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":null,"pages":null},"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}
Pub Date : 2018-05-23DOI: 10.7872/crya/v39.iss2.2018.199
I. Novakovskaya, E. Patova, O. Boldina, Anna Patova, D. M. Shadrin
Abstract The algae which cause snow blooming remain poorly studied in the northern regions of the Eastern Europe. However, the process is widely observed, especially, in the mountain regions. The growth of cryophilic algae has a strong fascilitating effect on melting of the glaciers, thus, the comprehensive study of snow algae species would help to foresee and model interrelated processes of climate change in the ecosystem. The red snow blooming in the Subpolar Urals was investigated. The ecological characteristics of habitats where blooming occurred, as well as, chemical parameters of the meltwater were studied. The snow contained important elements for algal development, including N, P, Ca, Mg and other biogenic compounds. The density of algal cells in samples reached 0.33 × 104 cells per ml-1. A Chloromonas reticulata strain isolated from the red snow with massive development of biflagellate algae was studied in detail. The algal strain is stored in a collection of living algae in Institute of Biology Komi Scientific Center (SYKOA Ch-054-11). Based on analysis of ITS2 sequences, morphological and ultrastructural characteristics, the studied biflagellate strain has been placed to Chloromonas clade, Reticulata group with a high bootstrap support. The set of ultrastructural characters detected in isolated strain matched with that of previously described for other Chloromonas reticulata strains. Minor morphological deviations that were observed in Chloromonas reticulata strain from SYKOA Ch-054-11 in comparison with the strains SAG 29.83, SAG 32.86 and SAG 26.90 could be attributed to a latitudinal gradient differences and ecological conditions.
{"title":"Molecular Phylogenetic Analyses, Ecology and Morphological Characteristics of Chloromonas reticulata (Goroschankin) Gobi Which Causes Red Blooming of Snow in the Subpolar Urals","authors":"I. Novakovskaya, E. Patova, O. Boldina, Anna Patova, D. M. Shadrin","doi":"10.7872/crya/v39.iss2.2018.199","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.199","url":null,"abstract":"Abstract The algae which cause snow blooming remain poorly studied in the northern regions of the Eastern Europe. However, the process is widely observed, especially, in the mountain regions. The growth of cryophilic algae has a strong fascilitating effect on melting of the glaciers, thus, the comprehensive study of snow algae species would help to foresee and model interrelated processes of climate change in the ecosystem. The red snow blooming in the Subpolar Urals was investigated. The ecological characteristics of habitats where blooming occurred, as well as, chemical parameters of the meltwater were studied. The snow contained important elements for algal development, including N, P, Ca, Mg and other biogenic compounds. The density of algal cells in samples reached 0.33 × 104 cells per ml-1. A Chloromonas reticulata strain isolated from the red snow with massive development of biflagellate algae was studied in detail. The algal strain is stored in a collection of living algae in Institute of Biology Komi Scientific Center (SYKOA Ch-054-11). Based on analysis of ITS2 sequences, morphological and ultrastructural characteristics, the studied biflagellate strain has been placed to Chloromonas clade, Reticulata group with a high bootstrap support. The set of ultrastructural characters detected in isolated strain matched with that of previously described for other Chloromonas reticulata strains. Minor morphological deviations that were observed in Chloromonas reticulata strain from SYKOA Ch-054-11 in comparison with the strains SAG 29.83, SAG 32.86 and SAG 26.90 could be attributed to a latitudinal gradient differences and ecological conditions.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83425279","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.iss2.2018.167
L. Gaysina, M. Bohunická, V. Hazuková, J. Johansen
Abstract South Ural is a territory with a unique geographical position and heterogeneous natural conditions. Unexplored biodiversity of the terrestrial cyanobacteria of this territory is very high. We undertook a floristic study covering all botanical-geographical zones of the Bashkiria and Bredinskiy district of the Chelyabinsk region. In a total of 85 soil samples collected, 56 species of cyanobacteria were identified. The number of cyanobacteria was highest in the boreal-forest zone (39 species) and notably lower in the other zones (18, 29, and 24 species for broad-leaved forest, forest steppe and steppe regions, respectively). Leptolyngbya voronichiniana, Leptolyngbya foveolarum, cf. Trichocoleus hospitus, Pseudophormidium hollerbachianum, Nostoc cf. punctiforme, Microcoleus vaginatus, Phormidium breve, Phormidium dimorphum, Phormidium corium, and Leptolyngbya cf. tenuis were detected in all studied zones. Trichormus variabilis and Cylindrospermum majus were detected in the forest zone, Phormidium ambiguum was typical for forest-steppe and steppe zones, Pseudophormidium hollerbachianum and Nostoc cf. commune were most abundant in the steppe. Humidity and heterogeneity of the substrate were likely the most important factors influencing terrestrial cyanobacteria diversity. For full understanding of the biodiversity of cyanobacteria in the South Urals, future molecular-genetic research is necessary.
