Somayeh Rasouli-Dogaheh, M. Noroozi, Javad Khansha, M. A. Amoozegar, Rezvan Rahimi, Mahdi Moshtaghi Nikou, T. Hauer
{"title":"Khargia gen. nov., a new genus of simple trichal Cyanobacteria from the Persian Gulf","authors":"Somayeh Rasouli-Dogaheh, M. Noroozi, Javad Khansha, M. A. Amoozegar, Rezvan Rahimi, Mahdi Moshtaghi Nikou, T. Hauer","doi":"10.5507/fot.2022.012","DOIUrl":"https://doi.org/10.5507/fot.2022.012","url":null,"abstract":"","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42547159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Minh Ly Nguyen, Xuan Cuong Mai, Nhat Ha Chu, Dang Mau Trinh, Chao-Lin Liu, Chia-Rui Shen
{"title":"DNA signaturing derived from the internal transcribed spacer 2 (ITS2): a novel tool for identifying Desmodesmus species (Scenedesmaceae, Chlorophyta)","authors":"Minh Ly Nguyen, Xuan Cuong Mai, Nhat Ha Chu, Dang Mau Trinh, Chao-Lin Liu, Chia-Rui Shen","doi":"10.5507/fot.2022.005","DOIUrl":"https://doi.org/10.5507/fot.2022.005","url":null,"abstract":"","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48604442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Van de Vijver, David M. Williams, Wolf-Henning Kusber, M. Cantonati, P. Hamilton, C. E. Wetzel, L. Ector
Fragilaria gracilis is one of the most reported Fragilaria species in Europe, observed in a broad range of water bodies, ranging from (ultra)oligotrophic rivers to even eutrophic lakes. A revision of this important taxon based on the analysis of the morphology of a large number of historic and recent populations was highly needed. In the present study, type material of Fragilaria gracilis and several related taxa such as Synedra radians, Fragilaria pseudolaevissima, S. utermoehlii, F. aquaplus, F. boreomongolica and F. tridentina together with more than 10 modern populations were investigated using LM and SEM observations. The results based on these comparisons show that Fragilaria (Synedra) radians is the name for the taxon formerly known as F. gracilis. Moreover, detailed analysis demonstrated that F. pseudolaevissima and Synedra utermoehlii are conspecific with F. radians and should be considered as heterotypic synonyms. The observations made in this study also resulted in the description of several new species, often with distinct ecologies and distribution areas: Fragilaria huerlimannii Van de Vijver sp. nov., F. acerosa Van de Vijver, C.E.Wetzel, Jarlman et Ector sp. nov., F. neglecta Van de Vijver, C.E.Wetzel, Jarlman et Ector sp. nov., F. heudreana Van de Vijver, C.E.Wetzel et Ector sp. nov., F. eutraphenta Van de Vijver, Kusber et D.M.Williams sp. nov., and F. mertensiana Van de Vijver, C.E.Wetzel et Ector sp. nov. Using an analysis of the associated diatom flora, the ecological preferences of each taxon are briefly discussed.
