I. Chapuis, M. L. Vis, O. Necchi, P. Castillo, M. Aboal, G. Zuccarello
Fifty-four streams of the Iberian Peninsula were investigated to document the species richness and phylogeny of Batrachospermum and morphologically similar genera, determine phylogenetic affinities of taxa and infer biogeographic trends. Species were identified using morphology and DNA sequence data for the rbcL gene as follows: Batrachospermum gelatinosum, B. pozoazulense, Paludicola keratophyta, Sheathia arcuata, S. boryana, S. confusa, Torularia atra, Virescentia helminthosa, V. vogesiaca, and Volatus carrionii. Batrachospermum gelatinosum and S. boryana were most frequent (sampled from 16 and 11 streams, respectively). Torularia atra and V. vogesiaca were each collected in a single stream, whereas the other five taxa were present in three to six streams. Virescentia vogesiaca is well known from other parts of Europe but had previously not been reported from the Iberian Peninsula. Biogeographic trends based on DNA sequence data show a flora with most species being well represented in parts of Europe, two taxa (B. gelatinosum and V. carrionii) that are shared between Europe and North America, one between Europe and South America (Paludicola keratophyta) and one cosmopolitan species (T. atra). Previous studies reported twelve taxa in the region using current taxonomy. This study has confirmed seven of these taxa with sequence data and morphology.
{"title":"Diversity of Batrachospermales (Rhodophyta) in the Iberian Peninsula","authors":"I. Chapuis, M. L. Vis, O. Necchi, P. Castillo, M. Aboal, G. Zuccarello","doi":"10.5507/FOT.2020.018","DOIUrl":"https://doi.org/10.5507/FOT.2020.018","url":null,"abstract":"Fifty-four streams of the Iberian Peninsula were investigated to document the species richness and phylogeny of Batrachospermum and morphologically similar genera, determine phylogenetic affinities of taxa and infer biogeographic trends. Species were identified using morphology and DNA sequence data for the rbcL gene as follows: Batrachospermum gelatinosum, B. pozoazulense, Paludicola keratophyta, Sheathia arcuata, S. boryana, S. confusa, Torularia atra, Virescentia helminthosa, V. vogesiaca, and Volatus carrionii. Batrachospermum gelatinosum and S. boryana were most frequent (sampled from 16 and 11 streams, respectively). Torularia atra and V. vogesiaca were each collected in a single stream, whereas the other five taxa were present in three to six streams. Virescentia vogesiaca is well known from other parts of Europe but had previously not been reported from the Iberian Peninsula. Biogeographic trends based on DNA sequence data show a flora with most species being well represented in parts of Europe, two taxa (B. gelatinosum and V. carrionii) that are shared between Europe and North America, one between Europe and South America (Paludicola keratophyta) and one cosmopolitan species (T. atra). Previous studies reported twelve taxa in the region using current taxonomy. This study has confirmed seven of these taxa with sequence data and morphology.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"73-81"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45458617","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}
Sampling of fungi in a grassland on a hill in Rojkov, Central Slovakia, revealed a new species of Luticola (Diadesmidaceae). Its terrestrial populations were found close to the basis of the fertile part of the geoglossoid fungi (Geoglossaceae) that were overgrown with filamentous cyanobacteria of the orders Oscillatoriales and Synechococcales. Luticola rojkoviensis sp. nov. is characterized by the valve outline and the structure of the external valve face: valves are weakly dorsiventrally asymmetrical, rhombic-lanceolate in larger cells to rhombic-elliptic and tri-undulate in smaller cells, with shortly protracted and broadly rounded valve apices. Valve face is minimally concave, as the axial area is lowered and the area around distal raphe elevated. The surface of the valve is mostly uneven due to many depressions, so the external shape of the areolae and the impression of irregular longitudinal rows depend on the extent of these valve ornamentations. Proximal raphe endings are unilaterally slightly deflected, expanded into small central pores. The shape of both the proximal and the distal raphe fissures is slightly asymmetrical. The morphological characteristics of Luticola rojkoviensis sp. nov. are remarkably similar to those of L. hustedtii Levkov, Metzeltin et A.Pavlov, L. ectorii Levkov, Metzeltin et A.Pavlov and L. acidoclinata Lange-Bertalot. The association of Luticola rojkoviensis sp. nov. with geoglossoid fungi and epiphytic cyanobacteria is discussed.