{"title":"Biodiversity of Terrestrial Cyanobacteria of the South Ural Region","authors":"L. Gaysina, M. Bohunická, V. Hazuková, J. Johansen","doi":"10.7872/crya/v39.iss2.2018.167","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.167","url":null,"abstract":"Abstract South Ural is a territory with a unique geographical position and heterogeneous natural conditions. Unexplored biodiversity of the terrestrial cyanobacteria of this territory is very high. We undertook a floristic study covering all botanical-geographical zones of the Bashkiria and Bredinskiy district of the Chelyabinsk region. In a total of 85 soil samples collected, 56 species of cyanobacteria were identified. The number of cyanobacteria was highest in the boreal-forest zone (39 species) and notably lower in the other zones (18, 29, and 24 species for broad-leaved forest, forest steppe and steppe regions, respectively). Leptolyngbya voronichiniana, Leptolyngbya foveolarum, cf. Trichocoleus hospitus, Pseudophormidium hollerbachianum, Nostoc cf. punctiforme, Microcoleus vaginatus, Phormidium breve, Phormidium dimorphum, Phormidium corium, and Leptolyngbya cf. tenuis were detected in all studied zones. Trichormus variabilis and Cylindrospermum majus were detected in the forest zone, Phormidium ambiguum was typical for forest-steppe and steppe zones, Pseudophormidium hollerbachianum and Nostoc cf. commune were most abundant in the steppe. Humidity and heterogeneity of the substrate were likely the most important factors influencing terrestrial cyanobacteria diversity. For full understanding of the biodiversity of cyanobacteria in the South Urals, future molecular-genetic research is necessary.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73538646","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.iss2.2018.215
A. Saber, F. Kouwets, E. Haworth, M. Cantonati
Abstract An Euastrum species (Conjugatophyceae, Streptophyta) was found in an agricultural ditch fed by a rheocrenic, slightly-hot spring ‘Ain El-Balad’ in the El-Farafra Oasis, Western Desert of Egypt. Morphotaxonomic diagnosis and autecology of this desmid species are hereby documented in detail and compared to other morphologically similar species and infraspecific taxa, particularly those of the species complex E. spinulosum. As compared to most other species of that complex, the newly described Euastrum species is mainly characterized by its distinctive small-sized cells, rather shallow and widely open invaginations between the semicell lobes and less pronounced apical lobes. Moreover, the basal lobes are broadly rounded and larger than the lateral lobes. We have named this interesting species E. elfarafraense sp. nov. after the type locality, the El-Farafra Oasis.