细食Fragilaria gracilis是欧洲报道最多的Fragilara物种之一，在广泛的水体中观察到，从（超）贫营养河流到富营养湖泊。迫切需要在分析大量历史和近期种群形态的基础上对这一重要分类单元进行修订。本研究利用光学显微镜和扫描电镜观察，对纤细Fragilaria gracilis和几个相关类群如Synedra radians、Fragilara pseudolaevissima、S.utermoehlii、F.aquaplus、F.boreomonolica和F.tridentina以及10多个现代种群的类型物质进行了研究。基于这些比较的结果表明，Fragilaria（Synedra）radians是以前被称为F.gracilis的分类单元的名称。此外，详细的分析表明，F.pseudolaevissima和Synedra utermoehlii与F.radians是同种的，应被视为异型同义词。本研究中的观察结果还导致了对几个新物种的描述，这些物种通常具有不同的生态和分布区域：Fragilaria huerlimannii Van de Vijver sp.nov.、F.acerosa Van de Vij2ver、C.E.Wetzel、Jarlman et Ector sp.nov..、F.neglecta Van de Vijnver、C.E.Wetzel。，F.eutrachinta Van de Vijver，Kusber et D.M.Williams sp.nov.和F.mertensana Van de Vij ver，C.E.Wetzel et Ector sp.nov..通过对相关硅藻区系的分析，简要讨论了每个分类单元的生态偏好。
{"title":"Fragilaria radians (Kützing) D.M.Williams et Round, the correct name for F. gracilis (Fragilariaceae, Bacillariophyta): a critical analysis of this species complex in Europe","authors":"B. Van de Vijver, David M. Williams, Wolf-Henning Kusber, M. Cantonati, P. Hamilton, C. E. Wetzel, L. Ector","doi":"10.5507/fot.2022.006","DOIUrl":"https://doi.org/10.5507/fot.2022.006","url":null,"abstract":"Fragilaria gracilis is one of the most reported Fragilaria species in Europe, observed in a broad range of water bodies, ranging from (ultra)oligotrophic rivers to even eutrophic lakes. A revision of this important taxon based on the analysis of the morphology of a large number of historic and recent populations was highly needed. In the present study, type material of Fragilaria gracilis and several related taxa such as Synedra radians, Fragilaria pseudolaevissima, S. utermoehlii, F. aquaplus, F. boreomongolica and F. tridentina together with more than 10 modern populations were investigated using LM and SEM observations. The results based on these comparisons show that Fragilaria (Synedra) radians is the name for the taxon formerly known as F. gracilis. Moreover, detailed analysis demonstrated that F. pseudolaevissima and Synedra utermoehlii are conspecific with F. radians and should be considered as heterotypic synonyms. The observations made in this study also resulted in the description of several new species, often with distinct ecologies and distribution areas: Fragilaria huerlimannii Van de Vijver sp. nov., F. acerosa Van de Vijver, C.E.Wetzel, Jarlman et Ector sp. nov., F. neglecta Van de Vijver, C.E.Wetzel, Jarlman et Ector sp. nov., F. heudreana Van de Vijver, C.E.Wetzel et Ector sp. nov., F. eutraphenta Van de Vijver, Kusber et D.M.Williams sp. nov., and F. mertensiana Van de Vijver, C.E.Wetzel et Ector sp. nov. Using an analysis of the associated diatom flora, the ecological preferences of each taxon are briefly discussed.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46197582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Diatoms (Bacillariophyta) are unicellular organisms with extremely high species diversity. According to AlgaeBase, the names of approximately 17 thousand species are currently considered to be taxonomically accepted. It is assumed that there are about 100,000 species of diatoms on the planet. Sexual reproduction is an obligatory stage of the life cycle in many diatoms due to specific structure of their frustules and the mode of reduction and restoration of the latter. At the same time, analysis of literature showed that over the entire three–century history of the study, data (in some cases very incomplete) have been accumulated on the sexual reproduction of approximately 350 species. There are about 1000 literature sources providing information about sexual reproduction of diatoms. Here, we present a summary of those species of Bacillariophyta for which data on sexual reproduction are available. The degree of knowledge of the particular classes of diatoms was analysed.