在斯洛伐克中部Rojkov的一个小山上的草地上对真菌进行采样，发现了一种新的Luticola (Diadesmidaceae)。它的陆地种群被发现接近地舌菌(地舌菌科)的肥沃部分的基础，那里长满了丝状蓝藻目的摆动目和聚藻目。Luticola rojkoviensis sp. 11 .的特征是阀外形和外阀面结构:阀弱背侧不对称，大细胞的阀形为菱形披针形，小细胞的阀形为菱形椭圆形，三波状，阀尖短而宽而圆。由于轴向区域降低，中缝周围区域升高，阀面最小凹。由于有许多凹陷，瓣膜表面大多凹凸不平，因此乳晕的外部形状和不规则纵排的印象取决于这些瓣膜纹饰的程度。近端中缝末端单侧稍偏转，扩大成小的中央孔。中缝近端和远端裂缝的形状都略有不对称。Luticola rojkoviensis sp. 11 .的形态特征与L. hustedtii Levkov, Metzeltin et A.Pavlov, L. ectorii Levkov, Metzeltin et A.Pavlov和L. acidoclinata lue - bertalot的形态特征非常相似。讨论了Luticola rojkoviensis sp. 11与地红真菌和附生蓝藻的关联。
{"title":"Luticola rojkoviensis sp. nov. (Bacillariophyta), a new terrestrial diatom from Central Slovakia","authors":"A. Hindáková, T. Noga","doi":"10.5507/FOT.2020.014","DOIUrl":"https://doi.org/10.5507/FOT.2020.014","url":null,"abstract":"Sampling of fungi in a grassland on a hill in Rojkov, Central Slovakia, revealed a new species of Luticola (Diadesmidaceae). Its terrestrial populations were found close to the basis of the fertile part of the geoglossoid fungi (Geoglossaceae) that were overgrown with filamentous cyanobacteria of the orders Oscillatoriales and Synechococcales. Luticola rojkoviensis sp. nov. is characterized by the valve outline and the structure of the external valve face: valves are weakly dorsiventrally asymmetrical, rhombic-lanceolate in larger cells to rhombic-elliptic and tri-undulate in smaller cells, with shortly protracted and broadly rounded valve apices. Valve face is minimally concave, as the axial area is lowered and the area around distal raphe elevated. The surface of the valve is mostly uneven due to many depressions, so the external shape of the areolae and the impression of irregular longitudinal rows depend on the extent of these valve ornamentations. Proximal raphe endings are unilaterally slightly deflected, expanded into small central pores. The shape of both the proximal and the distal raphe fissures is slightly asymmetrical. The morphological characteristics of Luticola rojkoviensis sp. nov. are remarkably similar to those of L. hustedtii Levkov, Metzeltin et A.Pavlov, L. ectorii Levkov, Metzeltin et A.Pavlov and L. acidoclinata Lange-Bertalot. The association of Luticola rojkoviensis sp. nov. with geoglossoid fungi and epiphytic cyanobacteria is discussed.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"34-43"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45461299","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}
J. Kociolek, Q. You, P. Yu, Yanling Li, Yanlu Wang, R. Lowe, Quanxi Wang
We describe a new genus of monoraphid diatom based on Achnanthidium ovatum T.Watanabe et Tuji in Watanabe et al., a species described originally from Japan. We encountered this species from Yunnan Province in the southwestern part to eastern China, as well as in Luding, Sichuan Province and Xianju, Zhejiang Province, in pristine lotic environments. The species differs from the genus Achnanthidium by being asymmetrical to the transapical axis and has a pseudoseptum at the poles of the interior of the raphe valve which is fused with each helictoglossa. Moreover, a distinct group of condensed striae can be found at the narrower pole ('footpole') of the raphe valve. This appears to be the only known genus of freshwater monoraphid diatoms that is restricted to a single continent.
