Pub Date : 2018-11-01DOI: 10.7872/crya/v39.iss4.2018.409
Hélène Dubrasquet, Janette Reyes, R. P. Sanchez, N. Valdivia, M. Guillemin
Résumé La flore marine de la zone Antarctique est supposée bien connue car relativement peu d' espèces y sont observées par rapport à d'autres régions du monde. En utilisant la taxonomie traditionnelle combinée aux outils moléculaires, nous avons étudié la diversité et biogéographie des communautés de macroalgues rouges le long de la côte Ouest de la Péninsule Antarctique (WAP) et des îles Shetlands du Sud (SShs) en considérant un gradient bathymétrique. Nous avons également comparé nos deux méthodes d'identification en terme de précision et de nombre de taxa identifiés. Nos résultats ont démontré de faibles et homogènes niveaux de diversité à l'échelle de la zone d'étude comme à échelle locale, avec au total environ 50 taxa identifiés. Nous avons également détecté trois complexes d'espèces cryptiques chez les genres Callophyllis, Curdiea et Georgiella, et amélioré l'identification de nos spécimens puisque 98% ont été identifiés jusqu'à l'espèce grâce grace aux outils moléculaires. Nos résultats ont aussi permis de révéler des différences significatives entre les assemblages de macroalgues rouges appartenant à trois sub-régions, correspondant à des latitudes différentes: SShs et partie Nord de la WAP (≈63°S), la partie centrale de la WAP (≈64°S) et la partie Centre-Sud de la WAP (≈67°S). Nos sub-régions ne correspondent pas à la séparation classique entre SShs/WAP proposée dans les études antérieures, et suggèrent d'une part, que le détroit de Bransfield n'est pas une barrière biogéographique forte pour les macroalgues rouge et d'autre part, que la dynamique actuelle et passée de la couverture de glace a pu jouer un rôle déterminant dans la distribution actuelle des assemblages de macroalgues rouges. Finalement, notre travail a permis de construire une banque de données génétiques associée à un herbier de collection de spécimens, et va permettre d'appuyer des travaux futurs pour mieux comprendre la diversité et distribution des communautés d'algues rouges dans la zone d'étude. Abstract The Antarctic marine flora is well known as a flora composed of relatively few species in comparison with other marine realms. Using molecular taxonomy as complementary tool for traditional taxonomy, we studied red macroalgal diversity and biogeography along the Western Antarctic Peninsula (WAP) and South Shetlands Islands (SShs) coasts and across a bathymetric gradient; in addition, we compared both methods of identification in terms of accuracy and number of observed taxa. Our results show low diversity levels at the regional and local scales, with around 50 taxa registered in total. Molecular tools allowed us to detect putative cryptic species within the genera Callophyllis, Curdiea and Georgiella, and to identify 98% of our specimens at species level. Our results also allowed us to identify significant differences between red macroalgal assemblages of three distinct biogeographic sub-regions: SShs and Northern part of the WAP (at ≈63°S), Central part of the
南极地区的海洋植物群被认为是众所周知的，因为与世界其他地区相比，在那里观察到的物种相对较少。利用传统分类学结合分子工具，我们研究了南极半岛西海岸(WAP)和南设得兰群岛(SShs)红大型藻类群落的多样性和生物地理，并考虑了水深梯度。我们还比较了两种鉴定方法的准确性和鉴定率的数量。我们的结果显示，在研究区域和局部范围内，多样性水平较低且均匀，共鉴定出约50个类群。我们还在Callophyllis属、Curdiea属和Georgiella属中检测了3个隐种复合体，并改进了标本的鉴定，利用分子工具鉴定了98%的物种。我们的结果还揭示了WAP的SShs和北部(≈63°S)、WAP的中部(≈64°S)和WAP的中南部(≈67°S)三个亚区域的大型红藻组合之间的显著差异。分离我们sub-régions并不符合经典SShs / WAP之间拟议的早期研究中,一方面表明,海峡Bransfield并不强大的生物地理屏障,对于红藻和另一方面,当前的势头,并从冰盖中起到了决定性的作用,组件的当前红藻的分布。最后，我们的工作建立了一个与标本采集植物标本室相关的遗传数据库，并将支持未来更好地了解研究区域红藻群落的多样性和分布的工作。= =地理= =根据美国人口普查，该地区的总面积为，其中土地和(2.641平方公里)水。利用分子分类学作为传统分类学的补充工具，我们研究了西南极半岛(WAP)和南设得兰群岛(SShs)沿岸和跨水深梯度的红色大型藻类多样性和生物地理学;此外，我们还比较了两种鉴定方法的准确性和观察到的比率数量。我们的结果显示，在区域和地方尺度上的多样性水平很低，总共记录了大约50个类群。= =地理= =根据美国人口普查，这个县的面积为，其中土地面积为，其中土地面积为。我们的研究结果还使我们能够确定三个不同生物地理子区域的大藻红组合之间的显著差异:WAP的SShs和北部部分(at≈63°S)、WAP的中部部分(at≈64°S)和WAP的中南部部分(at≈67°S)。Our sub-regions do not to the”,相当于分离SShs / WAP in前人权研究所与选择》that the Bransfield海峡is not a strong地理隔离for red macroalgae。由于我们的三个次区域对应三个纬度水平，我们认为过去和现在的海冰扰动动态可能影响了观察到的红藻群落的差异。我们认为，在本工作中建立与代金券标本相关的可访问遗传数据集将有利于今后对该区域大型藻类多样性和分布的研究。