{"title":"A New Euastrum Species (Conjugatophyceae, Streptophyta) from the Western Desert of Egypt","authors":"A. Saber, F. Kouwets, E. Haworth, M. Cantonati","doi":"10.7872/crya/v39.iss2.2018.215","DOIUrl":"https://doi.org/10.7872/crya/v39.iss2.2018.215","url":null,"abstract":"Abstract An Euastrum species (Conjugatophyceae, Streptophyta) was found in an agricultural ditch fed by a rheocrenic, slightly-hot spring ‘Ain El-Balad’ in the El-Farafra Oasis, Western Desert of Egypt. Morphotaxonomic diagnosis and autecology of this desmid species are hereby documented in detail and compared to other morphologically similar species and infraspecific taxa, particularly those of the species complex E. spinulosum. As compared to most other species of that complex, the newly described Euastrum species is mainly characterized by its distinctive small-sized cells, rather shallow and widely open invaginations between the semicell lobes and less pronounced apical lobes. Moreover, the basal lobes are broadly rounded and larger than the lateral lobes. We have named this interesting species E. elfarafraense sp. nov. after the type locality, the El-Farafra Oasis.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81862493","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.123
V. Peña, Jazmín J. Hernández-Kantún, W. Adey, L. Gall
Abstract A constant effort in sequencing an extensive number of specimens originating from comprehensive sampling had return an unprecedented amount of information fostering our understanding of diversity, evolution and distribution of coralline algae; however, many sequences lack reliable assignation of a taxonomic name, specially at the species level. Recently, the sequencing of type material allowed to bridge this gap by providing a direct link between the DNA sequence and the type bearing name. For instance, in the genus Lithophyllum, the identity of three species, generally abundant along the European Atlantic and the Mediterranean, was demonstrated by including sequences of the type material. Nevertheless, for less conspicious species, such as Lithophyllum nitorum, data are still needed to assess distribution, anatomy, phylogenetic affinities and taxonomic status. Using DNA sequences recovered from the type material of L. nitorum, further recent collections were resolved as conspecific and used to improve the description and refine the distribution of this species. Lithophyllum nitorum consisted of subtidal, thin crusts overgrowing fragments of dead maerl, pebbles and drifted fragments of fishing lines. The presence of uniporate conceptacles markedly protruding can be considered an external morphological feature useful to identify L. nitorum from other subtidal Lithophyllum species with similar habitat. Lithophyllum nitorum is reported for the Mediterranean Sea and confirmed in the North East Atlantic, a similar distribution as for L. incrustans and L. hibernicum.
{"title":"Assessment of Coralline Species Diversity in the European Coasts Supported by Sequencing of Type Material: The Case Study of Lithophyllum nitorum (Corallinales, Rhodophyta)","authors":"V. Peña, Jazmín J. Hernández-Kantún, W. Adey, L. Gall","doi":"10.7872/crya/v39.iss1.2018.123","DOIUrl":"https://doi.org/10.7872/crya/v39.iss1.2018.123","url":null,"abstract":"Abstract A constant effort in sequencing an extensive number of specimens originating from comprehensive sampling had return an unprecedented amount of information fostering our understanding of diversity, evolution and distribution of coralline algae; however, many sequences lack reliable assignation of a taxonomic name, specially at the species level. Recently, the sequencing of type material allowed to bridge this gap by providing a direct link between the DNA sequence and the type bearing name. For instance, in the genus Lithophyllum, the identity of three species, generally abundant along the European Atlantic and the Mediterranean, was demonstrated by including sequences of the type material. Nevertheless, for less conspicious species, such as Lithophyllum nitorum, data are still needed to assess distribution, anatomy, phylogenetic affinities and taxonomic status. Using DNA sequences recovered from the type material of L. nitorum, further recent collections were resolved as conspecific and used to improve the description and refine the distribution of this species. Lithophyllum nitorum consisted of subtidal, thin crusts overgrowing fragments of dead maerl, pebbles and drifted fragments of fishing lines. The presence of uniporate conceptacles markedly protruding can be considered an external morphological feature useful to identify L. nitorum from other subtidal Lithophyllum species with similar habitat. Lithophyllum nitorum is reported for the Mediterranean Sea and confirmed in the North East Atlantic, a similar distribution as for L. incrustans and L. hibernicum.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88195396","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.3
Markéta Letáková, M. Fránková, A. Poulíčková
Abstract Epiphytic diatoms perform a variety of ecological functions. Diatoms are important primary producers and sources of oxygen which can modify the chemistry of the surrounding aquatic environment. They may live attached to plant surfaces with the help of extracellular polymeric substances and compete with plants for resources (e.g., light, nutrients). Thus, they represent an excellent model system for studies on interactions between epiphytes and their host plants under different environmental conditions. Further, the practical usage of epiphytic diatoms in biomonitoring begs questions concerning substrate specificity, diatom biodiversity, and species delimitations. This review focuses on specific aspects of freshwater epiphytic diatom ecology as adaptations for epiphytic way of life, epiphyte-host relationships, and implications for biomonitoring.