{"title":"Diatoms with studied sexual reproduction","authors":"N. Davidovich, O. Davidovich","doi":"10.5507/fot.2022.003","DOIUrl":"https://doi.org/10.5507/fot.2022.003","url":null,"abstract":": Diatoms (Bacillariophyta) are unicellular organisms with extremely high species diversity. According to AlgaeBase, the names of approximately 17 thousand species are currently considered to be taxonomically accepted. It is assumed that there are about 100,000 species of diatoms on the planet. Sexual reproduction is an obligatory stage of the life cycle in many diatoms due to specific structure of their frustules and the mode of reduction and restoration of the latter. At the same time, analysis of literature showed that over the entire three–century history of the study, data (in some cases very incomplete) have been accumulated on the sexual reproduction of approximately 350 species. There are about 1000 literature sources providing information about sexual reproduction of diatoms. Here, we present a summary of those species of Bacillariophyta for which data on sexual reproduction are available. The degree of knowledge of the particular classes of diatoms was analysed.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42241130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: A new freshwater diatom species Conticribra sinica sp. nov. Yu, You et Wang from three lakes in the lower reaches of the Yangtze River, China, is described here using a combination of morphological and molecular data from ribosomal DNA genes. The primary distinguishing characteristic of C. sinica was the presence of a non–plicate or slightly–plicate valve face and a single ring marginal fultoportulae that was located at the junction between the valve face and the mantle. There were 4–11 valve face fultoportulae that were located at the subcenter of the valve face. In addition, a single rimoportula replaced a marginal fultoportulae. Areolae loculate were open to the outside by irregularly circular foramina or slit foramina that are radially arranged. Internally, cribra were continuously arranged long a radial arrangement of areolae. Characteristics of the new species with other similar species of Conticribra . Phylogenetic analysis of the nuclear small subunit (SSU) rDNA sequences and nuclear large subunit (LSU) rDNA gene sequences revealed that C. sinica in a single clade at a considerable sequence distance from the other Conticribra species.
本文利用核糖体DNA基因的形态学和分子数据，对来自中国长江下游三个湖泊的一种新的淡水硅藻Conticbra sinica sp.nov.Yu，You et Wang进行了描述。C.sinica的主要区别特征是存在一个无重复或轻微重复的阀面和一个位于阀面和地幔交界处的单环边缘富尔托普孔。有4–11个瓣口位于瓣面的亚中心。此外，一个边缘孔取代了边缘孔。室室的Areolae由放射状排列的不规则圆形孔或狭缝孔向外开放。婴儿床内部连续排列，呈乳晕放射状排列。本新种与其他类似种的特征。对核小亚基（SSU）rDNA序列和核大亚基（LSU）rNA基因序列的系统发育分析表明，中华绒螯蟹是一个单一的分支，与其他大陆虫物种有相当的序列距离。
{"title":"A new freshwater species Conticribra sinica (Thalassiosirales, Bacillariophyta) from the lower reaches of the Yangtze River, China","authors":"P. Yu, L. Yang, Q. You, Y. Bi, Quanxi Wang","doi":"10.5507/fot.2021.024","DOIUrl":"https://doi.org/10.5507/fot.2021.024","url":null,"abstract":": A new freshwater diatom species Conticribra sinica sp. nov. Yu, You et Wang from three lakes in the lower reaches of the Yangtze River, China, is described here using a combination of morphological and molecular data from ribosomal DNA genes. The primary distinguishing characteristic of C. sinica was the presence of a non–plicate or slightly–plicate valve face and a single ring marginal fultoportulae that was located at the junction between the valve face and the mantle. There were 4–11 valve face fultoportulae that were located at the subcenter of the valve face. In addition, a single rimoportula replaced a marginal fultoportulae. Areolae loculate were open to the outside by irregularly circular foramina or slit foramina that are radially arranged. Internally, cribra were continuously arranged long a radial arrangement of areolae. Characteristics of the new species with other similar species of Conticribra . Phylogenetic analysis of the nuclear small subunit (SSU) rDNA sequences and nuclear large subunit (LSU) rDNA gene sequences revealed that C. sinica in a single clade at a considerable sequence distance from the other Conticribra species.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43124470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Berthold, V. Werner, Forrest W. Lefler, Isabella P. Simon, H. Dail Laughinghouse IV
: Rocky intertidal regions are diverse as they provide many unique habitats for the growth of cyanobacteria. From outcrops battered by waves, tidal pools, and periods of desiccations due to tides, these regions offer distinct environments and much of their cyanobacterial diversity remains unexplored. To help elucidate cyanobacteria from this habitat, one nostocalean cyanobacterium from Brittany, France was isolated and cultured. Typical morphological features including filaments with heteropolar trichomes, basal or intercalary heterocytes, false branching, and long hyaline apical hairs suggested the genus Nunduva . The combination of 16S rRNA gene and 16S–23S rRNA internal transcribed spacer (ITS), along with diagnosable morphological characteristics supports a distinct taxon from previously described species. Herein, the novel false branching cyanobacterium Nunduva sanctimaloensis sp. nov. is described along with its reproduction through modified monocytes.