{"title":"Molecular-Assisted Revision of Red Macroalgal Diversity and Distribution along the Western Antarctic Peninsula and South Shetland Islands","authors":"Hélène Dubrasquet, Janette Reyes, R. P. Sanchez, N. Valdivia, M. Guillemin","doi":"10.7872/crya/v39.iss4.2018.409","DOIUrl":"https://doi.org/10.7872/crya/v39.iss4.2018.409","url":null,"abstract":"Résumé \u0000 La flore marine de la zone Antarctique est supposée bien connue car relativement peu d' espèces y sont observées par rapport à d'autres régions du monde. En utilisant la taxonomie traditionnelle combinée aux outils moléculaires, nous avons étudié la diversité et biogéographie des communautés de macroalgues rouges le long de la côte Ouest de la Péninsule Antarctique (WAP) et des îles Shetlands du Sud (SShs) en considérant un gradient bathymétrique. Nous avons également comparé nos deux méthodes d'identification en terme de précision et de nombre de taxa identifiés. Nos résultats ont démontré de faibles et homogènes niveaux de diversité à l'échelle de la zone d'étude comme à échelle locale, avec au total environ 50 taxa identifiés. Nous avons également détecté trois complexes d'espèces cryptiques chez les genres Callophyllis, Curdiea et Georgiella, et amélioré l'identification de nos spécimens puisque 98% ont été identifiés jusqu'à l'espèce grâce grace aux outils moléculaires. Nos résultats ont aussi permis de révéler des différences significatives entre les assemblages de macroalgues rouges appartenant à trois sub-régions, correspondant à des latitudes différentes: SShs et partie Nord de la WAP (≈63°S), la partie centrale de la WAP (≈64°S) et la partie Centre-Sud de la WAP (≈67°S). Nos sub-régions ne correspondent pas à la séparation classique entre SShs/WAP proposée dans les études antérieures, et suggèrent d'une part, que le détroit de Bransfield n'est pas une barrière biogéographique forte pour les macroalgues rouge et d'autre part, que la dynamique actuelle et passée de la couverture de glace a pu jouer un rôle déterminant dans la distribution actuelle des assemblages de macroalgues rouges. Finalement, notre travail a permis de construire une banque de données génétiques associée à un herbier de collection de spécimens, et va permettre d'appuyer des travaux futurs pour mieux comprendre la diversité et distribution des communautés d'algues rouges dans la zone d'étude. Abstract \u0000 The Antarctic marine flora is well known as a flora composed of relatively few species in comparison with other marine realms. Using molecular taxonomy as complementary tool for traditional taxonomy, we studied red macroalgal diversity and biogeography along the Western Antarctic Peninsula (WAP) and South Shetlands Islands (SShs) coasts and across a bathymetric gradient; in addition, we compared both methods of identification in terms of accuracy and number of observed taxa. Our results show low diversity levels at the regional and local scales, with around 50 taxa registered in total. Molecular tools allowed us to detect putative cryptic species within the genera Callophyllis, Curdiea and Georgiella, and to identify 98% of our specimens at species level. Our results also allowed us to identify significant differences between red macroalgal assemblages of three distinct biogeographic sub-regions: SShs and Northern part of the WAP (at ≈63°S), Central part of the","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"35 1","pages":"409 - 429"},"PeriodicalIF":1.3,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80484261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.349