我们以Watanabe et al.中的Achnanthidium ovatum t.w Watanabe et Tuji为基础，描述了一个原产于日本的单蚜硅藻新属。本种分布于中国西南至东部的云南省，以及四川泸定和浙江仙居的原始生态环境中。该种与Achnanthidium属的不同之处在于与跨根尖轴不对称，并且在中缝瓣内部的两极处有假隔膜，与每个螺旋舌融合。此外，在中缝瓣较窄的极(“足极”)处可以发现一组明显的压缩条纹。这似乎是唯一已知的淡水单蚜虫硅藻属，仅限于一个大陆。
{"title":"Description of Gomphothidium gen. nov., with light and scanning electron microscopy: A New Freshwater Monoraphid Diatom Genus from Asia","authors":"J. Kociolek, Q. You, P. Yu, Yanling Li, Yanlu Wang, R. Lowe, Quanxi Wang","doi":"10.5507/FOT.2020.011","DOIUrl":"https://doi.org/10.5507/FOT.2020.011","url":null,"abstract":"We describe a new genus of monoraphid diatom based on Achnanthidium ovatum T.Watanabe et Tuji in Watanabe et al., a species described originally from Japan. We encountered this species from Yunnan Province in the southwestern part to eastern China, as well as in Luding, Sichuan Province and Xianju, Zhejiang Province, in pristine lotic environments. The species differs from the genus Achnanthidium by being asymmetrical to the transapical axis and has a pseudoseptum at the poles of the interior of the raphe valve which is fused with each helictoglossa. Moreover, a distinct group of condensed striae can be found at the narrower pole ('footpole') of the raphe valve. This appears to be the only known genus of freshwater monoraphid diatoms that is restricted to a single continent.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"1-7"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45701427","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. Tuji, Haruyo Yamaguchi, Takafumi Kataoka, Mayumi Sato, T. Sano, Y. Niiyama
Our environmental DNA analysis identified Annamia-like operational taxonomic units (OTUs) from Lake Kasumigaura, Japan every summer season during the period from June 2012-May 2015. A strain from Lake Kasumigaura that agreed with an Annamia-like OTU (NIES-4383) was established with a cell-sorting machine. Based on the differences in morphology and 16S rRNA sequences, a new taxon is described: Annamia dubia Tuji, Yamaguchi et Niiyama sp. nov. A. dubia produces a microcystins that is also produced by A. toxica. Our 16S rRNA phylogenetical analysis reveals that the genus Annamia makes a monophyletic clade with the genera Geminocystis, Geminobacterium, and 'Cyanobacterium.' Although this clade agrees with Cyanobacteriaceae Komarek et al. (2014), this family is invalid based on the invalid genus Cyanobacterium and the type species Cyanobacterium stanieri. We propose the alternative name Geminocystaceae Tuji, Yamaguchi et Niiyama fam. nov. based on the genus Geminocystis.