{"title":"The novel marine cyanobacterium Nunduva sanctimaloensis sp. nov. (Nostocales, Cyanobacteria) from rocky shores and its reproduction through modified monocytes","authors":"D. Berthold, V. Werner, Forrest W. Lefler, Isabella P. Simon, H. Dail Laughinghouse IV","doi":"10.5507/fot.2021.023","DOIUrl":"https://doi.org/10.5507/fot.2021.023","url":null,"abstract":": Rocky intertidal regions are diverse as they provide many unique habitats for the growth of cyanobacteria. From outcrops battered by waves, tidal pools, and periods of desiccations due to tides, these regions offer distinct environments and much of their cyanobacterial diversity remains unexplored. To help elucidate cyanobacteria from this habitat, one nostocalean cyanobacterium from Brittany, France was isolated and cultured. Typical morphological features including filaments with heteropolar trichomes, basal or intercalary heterocytes, false branching, and long hyaline apical hairs suggested the genus Nunduva . The combination of 16S rRNA gene and 16S–23S rRNA internal transcribed spacer (ITS), along with diagnosable morphological characteristics supports a distinct taxon from previously described species. Herein, the novel false branching cyanobacterium Nunduva sanctimaloensis sp. nov. is described along with its reproduction through modified monocytes.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44932583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Navicula similecataracta–rheni and N. aquitanonipponica are two new Navicula species recorded from the Nouvelle Aquitaine Region, southwestern France. Both new species belong to the linear–lanceolate Navicula species complex. A detailed iconography based on light and scanning microscopy observations is given for the type and complementary populations. Comparisons with close related species based both on literature and on microscope observations, particularly with N. cryptotenella , N. cataracta–rheni and Navicula sancti–naumii , support the erection of the two new species.
{"title":"Navicula similecataracta-rheni sp. nov. and N. aquitanonipponica sp. nov. (Bacillariophyta), two new species from Nouvelle-Aquitaine, Southwestern France - comparison with the related species N. cataracta-rheni Lange-Bertalot, N. cryptotenella Lange-Bertalot and N. sancti-naumii Levko et Metzeltin","authors":"Delphine Sagnet, B. Van de Vijver, L. Tudesque","doi":"10.5507/fot.2022.007","DOIUrl":"https://doi.org/10.5507/fot.2022.007","url":null,"abstract":": Navicula similecataracta–rheni and N. aquitanonipponica are two new Navicula species recorded from the Nouvelle Aquitaine Region, southwestern France. Both new species belong to the linear–lanceolate Navicula species complex. A detailed iconography based on light and scanning microscopy observations is given for the type and complementary populations. Comparisons with close related species based both on literature and on microscope observations, particularly with N. cryptotenella , N. cataracta–rheni and Navicula sancti–naumii , support the erection of the two new species.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45234186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: We add four new species to the recently established genus Lacustriella Kulikovskiy, Lange–Bertalot et Metzeltin and characterize morphology of the taxa based on LM and SEM observations. Lacustriella cuspidata , L. rombea , L. radiata and L. solita share all of the typical morphological features of the genus including longitudinal canal along each valve margin, radiate uniseriate striae terminated with large elongated areolae, and external distant raphe ends bent oppositely. L. cuspidata is peculiar among the other Lacustriella with rows of small pores look as if they continue striae on the surface of longitudinal canals as well as with the axial area sharply widened into the asymmetrical central area. L. rombea is different in combination of valve outline with unprotracted rostrate apices, irregular areolation at centre of the external valve, and slit–like areola occluded with volae. In L. radiata distinctive characters include protracted rostrate valve apices, rhombic central area and volated slit–like areolae. L. solita differs in the highest density of areolae in striae and an ornamented surface of longitudinal canals. New species were compared to the closest morphologically similar taxa. Some general ecological properties and distribution in the littoral zone of the ancient lake are given. microscope (Zeiss, Gottingen, Germany) with a 100× oil immersion objective. LM photographs were taken with an attached TOUPCAM TM DC UA1000CA camera. For scanning electron microscopy 50 µl aliquot of the suspension of cleaned valves was placed on aluminium stub, dried on air, coated with a gold in Balzers SCD 004 sputter coater and examined with an FEI Quanta 200 scanning electron microscope (Eindhoven, Netherland) at a working distance of 10 mm and acceleration voltages of 25–30 kV. Measurements of valves, density of striae and areolae in striae were taken for each photographed cell; at least 20 individuals of each taxon were studied. Valve structure terminology follows K rammer & L ange –B ertalot (1986), R ound et al. (1990) and K ulikovskiy et al. (2012, 2016).
