Diatom Research最新文献_第3页

Names, diagnoses and ‘Dead Names’: the case of Synedra pelagica 名字，诊断和“死亡的名字”:上颌参的案例

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-04-03 DOI: 10.1080/0269249X.2023.2233515

David M. Williams

引用次数: 0

Davidharwoodia megaspina gen. et sp. nov. (Corethrales), a new fossil marine diatom genus from Mors, Jutland (early Eocene) Davidharwoodia megaspina gen. et sp. 11 . (Corethrales)，日特兰摩尔斯(早始新世)海洋硅藻属新化石

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-01-02 DOI: 10.1080/0269249X.2022.2159883

K. Abe, R. Jordan

引用次数: 0

Entomoneis grisslehamnensis, a New Diatom (Bacillariophyceae) from the Baltic Coast of Sweden with taxonomic and ecological notes on Entomoneis paludosa (W. Smith) Reimer 瑞典波罗的海沿岸一种新硅藻(硅藻科)&对paludosa (W. Smith) Reimer的分类和生态学注释

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-01-02 DOI: 10.1080/0269249X.2023.2215110

Adil Y. AL-HANDAL, Maja Mucko, P. Peharec Štefanić, A. Wulff

{"title":"Entomoneis grisslehamnensis, a New Diatom (Bacillariophyceae) from the Baltic Coast of Sweden with taxonomic and ecological notes on Entomoneis paludosa (W. Smith) Reimer","authors":"Adil Y. AL-HANDAL, Maja Mucko, P. Peharec Štefanić, A. Wulff","doi":"10.1080/0269249X.2023.2215110","DOIUrl":"https://doi.org/10.1080/0269249X.2023.2215110","url":null,"abstract":"The diatom genus Entomoneis includes species with panduriform frustules characterized by a bilobate, elevated keel, sigmoid raphe canal and numerous open, porous girdle bands. During a phytoplankton survey along the Baltic coast of Sweden, we observed numerous Entomoneis cells, some belonging to the well-known Entomoneis paludosa, while others remained unknown. Morphological and ultrastructural studies of the unknown species were performed with light microscopy (LM), scanning (SEM) and transmission (TEM) electron microscopy, and revealed a unique set of morphological characters. Live cells of Entomoneis grisslehamnensis sp. nov. contain one plate-like plastid and show various degrees of torsion about the apical axis. Microscopic features of cleaned frustules are discussed in comparison with similar species. Most importantly, every 2nd to 5th virga is strongly elevated, uniseriate striae are composed of quadrangular areolae with finely perforated hymenes; the winged keel with a discernible raphe canal is structurally strengthened by raphe fibulae with a flattened wing area, and the main part of the valve bulges towards the margins; striation is decussate on the wings and there is one row of raphe canal areolae at the central area. In addition to describing this new species of an underappreciated, yet cosmopolitan diatom genus, we contribute to the taxonomy of E. paludosa with LM, SEM and TEM details, some of which were not sufficiently noted in original descriptions or re-examination of type material and other specimens made by Dalu et al. [2015. A re-examination of the type material of Entomoneis paludosa (W. Smith) Reimer and its morphology and distribution in African waters. Fottea 15: 11–25] and Long et al. [2022. Ultrastructure of three species of Entomoneis (Bacillariophyta) from Lake Qinghai of China, with reference to the external areola occlusions. PhytoKeys 189: 29–50. doi:10.3897/phytokeys.189.78149].","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43328032","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}

引用次数: 0

Studies on type material from Kützing’s diatom collection VII: Achnanthes capensis Kützing, Achnanthes capensis ß [var.] multiarticulata Kützing and ‘Achnanthes striata Suhr’ Kützing硅藻群模式物质的研究Ⅶ：刺叶Achnanthes capensis Kütsing、刺叶Achinthes capensisß[var]multi-acteta Kütz和‘条纹Achnanthes striata Suhr’

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-01-02 DOI: 10.1080/0269249X.2023.2173308

Kensuke Toyoda, David M. Williams, E. Cox, Tanja M. Schuster

引用次数: 0

Diversity and distribution of spine-bearing species of Pinnularia in eastern North America 北美东部松属带脊物种的多样性和分布

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-01-02 DOI: 10.1080/0269249X.2023.2208136