C. Lobban
Abstract Two new curved species and a new record of a straight species are reported; neither new species has the craticular bars seen in the generitype. C. desportesiae resembles C. guamensis and C. riddleae in size and number of plastids (2 pairs) but has much finer striae (46–50 in 10 µm). C. leandrei has multiple plastids and is very long, like C. koenigii but more slender and with rectangular rather than circular areolae. Valvocopulae of this species are described for the first time in Climaconeis spp., which otherwise show no distinction among copulae. A straight species, provisionally identified as C. scalaris, is reported for the first time from tropical waters. An updated key to the 18 known species is provided.
{"title":"Climaconeis desportesiae and C. leandrei (Bacillariophyta, Berkeleyaceae), Two New Curved Species from Guam, Western Pacific","authors":"C. Lobban","doi":"10.7872/crya/v39.iss3.2018.349","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.349","url":null,"abstract":"Abstract Two new curved species and a new record of a straight species are reported; neither new species has the craticular bars seen in the generitype. C. desportesiae resembles C. guamensis and C. riddleae in size and number of plastids (2 pairs) but has much finer striae (46–50 in 10 µm). C. leandrei has multiple plastids and is very long, like C. koenigii but more slender and with rectangular rather than circular areolae. Valvocopulae of this species are described for the first time in Climaconeis spp., which otherwise show no distinction among copulae. A straight species, provisionally identified as C. scalaris, is reported for the first time from tropical waters. An updated key to the 18 known species is provided.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"4 1","pages":"349 - 363"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83068915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.313
O. Necchi, Douglas de Castro Agostinho, M. L. Vis
Abstract In recent years, sections of the paraphyletic genus Batrachospermum have been investigated using DNA sequence data, as well as morphology and some have been raised to genera in order to resolve this paraphylly. The species of Batrachospermum section Virescentia form a well-supported clade and we propose the raising of this section to the genus Virescentia stat. nov. In addition, we re-evaluated the characters used to circumscribe species by reexamination of type specimens and new collections in historically important areas. Of the eleven previously accepted species, we recognize five species and a new species is proposed as follows: V. crispata, V. gulbenkiana (synomyms V. azeredoi and V. ferreri), V. helminthosa (type species), V. viride-americana sp. nov., V. viride-brasiliensis and V. vogesiaca. The species are circumscribed on the basis of morphological characteristics (shape of fascicles, occurrence of secondary fascicles, disposition of carpogonial branches and size of carpogonia), geographic distribution, and DNA sequence data (rbcL and COI-5P). Descriptions, identification key and photomicrographs are presented for each recognized species. Two potential species from Japan based on DNA sequence data remained undescribed due to lack of voucher specimens for morphological observation. Other species previously assigned to the section Virescentia are referred to other genera of Batrachospermales based on morphology (disposition of carpogonial branches, shape of trichogynes, types of gonimoblast filaments and arrangement of carposporophytes).