我们在新近建立的laustriella Kulikovskiy, langer - bertalot et Metzeltin属中增加了4个新种，并基于LM和SEM观察对该分类群的形态进行了表征。虎湖、龙贝湖、辐射湖和孤独湖具有所有典型的形态特征，包括沿瓣缘的纵向管状、以大的细长乳纹终止的辐射状单列纹，以及相对弯曲的外部远缝端。纵管表面有成排的小孔，看起来像连续的条纹，轴向区向不对称的中心区急剧加宽，这是其他湖科植物中所特有的。乳清乳清的不同之处在于，乳清乳清瓣的轮廓不长，乳清瓣的顶端不长，外部乳清瓣的中心有不规则的乳晕，裂口状乳晕被肺泡闭塞。其显著特征包括瓣尖延长，中心呈菱形，乳晕呈裂口状。在纵管的纹状面和纹饰面上，单株的乳晕密度最高。将新种与形态上最接近的类群进行比较。给出了古湖沿岸地区的一般生态特性和分布。显微镜(蔡司，哥廷根，德国)，100倍油浸物镜。LM照片是用附带的TOUPCAM TM DC UA1000CA相机拍摄的。对于扫描电镜，将清洗后的阀门悬浮液的50µl放在铝制短管上，在空气中干燥，在Balzers SCD 004溅射涂层中涂上一层金，并用FEI Quanta 200扫描电子显微镜(Eindhoven, netherlands)在10 mm的工作距离和25-30 kV的加速电压下进行检查。测量每个被摄细胞的气孔、条纹密度和条纹中的乳晕;每个分类单元至少有20个个体被研究。阀门结构术语遵循K rammer和L ange -B ertalot (1986)， R ound等人(1990)和K ulikovskiy等人(2012,2016)。
{"title":"Four new species of the genus Lacustriella (Bacillariophyta) from Lake Baikal","authors":"Ye. V. Rodionova, G. Pomazkina, T. Sherbakova","doi":"10.5507/fot.2022.002","DOIUrl":"https://doi.org/10.5507/fot.2022.002","url":null,"abstract":": We add four new species to the recently established genus Lacustriella Kulikovskiy, Lange–Bertalot et Metzeltin and characterize morphology of the taxa based on LM and SEM observations. Lacustriella cuspidata , L. rombea , L. radiata and L. solita share all of the typical morphological features of the genus including longitudinal canal along each valve margin, radiate uniseriate striae terminated with large elongated areolae, and external distant raphe ends bent oppositely. L. cuspidata is peculiar among the other Lacustriella with rows of small pores look as if they continue striae on the surface of longitudinal canals as well as with the axial area sharply widened into the asymmetrical central area. L. rombea is different in combination of valve outline with unprotracted rostrate apices, irregular areolation at centre of the external valve, and slit–like areola occluded with volae. In L. radiata distinctive characters include protracted rostrate valve apices, rhombic central area and volated slit–like areolae. L. solita differs in the highest density of areolae in striae and an ornamented surface of longitudinal canals. New species were compared to the closest morphologically similar taxa. Some general ecological properties and distribution in the littoral zone of the ancient lake are given. microscope (Zeiss, Gottingen, Germany) with a 100× oil immersion objective. LM photographs were taken with an attached TOUPCAM TM DC UA1000CA camera. For scanning electron microscopy 50 µl aliquot of the suspension of cleaned valves was placed on aluminium stub, dried on air, coated with a gold in Balzers SCD 004 sputter coater and examined with an FEI Quanta 200 scanning electron microscope (Eindhoven, Netherland) at a working distance of 10 mm and acceleration voltages of 25–30 kV. Measurements of valves, density of striae and areolae in striae were taken for each photographed cell; at least 20 individuals of each taxon were studied. Valve structure terminology follows K rammer & L ange –B ertalot (1986), R ound et al. (1990) and K ulikovskiy et al. (2012, 2016).","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46403464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Yogeshwaran, C. Radhakrishnan, Atul P. Dwivedi, J. Kociolek, B. Karthick