我们的环境DNA分析在2012年6月至2015年5月期间，每年夏季都会从日本卡苏米高拉湖鉴定出类似Annamia的操作分类单元（OTU）。用细胞分选机建立了一种来自Kasumigaura湖的菌株，该菌株与Annamia样OTU一致（NIES-4383）。根据形态和16S rRNA序列的差异，描述了一个新的分类单元：Annamia dubia Tuji，Yamaguchi et Niiyama sp.nov.a.dubia产生一种微囊藻毒素，该毒素也由a.toxix产生。我们的16S rRNA系统发育分析表明，Annamia属与Geminocystis属、Geminobacterium属和“Cyanobacteria”属组成一个单系分支尽管该分支与蓝细菌科Komarek等人一致。（2014），但基于无效的蓝细菌属和模式种斯坦蓝细菌，该科是无效的。我们提出了另一个名称Geminocystacee Tuji，Yamaguchi et Niiyama fam。nov.基于Geminocystis属。
{"title":"Annamia dubia sp. nov. with a description of a new family, Geminocystaceae fam. nov. (Cyanobacteria)","authors":"A. Tuji, Haruyo Yamaguchi, Takafumi Kataoka, Mayumi Sato, T. Sano, Y. Niiyama","doi":"10.5507/FOT.2021.003","DOIUrl":"https://doi.org/10.5507/FOT.2021.003","url":null,"abstract":"Our environmental DNA analysis identified Annamia-like operational taxonomic units (OTUs) from Lake Kasumigaura, Japan every summer season during the period from June 2012-May 2015. A strain from Lake Kasumigaura that agreed with an Annamia-like OTU (NIES-4383) was established with a cell-sorting machine. Based on the differences in morphology and 16S rRNA sequences, a new taxon is described: Annamia dubia Tuji, Yamaguchi et Niiyama sp. nov. A. dubia produces a microcystins that is also produced by A. toxica. Our 16S rRNA phylogenetical analysis reveals that the genus Annamia makes a monophyletic clade with the genera Geminocystis, Geminobacterium, and 'Cyanobacterium.' Although this clade agrees with Cyanobacteriaceae Komarek et al. (2014), this family is invalid based on the invalid genus Cyanobacterium and the type species Cyanobacterium stanieri. We propose the alternative name Geminocystaceae Tuji, Yamaguchi et Niiyama fam. nov. based on the genus Geminocystis.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"100-109"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48987429","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}
E. Patova, I. Novakovskaya, N. Martynenko, E. Gusev, M. Kulikovskiy
This paper describes a new species from the Class Chlorophyceae, Mychonastes frigidus sp. nov., isolated from a cold-water mountain stream in the north of Russia (Subpolar Ural). The taxon is described using morphological and molecular methods. Mychonastes frigidus sp. nov. belongs to the group of species of the genus Mychonastes with spherical single cells. Comparison of ITS2 rDNA sequences and its secondary structures combined with the compensatory base changes approach confirms the separation between Mychonastes frigidus sp. nov and other species of the genus. Mychonastes frigidus sp. nov. represents a cryptic species that can only be reliably identified using molecular data.
{"title":"Mychonastes frigidus sp. nov. (Sphaeropleales/Chlorophyceae), a new species described from a mountain stream in the Subpolar Urals (Russia)","authors":"E. Patova, I. Novakovskaya, N. Martynenko, E. Gusev, M. Kulikovskiy","doi":"10.5507/FOT.2020.012","DOIUrl":"https://doi.org/10.5507/FOT.2020.012","url":null,"abstract":"This paper describes a new species from the Class Chlorophyceae, Mychonastes frigidus sp. nov., isolated from a cold-water mountain stream in the north of Russia (Subpolar Ural). The taxon is described using morphological and molecular methods. Mychonastes frigidus sp. nov. belongs to the group of species of the genus Mychonastes with spherical single cells. Comparison of ITS2 rDNA sequences and its secondary structures combined with the compensatory base changes approach confirms the separation between Mychonastes frigidus sp. nov and other species of the genus. Mychonastes frigidus sp. nov. represents a cryptic species that can only be reliably identified using molecular data.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"8-15"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44618915","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}