{"title":"Revision of Batrachospermum Section Virescentia (Batrachospermales, Rhodophyta) with the Establishment of the New Genus, Virescentia Stat. nov.","authors":"O. Necchi, Douglas de Castro Agostinho, M. L. Vis","doi":"10.7872/crya/v39.iss3.2018.313","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.313","url":null,"abstract":"Abstract \u0000 In recent years, sections of the paraphyletic genus Batrachospermum have been investigated using DNA sequence data, as well as morphology and some have been raised to genera in order to resolve this paraphylly. The species of Batrachospermum section Virescentia form a well-supported clade and we propose the raising of this section to the genus Virescentia stat. nov. In addition, we re-evaluated the characters used to circumscribe species by reexamination of type specimens and new collections in historically important areas. Of the eleven previously accepted species, we recognize five species and a new species is proposed as follows: V. crispata, V. gulbenkiana (synomyms V. azeredoi and V. ferreri), V. helminthosa (type species), V. viride-americana sp. nov., V. viride-brasiliensis and V. vogesiaca. The species are circumscribed on the basis of morphological characteristics (shape of fascicles, occurrence of secondary fascicles, disposition of carpogonial branches and size of carpogonia), geographic distribution, and DNA sequence data (rbcL and COI-5P). Descriptions, identification key and photomicrographs are presented for each recognized species. Two potential species from Japan based on DNA sequence data remained undescribed due to lack of voucher specimens for morphological observation. Other species previously assigned to the section Virescentia are referred to other genera of Batrachospermales based on morphology (disposition of carpogonial branches, shape of trichogynes, types of gonimoblast filaments and arrangement of carposporophytes).","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"95 1","pages":"313 - 338"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80107522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.293
A. Sfriso, M. Wolf, I. Moro, A. Sfriso, A. Buosi, M. Verlaque
Abstract On the basis of bibliographical, morphological and molecular studies (SSU rDNA), the reinstatement of species rank for Chaetomorpha stricta Schiffner, a poorly known Mediterranean endemic species described in the early 20th century, is proposed. Previously reduced to a posterior heterotypic synonym of C. linum (O.F. Müller) Kützing, C. stricta clearly differs from the latter by its small, light green, free-living filaments entangled in dense masses, the cells 0.5 to 1.6 (rarely 2) times as long as broad, with cell walls lamellate and broad up to 75–90 μm thick, and by molecular data. Chaetomorpha stricta was rediscovered, in May 2011, in oligotrophic clear waters of a closed fishing pond in the Valle Cavallino (northern basin of the Venice Lagoon). A critical review of Chaetomorpha taxa reported in the Mediterranean Sea and a taxonomic key to the Mediterranean taxa currently accepted are presented.
摘要基于文献、形态学和分子生物学研究(SSU rDNA)，对20世纪初发现的地中海特有种——毛茛(Chaetomorpha stricta Schiffner)进行了恢复种级的研究。C. stricta先前被认为是C. linum (O.F. m ller) k tzing的后异型同质物，其分子数据与后者明显不同，其小的，浅绿色的，自由生活的细丝缠绕在密集的团块中，细胞长0.5至1.6倍(很少2)，细胞壁片状，宽达75-90 μm厚。2011年5月，在Cavallino山谷(威尼斯泻湖北部盆地)一个封闭渔池的贫营养清澈水域中重新发现了Chaetomorpha stricta。本文综述了地中海Chaetomorpha分类群的研究进展，并提出了地中海Chaetomorpha分类群的分类关键。
{"title":"Rediscovery of a Forgotten Mediterranean Chaetomorpha Species in the Venice Lagoon (North Adriatic Sea): Chaetomorpha stricta Schiffner (Cladophorales, Chlorophyta)","authors":"A. Sfriso, M. Wolf, I. Moro, A. Sfriso, A. Buosi, M. Verlaque","doi":"10.7872/crya/v39.iss3.2018.293","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.293","url":null,"abstract":"Abstract \u0000 On the basis of bibliographical, morphological and molecular studies (SSU rDNA), the reinstatement of species rank for Chaetomorpha stricta Schiffner, a poorly known Mediterranean endemic species described in the early 20th century, is proposed. Previously reduced to a posterior heterotypic synonym of C. linum (O.F. Müller) Kützing, C. stricta clearly differs from the latter by its small, light green, free-living filaments entangled in dense masses, the cells 0.5 to 1.6 (rarely 2) times as long as broad, with cell walls lamellate and broad up to 75–90 μm thick, and by molecular data. Chaetomorpha stricta was rediscovered, in May 2011, in oligotrophic clear waters of a closed fishing pond in the Valle Cavallino (northern basin of the Venice Lagoon). A critical review of Chaetomorpha taxa reported in the Mediterranean Sea and a taxonomic key to the Mediterranean taxa currently accepted are presented.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"48 1","pages":"293 - 312"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80373333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.269
