southern Poland are illustrated and briefly discussed. Distribution of Achnanthidium caledonicum, A. eutrophilum, A. exile, A. lineare and A. minutissimum in waters of southern Poland corresponds well with literature reports of their autecology.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"211-238"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64041410","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 : 2011-03-01DOI: 10.1127/1864-1318/2011/0136-0005
P. Compère, B. Vijver
{"title":"Achnanthidium ennediense (Compere) Compere et Van de Vijver comb. nov. (Bacillariophyceae), the true identity of Navicula ennediensis Compere from the Ennedi mountains (Republic of Chad)","authors":"P. Compère, B. Vijver","doi":"10.1127/1864-1318/2011/0136-0005","DOIUrl":"https://doi.org/10.1127/1864-1318/2011/0136-0005","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"136 1","pages":"5-17"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2011/0136-0005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64040910","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 : 2010-11-01DOI: 10.1127/1864-1318/2010/0135-0001
G. Zammit, Jan Kaštovský, P. Albertano
Two heterocytous filamentous cyanobacterial strains were isolated from biofilms growing in separate palaeo-Christian catacombs dedicated to St Agatha and St Paul at Rabat in Malta. The strains are characterised by a heterotrichous habit, intercalary hetero-cytes, true T-type branches and the presence of hormogonia. The ultrastructure was studied. Phylogenetic trees constructed using both distance and parsimony methods on 16S rRNA gene sequences showed that the isolates cluster with the heterocytous cyanobateria, but there is no apparent close similarity with any Stigonematalean genera described so far. The taxonomic and phylogenetic position of the isolates is discussed.
{"title":"A first cytomorphological and molecular characterisation of a new Stigonomatalean cyanobacterial morphotype isolated from Maltese catacombs","authors":"G. Zammit, Jan Kaštovský, P. Albertano","doi":"10.1127/1864-1318/2010/0135-0001","DOIUrl":"https://doi.org/10.1127/1864-1318/2010/0135-0001","url":null,"abstract":"Two heterocytous filamentous cyanobacterial strains were isolated from biofilms growing in separate palaeo-Christian catacombs dedicated to St Agatha and St Paul at Rabat in Malta. The strains are characterised by a heterotrichous habit, intercalary hetero-cytes, true T-type branches and the presence of hormogonia. The ultrastructure was studied. Phylogenetic trees constructed using both distance and parsimony methods on 16S rRNA gene sequences showed that the isolates cluster with the heterocytous cyanobateria, but there is no apparent close similarity with any Stigonematalean genera described so far. The taxonomic and phylogenetic position of the isolates is discussed.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"135 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2010/0135-0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64040345","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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