Unicellular cyanobacteria constitute a substantial, ecologically important part of freshwater and marine microflora. Solitary, elongated cyanobacterial cells without apparent slime envelopes and dividing in a single plane perpendicular to the longitudinal axis were traditionally classified into the genus Synechococcus. The type species originates from a freshwater benthic habitat while a number of other Synechococcus-like species were described from diverse environments. Morphologically similar, unicellular populations of "Synechococcus" belong to the most abundant oxygen evolving prokaryotes inhabiting freshwater and oceanic picoplanktic communities. Other species from extreme thermal habitats were described from temperatures over 70 °C. Recent molecular analyses, particularly the 16S rRNA gene and other multi-locus gene based phylogenies of Synechococcus-like species reveal the polyphyly and phylogenetic diversity of such simple cyanobacteria emphasizing the necessity of their accurate polyphasic taxonomic re-classification. To better understand the phylogeny of different Synechococcus-like species, we constructed a genome-derived phylogenetic tree using 133 cyanobacterial and eubacterial genomes as well as a 16S rRNA gene phylogenetic tree. Both trees indicate existence of deep splits between individual Synechococcus lineages corresponding with indistinct ecological and cytomorphological differences. The generic units derived from the traditional concept of the genus Synechococcus based on the combined traits and markers must be defined and validly described. The comparative taxonomic classification of phylogenetic clusters corresponding to various morphotypes and genotypes similar to the genus Synechococcus (Cyanobium, Parasynechococcus, Picosynechococcus, Prochlorococcus, Thermosynechococcus, Thermostichus) are discussed in the article.
{"title":"Phylogeny and taxonomy of Synechococcus-like cyanobacteria","authors":"J. Komárek, J. Johansen, J. Šmarda, O. Strunecký","doi":"10.5507/FOT.2020.006","DOIUrl":"https://doi.org/10.5507/FOT.2020.006","url":null,"abstract":"Unicellular cyanobacteria constitute a substantial, ecologically important part of freshwater and marine microflora. Solitary, elongated cyanobacterial cells without apparent slime envelopes and dividing in a single plane perpendicular to the longitudinal axis were traditionally classified into the genus Synechococcus. The type species originates from a freshwater benthic habitat while a number of other Synechococcus-like species were described from diverse environments. Morphologically similar, unicellular populations of \"Synechococcus\" belong to the most abundant oxygen evolving prokaryotes inhabiting freshwater and oceanic picoplanktic communities. Other species from extreme thermal habitats were described from temperatures over 70 °C. Recent molecular analyses, particularly the 16S rRNA gene and other multi-locus gene based phylogenies of Synechococcus-like species reveal the polyphyly and phylogenetic diversity of such simple cyanobacteria emphasizing the necessity of their accurate polyphasic taxonomic re-classification. To better understand the phylogeny of different Synechococcus-like species, we constructed a genome-derived phylogenetic tree using 133 cyanobacterial and eubacterial genomes as well as a 16S rRNA gene phylogenetic tree. Both trees indicate existence of deep splits between individual Synechococcus lineages corresponding with indistinct ecological and cytomorphological differences. The generic units derived from the traditional concept of the genus Synechococcus based on the combined traits and markers must be defined and validly described. The comparative taxonomic classification of phylogenetic clusters corresponding to various morphotypes and genotypes similar to the genus Synechococcus (Cyanobium, Parasynechococcus, Picosynechococcus, Prochlorococcus, Thermosynechococcus, Thermostichus) are discussed in the article.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"20 1","pages":"171-191"},"PeriodicalIF":2.2,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45525394","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}
QI Yang, Teng-Liang Liu, P. Yu, Junyi Zhang, J. Kociolek, Quanxi Wang, Q. You
We describe a new species of diatom, Psammodictyon taihuensis sp. nov., collected from the Taihu Basin, Jiangsu Province, China. There are several features of this diatom that suggest it should be included in the genus Psammodictyon, notably the possession of panduriform valves characterized by a longitudinal fold near the apical axis, coarsely areolate striae, and a keeled raphe system present on the valve margin. This species is distinct from others in the genus by its small size, being only 16.5-25.0 μm long and 10.0-12.5 μm wide in the central region, and with the widest valve being 10.5-13.5 μm in width. There are 8-11 distinct fibulae per 10 μm and the striae are composed of 18-22 coarse areolae per 10 μm. This is the first report of a freshwater member of the genus Psammodictyon in China, which expands the known geographical and ecological distributions of the genus and enhances our understanding of freshwater diatom diversity in China.