Z. Belattmania, A. Chaouti, A. Reani, M. Machado, A. Engelen, E. Serrão, B. Sabour
Abstract The diversity and structure of epiphytic macrofaunal assemblages on the introduced invasive brown macroalga Sargassum muticum and native fucoids (Bifurcaria bifurcata, Cystoseira humilis, Cystoseira tamariscifolia and Sargassum vulgare) were compared over a 1-year period in intertidal rockpools on the Atlantic coast of Morocco. In comparison with the epiphytic fauna associated to other macroalgae from European shores, we found that the associated epiphytic macrofauna was moderately diverse (H'<3 bit) and was mainly dominated by gastropods and crustaceans. The most abundant taxa were the isopod Dynamene bidentata and the gastropods Steromphala umbilicalis and Steromphala pennanti. The epiphytic macrofauna community structure differed slightly between the invader and the natives along the year. There was significant temporal variation in the total number of individuals of epiphytic macrofauna per thallus dry weight for the associated epifauna with the highest abundance found on C. tamariscifolia in the spring. The composition of the epiphytic macrofauna on each macroalga species was fairly constant over time. Overall, our results demonstrated that the mobile epiphytic macrofauna on this rocky area showed low macroalgal specificity. They also revealed that the invader S. muticum supports similar epiphytic macrofaunal communities as the native brown macroalgae and provides an additional appropriate habitat for a generalist associated epiphytic macrofauna.
{"title":"Similar Epiphytic Macrofauna Inhabiting the Introduced Sargassum muticum and Native Fucoids on the Atlantic Coast of Morocco","authors":"Z. Belattmania, A. Chaouti, A. Reani, M. Machado, A. Engelen, E. Serrão, B. Sabour","doi":"10.7872/crya/v39.iss3.2018.269","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.269","url":null,"abstract":"Abstract \u0000 The diversity and structure of epiphytic macrofaunal assemblages on the introduced invasive brown macroalga Sargassum muticum and native fucoids (Bifurcaria bifurcata, Cystoseira humilis, Cystoseira tamariscifolia and Sargassum vulgare) were compared over a 1-year period in intertidal rockpools on the Atlantic coast of Morocco. In comparison with the epiphytic fauna associated to other macroalgae from European shores, we found that the associated epiphytic macrofauna was moderately diverse (H'<3 bit) and was mainly dominated by gastropods and crustaceans. The most abundant taxa were the isopod Dynamene bidentata and the gastropods Steromphala umbilicalis and Steromphala pennanti. The epiphytic macrofauna community structure differed slightly between the invader and the natives along the year. There was significant temporal variation in the total number of individuals of epiphytic macrofauna per thallus dry weight for the associated epifauna with the highest abundance found on C. tamariscifolia in the spring. The composition of the epiphytic macrofauna on each macroalga species was fairly constant over time. Overall, our results demonstrated that the mobile epiphytic macrofauna on this rocky area showed low macroalgal specificity. They also revealed that the invader S. muticum supports similar epiphytic macrofaunal communities as the native brown macroalgae and provides an additional appropriate habitat for a generalist associated epiphytic macrofauna.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"22 1","pages":"269 - 292"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83822893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.365
J. Kociolek, M. Kulikovskiy, I. Kuznetsova, A. Glushchenko, C. Solak
Abstract We describe as new to science six new species of the diatom genus Gomphonema Ehrenberg from Lake Baikal, based on light and scanning electron microscope observations. The six species are morphologically similar to G. ventricosum, a northern European taxon known mostly from Scotland, Scandinavia and other Baltic countries, though it has been recognized also from North America. The six species are similar to G. ventricosum W. Gregory in the structure of the external occlusions over the areolae. The species also have prominent septa and pseudosepta, which distinguishes them from other species of the genus. They are distinguished from one another in the shapes and sizes of the valves. This group of closely related species may correspond to a species flock, a phenomenon in freshwater diatoms that is known from ancient lakes and flowing water systems. Further research is needed to confirm the monophyly of this group, and either support or challenge the idea of them representing a species flock.