{"title":"Ecology and Applications of Freshwater Epiphytic Diatoms — Review","authors":"Markéta Letáková, M. Fránková, A. Poulíčková","doi":"10.7872/crya/v39.iss1.2018.3","DOIUrl":"https://doi.org/10.7872/crya/v39.iss1.2018.3","url":null,"abstract":"Abstract Epiphytic diatoms perform a variety of ecological functions. Diatoms are important primary producers and sources of oxygen which can modify the chemistry of the surrounding aquatic environment. They may live attached to plant surfaces with the help of extracellular polymeric substances and compete with plants for resources (e.g., light, nutrients). Thus, they represent an excellent model system for studies on interactions between epiphytes and their host plants under different environmental conditions. Further, the practical usage of epiphytic diatoms in biomonitoring begs questions concerning substrate specificity, diatom biodiversity, and species delimitations. This review focuses on specific aspects of freshwater epiphytic diatom ecology as adaptations for epiphytic way of life, epiphyte-host relationships, and implications for biomonitoring.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72671652","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.109
R. Hoffman, M. J. Wynne, G. Saunders
Abstract Calliblepharis rammediorum sp. nov. (Gigartinales, Rhodophyta) is described from the northern Levant Mediterranean shore of Israel. The new species has a prostrate creeping habit. It usually grows as an epiphyte, strongly attached by several discoidal holdfasts to the base of branches of some seaweed species, mainly on some non-native species and particularly on Laurencia chondrioides. Phylogenetic analyses of sequence data indicate that C. rammediorum is closely related to an unidentified species from the Cocos (Keeling) Islands, Australia. These two are sister to a complex of two genetic groups both assigned to the morphospecies Calliblepharis fimbriata, whose species identity clearly requires further research. Calliblepharis rammediorum is the fourth that is newly described for the genus Calliblepharis since the beginning of the last decade. Aspects of its biology and ecology are also discussed.
{"title":"Calliblepharis rammediorum sp. nov. (Gigartinales, Rhodophyta) from the Israeli Levant Mediterranean Sea","authors":"R. Hoffman, M. J. Wynne, G. Saunders","doi":"10.7872/crya/v39.iss1.2018.109","DOIUrl":"https://doi.org/10.7872/crya/v39.iss1.2018.109","url":null,"abstract":"Abstract Calliblepharis rammediorum sp. nov. (Gigartinales, Rhodophyta) is described from the northern Levant Mediterranean shore of Israel. The new species has a prostrate creeping habit. It usually grows as an epiphyte, strongly attached by several discoidal holdfasts to the base of branches of some seaweed species, mainly on some non-native species and particularly on Laurencia chondrioides. Phylogenetic analyses of sequence data indicate that C. rammediorum is closely related to an unidentified species from the Cocos (Keeling) Islands, Australia. These two are sister to a complex of two genetic groups both assigned to the morphospecies Calliblepharis fimbriata, whose species identity clearly requires further research. Calliblepharis rammediorum is the fourth that is newly described for the genus Calliblepharis since the beginning of the last decade. Aspects of its biology and ecology are also discussed.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79874603","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.63
Y. Nemcova, E. Rott
Abstract To expand on the biodiversity study of the eastern Alpine region of North Tyrol, we investigated silica-scaled chrysophyte flora of unexplored high-altitude Alpine sites. We concentrated mostly on lakes that were 1000–2500 m above sea level; some of them were still partly ice covered. Overall, 27 taxa were recorded at 12 sites, despite 21 sites being sampled altogether. In general, the sites were oligotrophic and species poor. Due to a restricted data set, an extensive analysis was not possible. However, altitude and pH were found to be important variables for explaining species distribution. We described the new species Mallomonas pechlaneri from two of the sampled sites. Mallomonas pechlaneri most closely resembles Mallomonas striata var. striata and M. striata var. serrata; these three taxa are clearly distinguished by bristle morphology and scale shape. The bristles of M. pechlaneri terminate in a bifurcated tip consisting of unequal diverging branches. Scale shape was captured my means of landmark-based geometric morphometries (GM) and evaluated using multivariate statistical analyses. GM methods proved to be an efficient tool to be employed in chrysophycean taxonomy.