{"title":"A new freshwater Psammodictyon species in the Taihu Basin, Jiangsu Province, China","authors":"QI Yang, Teng-Liang Liu, P. Yu, Junyi Zhang, J. Kociolek, Quanxi Wang, Q. You","doi":"10.5507/fot.2020.005","DOIUrl":"https://doi.org/10.5507/fot.2020.005","url":null,"abstract":"We describe a new species of diatom, Psammodictyon taihuensis sp. nov., collected from the Taihu Basin, Jiangsu Province, China. There are several features of this diatom that suggest it should be included in the genus Psammodictyon, notably the possession of panduriform valves characterized by a longitudinal fold near the apical axis, coarsely areolate striae, and a keeled raphe system present on the valve margin. This species is distinct from others in the genus by its small size, being only 16.5-25.0 μm long and 10.0-12.5 μm wide in the central region, and with the widest valve being 10.5-13.5 μm in width. There are 8-11 distinct fibulae per 10 μm and the striae are composed of 18-22 coarse areolae per 10 μm. This is the first report of a freshwater member of the genus Psammodictyon in China, which expands the known geographical and ecological distributions of the genus and enhances our understanding of freshwater diatom diversity in China.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"20 1","pages":"144-151"},"PeriodicalIF":2.2,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43018365","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}
Mat dwelling species of cyanobacteria are diverse and integral to coastal marine sediment systems. Though observed throughout the globe, much of this diversity remains undescribed, especially on South Florida coast where cyanobacteria are pronounced. To help elucidate this diversity, one species of cyanobacteria from the marine sediments of South Florida was studied. Typical morphological features including uniseriate pseudofilaments with facultative intercellular gaps and cell division in one plane, transversely to the longer cell axis, indicated that the species belonged to the genus Johannesbaptistia De Toni. The combination of 16S rRNA gene and 16S-23S rRNA internal transcriber spacer (ITS), along with the diagnosable morphological characteristics suggest uniqueness from previously described species, thus supports the erection of the novel species Johannesbaptistia floridana sp. nov.
生活在垫子上的蓝藻种类繁多，是沿海海洋沉积物系统的组成部分。尽管在全球范围内都有观察到，但这种多样性的大部分仍然没有被描述，尤其是在蓝细菌明显的南佛罗里达海岸。为了帮助阐明这种多样性，研究了南佛罗里达州海洋沉积物中的一种蓝藻。典型的形态特征，包括具有兼性细胞间隙的单列假丝和在一个平面上的细胞分裂，横向于较长的细胞轴，表明该物种属于Johannesaptistia De Toni属。16S rRNA基因和16S-23S rRNA内部转录间隔区（ITS）的组合，以及可诊断的形态学特征，表明了与先前描述的物种的独特性，从而支持了新物种Johannesbatitia floridana sp.nov的建立。
{"title":"Johannesbaptistia floridana sp. nov. (Chroococcales, Cyanobacteria), a novel marine cyanobacterium from coastal South Florida (USA)","authors":"D. Berthold, Forrest W. Lefler, V. Werner, H. Iv","doi":"10.5507/fot.2020.008","DOIUrl":"https://doi.org/10.5507/fot.2020.008","url":null,"abstract":"Mat dwelling species of cyanobacteria are diverse and integral to coastal marine sediment systems. Though observed throughout the globe, much of this diversity remains undescribed, especially on South Florida coast where cyanobacteria are pronounced. To help elucidate this diversity, one species of cyanobacteria from the marine sediments of South Florida was studied. Typical morphological features including uniseriate pseudofilaments with facultative intercellular gaps and cell division in one plane, transversely to the longer cell axis, indicated that the species belonged to the genus Johannesbaptistia De Toni. The combination of 16S rRNA gene and 16S-23S rRNA internal transcriber spacer (ITS), along with the diagnosable morphological characteristics suggest uniqueness from previously described species, thus supports the erection of the novel species Johannesbaptistia floridana sp. nov.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"20 1","pages":"152-159"},"PeriodicalIF":2.2,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47556938","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}
E. Gusev, Y. Podunay, N. Martynenko, N. Shkurina, M. Kulikovskiy
A new species from Vietnam, Cryptomonas vietnamica sp. nov., is described based on morphological and molecular data. Six strains from different habitats were analyzed. Cryptomonas vietnamica is characterized by large cells up to 54 µm long, 30 µm wide and 20 µm thick, flattened in dorso-ventral plane and often twisted. Phylogenetic relationships inferred from nuclear small and large subunit ribosomal DNA sequences show that the new species forms a clade with Cryptomonas lundii, a rare taxon, described from Europe. Cryptomonas lundii is reported for the first time from Russia and second time since its initial description.