{"title":"A Putative Species Flock in the Diatom Genus Gomphonema Ehrenberg (Bacillariophyta: Gomphonemataceae) from Lake Baikal, Russia: Description of Six New Species Similar to G. ventricosum W. Gregory","authors":"J. Kociolek, M. Kulikovskiy, I. Kuznetsova, A. Glushchenko, C. Solak","doi":"10.7872/crya/v39.iss3.2018.365","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.365","url":null,"abstract":"Abstract \u0000 We describe as new to science six new species of the diatom genus Gomphonema Ehrenberg from Lake Baikal, based on light and scanning electron microscope observations. The six species are morphologically similar to G. ventricosum, a northern European taxon known mostly from Scotland, Scandinavia and other Baltic countries, though it has been recognized also from North America. The six species are similar to G. ventricosum W. Gregory in the structure of the external occlusions over the areolae. The species also have prominent septa and pseudosepta, which distinguishes them from other species of the genus. They are distinguished from one another in the shapes and sizes of the valves. This group of closely related species may correspond to a species flock, a phenomenon in freshwater diatoms that is known from ancient lakes and flowing water systems. Further research is needed to confirm the monophyly of this group, and either support or challenge the idea of them representing a species flock.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"21 1","pages":"365 - 388"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86162419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.7872/crya/v39.iss3.2018.339
L. Gall, Delphine Gey, A. Vergés
Abstract The rare endemic Mediterranean alga Kallymenia spathulata was collected at Nice and Saint Raphael in June 2013 during a survey conducted along the French Mediterranean coast between Menton and Toulon (French Riviera). DNA barcode sequences (COI-5P) generated from the five collected specimens were identical and allied with Felicinia marginata, another Mediterranean endemic that is classified within the Halymeniaceae (Halymeniales) whereas the genus Kallymenia is representative of the Kallymeniaceae (Gigartinales). We further confirmed the alliance of K. spathulata with Felicinia marginata by conducting phylogenetic analyses inferred by combined genes including Cox1, rbcL and LSU. Unfortunately, none of the specimens were fertile, precluding emending the description of the reproductive anatomy of this species. In light of our phylogenies, we propose the novel combination Felicinia spathulata. The genus Felicinia now comprises two species, both endemic to the Mediterranean Sea.
{"title":"Insights into the Rare Mediterranean Endemic Kallymenia spathulata: DNA Phylogenies Resolve This Species as Halymeniaceae (Halymeniales) Rather than Kallymeniaceae (Gigartinales), with the Proposal of Felicinia spathulata comb. nov.","authors":"L. Gall, Delphine Gey, A. Vergés","doi":"10.7872/crya/v39.iss3.2018.339","DOIUrl":"https://doi.org/10.7872/crya/v39.iss3.2018.339","url":null,"abstract":"Abstract \u0000 The rare endemic Mediterranean alga Kallymenia spathulata was collected at Nice and Saint Raphael in June 2013 during a survey conducted along the French Mediterranean coast between Menton and Toulon (French Riviera). DNA barcode sequences (COI-5P) generated from the five collected specimens were identical and allied with Felicinia marginata, another Mediterranean endemic that is classified within the Halymeniaceae (Halymeniales) whereas the genus Kallymenia is representative of the Kallymeniaceae (Gigartinales). We further confirmed the alliance of K. spathulata with Felicinia marginata by conducting phylogenetic analyses inferred by combined genes including Cox1, rbcL and LSU. Unfortunately, none of the specimens were fertile, precluding emending the description of the reproductive anatomy of this species. In light of our phylogenies, we propose the novel combination Felicinia spathulata. The genus Felicinia now comprises two species, both endemic to the Mediterranean Sea.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"9 1","pages":"339 - 347"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84866715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-23DOI: 10.7872/crya/v39.iss2.2018.255
C. E. Wetzel, J. Kociolek
Abstract A new monotypic diatoms genus from Brazil is described based on gatherings and descriptions from the Amazon made by Hustedt in the early 50's. Burliganiella gen. nov. is described using light and scanning electron microscope and has as generitype Burliganiella siolii (Hustedt) comb. nov., originally described within Fragilaria Lyngb. The main diagnosed features include valves slightly asymmetrical to the apical axis with a sternum located near the ventral margin (Eunotia-like) while internally having slits that are not associated with a helictoglossa and no rimoportula (which is completely absent). While some characters link the species to the ‘araphid’ genus Fragilariforma D.M. Williams & Round, Burliganiella has more shared characters with the Eunotiales. For instance, the lack of a raphe in other species of eunotioid diatoms, suggests multiple lineages within the Eunotiales have reduced or lost raphe systems, such as in the case of Burliganiella.