{"title":"Humidophila manipurensis sp. nov. and the first record of Humidophila bigibba (Hustedt) Lowe, Kociolek, Johansen, Van de Vijver, Lange-Bertalot et Kopalová from Northeast India","authors":"M. Yogeshwaran, C. Radhakrishnan, Atul P. Dwivedi, J. Kociolek, B. Karthick","doi":"10.5507/fot.2022.001","DOIUrl":"https://doi.org/10.5507/fot.2022.001","url":null,"abstract":"","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44037125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Kulikovskiy, J. Kociolek, Y. Liu, I. Kuznetsova, A. Glushchenko
: We studied a new freshwater cymbelloid diatom taxon collected from Mongolia with light and scanning electron microscopy. The monotypic genus Vladinikolaevia gen. nov. , based on V. mongolica sp. nov, is described. The new genus is characterized by a combination of morphological features found in two well–known genera such as Cymbella and Encyonema . The raphe system is morphologically–similar to Encyonema but the presence of apical pore fields is similar to the genus Cymbella as presently circumscribed. There are other very interesting peculiarities found in V. mongolica sp. nov. that show it to be a distinct taxon. We discuss the morphology of this new genus in the context of valve morphogenesis and presence of primary and secondary valves. The description of this new genus from Mongolia supports our contention that Asia is home to many endemics, interesting and not yet described cymbelloid taxa.
利用光镜和扫描电镜对采自蒙古的淡水小叶硅藻新分类群进行了研究。本文描述了一种单型属，属属Vladinikolaevia gen. nov。新属的特点是在两个众所周知的属如Cymbella和enyonema中发现的形态特征的组合。缝系在形态上类似于气腹，但顶端孔场的存在与目前所限定的小叶草属相似。在蒙古紫杉中还发现了其他非常有趣的特征，表明它是一个独特的分类单元。我们在阀门形态发生和主要和次要阀门的存在的背景下讨论了这个新属的形态。这个蒙古新属的描述支持了我们的观点，即亚洲有许多有趣的、尚未被描述的小叶纲分类群。
{"title":"Vladinikolaevia, gen. nov. - a new enigmatic freshwater diatom genus (Cymbellaceae; Bacillariophyceae) from Mongolia","authors":"M. Kulikovskiy, J. Kociolek, Y. Liu, I. Kuznetsova, A. Glushchenko","doi":"10.5507/fot.2021.022","DOIUrl":"https://doi.org/10.5507/fot.2021.022","url":null,"abstract":": We studied a new freshwater cymbelloid diatom taxon collected from Mongolia with light and scanning electron microscopy. The monotypic genus Vladinikolaevia gen. nov. , based on V. mongolica sp. nov, is described. The new genus is characterized by a combination of morphological features found in two well–known genera such as Cymbella and Encyonema . The raphe system is morphologically–similar to Encyonema but the presence of apical pore fields is similar to the genus Cymbella as presently circumscribed. There are other very interesting peculiarities found in V. mongolica sp. nov. that show it to be a distinct taxon. We discuss the morphology of this new genus in the context of valve morphogenesis and presence of primary and secondary valves. The description of this new genus from Mongolia supports our contention that Asia is home to many endemics, interesting and not yet described cymbelloid taxa.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42590160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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