Marina G. Potapova, Micaela H. Kersey, Laura L. Aycock

{"title":"Diversity and distribution of spine-bearing species of Pinnularia in eastern North America","authors":"Marina G. Potapova, Micaela H. Kersey, Laura L. Aycock","doi":"10.1080/0269249X.2023.2208136","DOIUrl":"https://doi.org/10.1080/0269249X.2023.2208136","url":null,"abstract":"Six species of large-celled Pinnularia Ehrenberg from lakes of eastern North America, P. dariana (A.W.F. Schmidt) Mills, P. alabamae Krammer, P. bihastata (A. Mann) R.M. Patrick, P. torta (A. Mann) R.M. Patrick, P. rexlowei sp. nov. and P. spinifera sp. nov. are investigated with light and scanning electron microscopy. All six species are shown to possess marginal spines, a trait sporadically encountered in Pinnularia and generally rare in raphid diatoms. Besides having spines, the six species differ in their frustular morphology, including appearance and position of spines. We summarize data on their ecology and distribution using a set of 702 sediment core samples from 424 lakes from eastern USA and Canada. Pinnularia rexlowei is only known from Quaternary lacustrine deposits in the State of Connecticut and from the surface and subfossil sediments of two lakes in northeastern USA. The other five species are relatively common, and at least one species of spine-bearing Pinnularia was found in 34% of studied lakes. Pinnularia dariana and P. torta reach as far north as Labrador, while P. alabamae, P. bihastata and P. spinifera were only encountered south of Canada. Pinnularia alabamae and P. spinifera are characteristic for lakes with relatively soft and slightly acidic water, while P. bihastata, P. dariana and P. torta are found in a wider range of physico-chemical conditions, including alkaline and eutrophic lakes.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46563734","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}

引用次数: 0

On the enigmatic diatom Rhizosolenia dubia, its relationship to Pseudopyxilla and Proboscia, and description of a new species, Proboscia pinocchioi sp. nov. 关于神秘硅藻根管藻(Rhizosolenia dubia)及其与pseudoyxilla和Proboscia的关系，以及一新种Proboscia pinochoi sp. nov的描述。

IF 1.8 3区生物学

Diatom Research Pub Date : 2023-01-02 DOI: 10.1080/0269249X.2022.2154280

K. Abe, R. Jordan

{"title":"On the enigmatic diatom Rhizosolenia dubia, its relationship to Pseudopyxilla and Proboscia, and description of a new species, Proboscia pinocchioi sp. nov.","authors":"K. Abe, R. Jordan","doi":"10.1080/0269249X.2022.2154280","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2154280","url":null,"abstract":"Pyxilla? dubia was originally described from Jutland, but subsequently transferred to Pseudopyxilla. However, the discovery, over eighty years apart, of two enigmatic specimens with tubular heterovalvate frustules featuring a Pseudopyxilla dubia valve at one end and a rhizosolenioid valve at the other end resulted in a new combination, Rhizosolenia dubia. Herein, we document in detail the valve morphology of specimens observed in early Eocene samples from Mors (Jutland) using light and scanning electron microscopy. Our results reveal the presence of both valve types (but never as heterovalvate frustules). The rhizosolenioid valves possess a proboscis with three spinulae at the tip (the middle one being very extensive), a longitudinal slit on the dorsal side, and claspers on the basal part of the domed valve on the ventral side. Our results suggest that the Pseudopyxilla frustule is the resting spore of a yet, unknown diatom, while the ‘rhizosolenioid’ valve represents the vegetative phase of a new species, Proboscia pinocchioi sp. nov. From an evolutionary standpoint, P. pinocchioi lacks the longitudinal ridges of the cretacea lineage, but bears the characteristic polar spinulae and limited pore distribution of the barboi lineage. However, P. pinocchioi surprisingly possesses claspers (normally observed only in the alata lineage) – representing the oldest evidence of claspers in rhizosolenioid diatoms.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59426376","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}

引用次数: 1

Paralia flatoniana sp. nov., a new species from the late Eocene of Texas with discussion on ecology and initial valves 德克萨斯州晚始新世一新种flatoniana sp. nov.——兼论生态学和初始阀

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-10-02 DOI: 10.1080/0269249X.2022.2141345