摘要根据Hustedt于50年代初在亚马逊河流域的采集和描述，描述了一个新的单型硅藻属。利用光镜和扫描电镜对burliganella gen. 11进行了描述，其属型为burliganella siolii (Hustedt) comb。11 .，原属Fragilaria Lyngb。诊断的主要特征包括瓣与尖轴略微不对称，胸骨位于腹缘附近(类似于椎体)，而内部有狭缝，与螺旋舌骨无关，没有窗状孔(完全没有)。虽然一些特征将该物种与“蚜虫”属Fragilariforma D.M. Williams & Round联系起来，但Burliganiella与Eunotiales有更多的共同特征。例如，在其他种类的类针叶硅藻中缺少针叶，这表明针叶硅藻中的多个谱系已经减少或失去了针叶系统，例如伯利根菌的情况。
{"title":"Burliganiella gen. nov. (Bacillariophyta, Eunotiales): Another Case of Raphe Reduction Based on the Type Material of Fragilaria siolii Hustedt","authors":"C. E. Wetzel, J. Kociolek","doi":"10.7872/crya/v39.iss2.2018.255","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.255","url":null,"abstract":"Abstract A new monotypic diatoms genus from Brazil is described based on gatherings and descriptions from the Amazon made by Hustedt in the early 50's. Burliganiella gen. nov. is described using light and scanning electron microscope and has as generitype Burliganiella siolii (Hustedt) comb. nov., originally described within Fragilaria Lyngb. The main diagnosed features include valves slightly asymmetrical to the apical axis with a sternum located near the ventral margin (Eunotia-like) while internally having slits that are not associated with a helictoglossa and no rimoportula (which is completely absent). While some characters link the species to the ‘araphid’ genus Fragilariforma D.M. Williams & Round, Burliganiella has more shared characters with the Eunotiales. For instance, the lack of a raphe in other species of eunotioid diatoms, suggests multiple lineages within the Eunotiales have reduced or lost raphe systems, such as in the case of Burliganiella.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"27 4","pages":"255 - 265"},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72595649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-23DOI: 10.7872/crya/v39.iss2.2018.145
A. Bessudova, L. Sorokovikova, I. Tomberg, Y. Likhoshway
Abstract High diversity of silica-scaled chrysophytes was recorded in the Barguzin River mouth and the Selenga River delta. Their flora was represented by 66 species and intra-specific taxa: Chrysosphaerella — 2, Paraphysomonas — 8, Clathromonas — 5, Spiniferomonas — 8, Mallomonas — 29, and Synura — 14. Eight taxa of silica-scaled chrysophytes were observed for the first time in Russia: Chrysosphaerella rotundata, Mallomonas doignonii, M. trummensis, M. corymbosa, Clathromonas poteriophora, Paraphysomonas acuminata acuminata, P. vulgaris, and Synura laticarina. In May, we found scales of Mallomonas striata with morphologically changed structure in the mouth of the Barguzin River and Srednyaya Channel of the Selenga River delta. The flora of silica-scaled chrysophytes studied differs from one tributary to another. We observed only 52 species in the Selenga River delta, whereas in the Barguzin River mouth we identified 35 species. These large rivers affect the flora of Lake Baikal diversifying silica-scaled chrysophytes in its southern and central basins. The total list of species and intra-specific taxa in the Selenga River delta, Barguzin River mouth, and in Lake Baikal includes 72 taxa. Therefore, this area may be considered as a “hotspot” of silica-scaled chrysophytes together with three hotspots observed worldwide earlier.