{"title":"Taxonomic studies of Cryptomonas lundii clade (Cryptophyta: Cryptophyceae) with description of a new species from Vietnam","authors":"E. Gusev, Y. Podunay, N. Martynenko, N. Shkurina, M. Kulikovskiy","doi":"10.5507/fot.2020.004","DOIUrl":"https://doi.org/10.5507/fot.2020.004","url":null,"abstract":"A new species from Vietnam, Cryptomonas vietnamica sp. nov., is described based on morphological and molecular data. Six strains from different habitats were analyzed. Cryptomonas vietnamica is characterized by large cells up to 54 µm long, 30 µm wide and 20 µm thick, flattened in dorso-ventral plane and often twisted. Phylogenetic relationships inferred from nuclear small and large subunit ribosomal DNA sequences show that the new species forms a clade with Cryptomonas lundii, a rare taxon, described from Europe. Cryptomonas lundii is reported for the first time from Russia and second time since its initial description.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"63 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41281958","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, Y. Maltsev, A. Glushchenko, E. Gusev, D. Kapustin, I. Kuznetsova, L. Frolova, J. Kociolek
Molecular investigation of genera Nupela and Brachysira is conducted using strains from Indonesia and Vietnam. New species from the genus Nupela indonesica sp. nov. is described using combined approach. Nupela lesothensis (Schoeman) Lange-Bertalot is investigated using molecular data too. Phylogenetic analysis shows that Nupela and Brachysira are not closest genera. Morphology of Nupela and it differences from Brachysira is discussed. The genus Nupela is differs from all other diatom taxa by having coalescent hymenes ouside of areolae but not inside. Facultative development of raphe between different Nupela species is discussed.
{"title":"Preliminary molecular phylogeny of the diatom genus Nupela with the description of a new species and consideration of the interrelationships of taxa in the suborder Neidiineae D.G. Mann sensu E.J. Cox","authors":"M. Kulikovskiy, Y. Maltsev, A. Glushchenko, E. Gusev, D. Kapustin, I. Kuznetsova, L. Frolova, J. Kociolek","doi":"10.5507/fot.2020.009","DOIUrl":"https://doi.org/10.5507/fot.2020.009","url":null,"abstract":"Molecular investigation of genera Nupela and Brachysira is conducted using strains from Indonesia and Vietnam. New species from the genus Nupela indonesica sp. nov. is described using combined approach. Nupela lesothensis (Schoeman) Lange-Bertalot is investigated using molecular data too. Phylogenetic analysis shows that Nupela and Brachysira are not closest genera. Morphology of Nupela and it differences from Brachysira is discussed. The genus Nupela is differs from all other diatom taxa by having coalescent hymenes ouside of areolae but not inside. Facultative development of raphe between different Nupela species is discussed.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"20 1","pages":"192-204"},"PeriodicalIF":2.2,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46332801","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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