D. Winter, T. Yancey

{"title":"Paralia flatoniana sp. nov., a new species from the late Eocene of Texas with discussion on ecology and initial valves","authors":"D. Winter, T. Yancey","doi":"10.1080/0269249X.2022.2141345","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2141345","url":null,"abstract":"A new Paralia Heiberg species, Paralia flatoniana sp. nov., is documented from a late Eocene diatomite and mudstone deposit in east central Texas. Paralia represents up to 63% of the assemblage in the diatomite samples and 34% in the mudstone. Numerous Paralia initial valves are present adding an unusual component to this assemblage as they are infrequently reported from samples containing populations of fossil Paralia. A third valve type observed attached to Paralia chains is also illustrated and discussed. Intact chains are common and preservation of the frustules is very good with limited indication of dissolution or transport. An average valve diameter of 19.0 µm (7.1–37.7 µm range), the presence of numerous initial valves and preservation of fine morphological structures suggest an environment with often high in situ productivity rather than a transported assemblage. Morphologically similar species Paralia crenulata and Paralia thybergii share many mantle characteristics with P. flatoniana while the valve face details of Paralia fausta are similar. Paleogeography and – ecology of the Eocene Gulf of Mexico and volcanism to the west provided a temperate coastal nutrient-rich shelf environment favourable for Paralia.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44925868","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}

引用次数: 0

Morphological variability and genetic marker stability of 16 monoclonal pennate diatom strains under medium-term culture 16株单克隆pennate硅藻中期培养的形态变异和遗传标记稳定性

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-10-02 DOI: 10.1080/0269249X.2022.2141346

Heba Mohamad, Demetrio Mora, O. Skibbe, Nélida Abarca, Verena Deutschmeyer, N. Enke, Wolf-Henning Kusber, J. Zimmermann, R. Jahn

{"title":"Morphological variability and genetic marker stability of 16 monoclonal pennate diatom strains under medium-term culture","authors":"Heba Mohamad, Demetrio Mora, O. Skibbe, Nélida Abarca, Verena Deutschmeyer, N. Enke, Wolf-Henning Kusber, J. Zimmermann, R. Jahn","doi":"10.1080/0269249X.2022.2141346","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2141346","url":null,"abstract":"Monoclonal diatom strains are the basis for integrative taxonomical studies combining molecular and morphological data for better taxonomic resolution and identification. The identification of diatoms, based on morphological features of the frustule, is difficult due to the variability of characters within and amongst species. The longer the cultivation time, the more cell size is reduced during asexual reproduction. Many divisions of the cell complicate identification as morphological characters of the frustule change at different rates in different taxa and teratologies can develop. Morphological variability raises the question whether the investigated genetic markers are stable over the cultivation time span. Sixteen monoclonal pennate diatom strains, identified as 10 different species in six genera, were cultivated for up to 18 or 24 months. It was shown that molecular data for the 18S-V4, rbcL, and psbA markers were stable for the entire cultivation time of all taxa. Images of the valves of the strains were taken every six months and examined morphometrically. Depending on the time since the start of the cultures, the morphological features showed high variability, particularly in length and shape, whereas width and number of striae, costae or fibulae were more stable, depending on the taxon and strain. A limited time span and good culture conditions seem to be prerequisite to avoid the production of teratological frustules. The results of parallel cultures in a unique experimental design are compared to observations from the literature dealing with single strains or special cognitive interests.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48211347","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}

引用次数: 2

Determining geographical range and alien status in diatoms: three instructive case histories of species newly recorded in the British Isles, including a non-native marine species from the Pacific, Diademoides luxuriosa 确定硅藻的地理范围和外来地位：不列颠群岛新记录物种的三个有指导意义的案例历史，包括来自太平洋的非本土海洋物种，豪华硅藻

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-08-16 DOI: 10.1080/0269249x.2022.2078428

D. Mann

引用次数: 0

Taxonomy and Valve Ultrastructure of New and Interesting Freshwater Fossil Diatoms (Bacillariophyta) of Miocene age from the Espanola Formation of New Mexico, USA. I. Ontogeny of Tetracyclus stelloides sp. nov., with Comments on ‘Accepted Names’ and Hustedt's Concepts of ‘Convergence’ and ‘Miserable Forms’ 美国新墨西哥州Espanola组中新世淡水硅藻化石(硅藻门)的分类和阀超微结构。1 .星形四环虫的个体发生——兼评“公认名称”和Hustedt的“趋同”和“悲惨形态”概念

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-08-09 DOI: 10.1080/0269249x.2022.2087742

J.P. Kociolek, D.M. Williams, A. Danz

引用次数: 0