{"title":"Silica-Scaled Chrysophytes in Large Tributaries of Lake Baikal","authors":"A. Bessudova, L. Sorokovikova, I. Tomberg, Y. Likhoshway","doi":"10.7872/crya/v39.iss2.2018.145","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.145","url":null,"abstract":"Abstract High diversity of silica-scaled chrysophytes was recorded in the Barguzin River mouth and the Selenga River delta. Their flora was represented by 66 species and intra-specific taxa: Chrysosphaerella — 2, Paraphysomonas — 8, Clathromonas — 5, Spiniferomonas — 8, Mallomonas — 29, and Synura — 14. Eight taxa of silica-scaled chrysophytes were observed for the first time in Russia: Chrysosphaerella rotundata, Mallomonas doignonii, M. trummensis, M. corymbosa, Clathromonas poteriophora, Paraphysomonas acuminata acuminata, P. vulgaris, and Synura laticarina. In May, we found scales of Mallomonas striata with morphologically changed structure in the mouth of the Barguzin River and Srednyaya Channel of the Selenga River delta. The flora of silica-scaled chrysophytes studied differs from one tributary to another. We observed only 52 species in the Selenga River delta, whereas in the Barguzin River mouth we identified 35 species. These large rivers affect the flora of Lake Baikal diversifying silica-scaled chrysophytes in its southern and central basins. The total list of species and intra-specific taxa in the Selenga River delta, Barguzin River mouth, and in Lake Baikal includes 72 taxa. Therefore, this area may be considered as a “hotspot” of silica-scaled chrysophytes together with three hotspots observed worldwide earlier.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"14 1","pages":"145 - 165"},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74566819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-23DOI: 10.7872/crya/v39.iss2.2018.239
Bing Liu, David M. Williams, L. Ector
Abstract The diatom genus Entomoneis includes species with a unique morphology, having panduriform frustules in girdle view, often twisted about its apical axis, with some unique characters such as a sigmoid raphe on elevated bilobate keel, differently shaped junction lines, numerous girdle bands and variously perforated striae. Most of the species belonging to this genus are found to be brackish or marine, with some occurrences in freshwater habitats, but not one species has been described as exclusively freshwater. In this study, the new freshwater diatom species Entomoneis triundulata sp. nov. is described based on a detailed morphological observation using light and scanning electron microscopy. The specific features of E. triundulata are its triundulate valve margin; the shape of the transition between keel and valve body having a proximal U-shaped end, a slightly curved middle segment and a distal V-shaped end; and five sub-compartments to the frustule cavity. Besides morphological features unique to E. triundulata, similarities with other Entomoneis species are reported and discussed.
{"title":"Entomoneis triundulata sp. nov. (Bacillariophyta), a New Freshwater Diatom Species from Dongting Lake, China","authors":"Bing Liu, David M. Williams, L. Ector","doi":"10.7872/crya/v39.iss2.2018.239","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.239","url":null,"abstract":"Abstract The diatom genus Entomoneis includes species with a unique morphology, having panduriform frustules in girdle view, often twisted about its apical axis, with some unique characters such as a sigmoid raphe on elevated bilobate keel, differently shaped junction lines, numerous girdle bands and variously perforated striae. Most of the species belonging to this genus are found to be brackish or marine, with some occurrences in freshwater habitats, but not one species has been described as exclusively freshwater. In this study, the new freshwater diatom species Entomoneis triundulata sp. nov. is described based on a detailed morphological observation using light and scanning electron microscopy. The specific features of E. triundulata are its triundulate valve margin; the shape of the transition between keel and valve body having a proximal U-shaped end, a slightly curved middle segment and a distal V-shaped end; and five sub-compartments to the frustule cavity. Besides morphological features unique to E. triundulata, similarities with other Entomoneis species are reported and discussed.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":"102 1","pages":"239 - 253"},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79418698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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