{"title":"Diversity of Silica-scaled Chrysophytes in High-altitude Alpine Sites (North Tyrol, Austria) Including a Description of Mallomonas pechlaneri sp. nov.","authors":"Y. Nemcova, E. Rott","doi":"10.7872/crya/v39.iss1.2018.63","DOIUrl":"https://doi.org/10.7872/crya/v39.iss1.2018.63","url":null,"abstract":"Abstract To expand on the biodiversity study of the eastern Alpine region of North Tyrol, we investigated silica-scaled chrysophyte flora of unexplored high-altitude Alpine sites. We concentrated mostly on lakes that were 1000–2500 m above sea level; some of them were still partly ice covered. Overall, 27 taxa were recorded at 12 sites, despite 21 sites being sampled altogether. In general, the sites were oligotrophic and species poor. Due to a restricted data set, an extensive analysis was not possible. However, altitude and pH were found to be important variables for explaining species distribution. We described the new species Mallomonas pechlaneri from two of the sampled sites. Mallomonas pechlaneri most closely resembles Mallomonas striata var. striata and M. striata var. serrata; these three taxa are clearly distinguished by bristle morphology and scale shape. The bristles of M. pechlaneri terminate in a bifurcated tip consisting of unequal diverging branches. Scale shape was captured my means of landmark-based geometric morphometries (GM) and evaluated using multivariate statistical analyses. GM methods proved to be an efficient tool to be employed in chrysophycean taxonomy.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76549088","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.85
Ramzi Miladi, Antonio Manghisi, S. Armeli Minicante, G. Genovese, S. Abdelkafi, M. Morabito
Abstract The cosmopolitan genus Ulva Linnaeus includes species of green macroalgae found in marine, brackish and some freshwater environments. Although there is a wide literature for the determination of Ulva taxa in Europe, they are among the most problematic algae to accurately identify, because they have few distinctive features, as well as a high intraspecific variation. At present, the knowledge of both diversity and distribution of the genus Ulva in the Mediterranean Sea is almost entirely based on morphological studies and there is only a few published papers dealing with molecular data. Tunisia has a key position in the Mediterranean and constitutes a transition area with a rich habitat diversity between eastern and western basins. The latest inventory of marine macrophytes dates back to 1987, updated in 1995. The aim of the present paper is to provide a molecular-assisted alpha taxonomy survey of Ulva spp. along Tunisian coasts, in comparison with a few Italian sites, using the tufA marker. Nine genetic species groups were resolved, including the non indigenous species Ulva ohnoi, newly reported for Tunisia. The actual picture of the taxonomy of Ulva spp. in the Mediterranean as a whole is far to be clarified and the present data on Tunisian collections aim to be a step towards its clarification. This paper is the first DNA barcoding study on green macroalgae in Tunisia and it contributes to add records to the Barcode Of Life Data Systems which are publically available.
{"title":"A DNA Barcoding Survey of Ulva (Chlorophyta) in Tunisia and Italy Reveals the Presence of the Overlooked Alien U. ohnoi","authors":"Ramzi Miladi, Antonio Manghisi, S. Armeli Minicante, G. Genovese, S. Abdelkafi, M. Morabito","doi":"10.7872/crya/v39.iss1.2018.85","DOIUrl":"https://doi.org/10.7872/crya/v39.iss1.2018.85","url":null,"abstract":"Abstract The cosmopolitan genus Ulva Linnaeus includes species of green macroalgae found in marine, brackish and some freshwater environments. Although there is a wide literature for the determination of Ulva taxa in Europe, they are among the most problematic algae to accurately identify, because they have few distinctive features, as well as a high intraspecific variation. At present, the knowledge of both diversity and distribution of the genus Ulva in the Mediterranean Sea is almost entirely based on morphological studies and there is only a few published papers dealing with molecular data. Tunisia has a key position in the Mediterranean and constitutes a transition area with a rich habitat diversity between eastern and western basins. The latest inventory of marine macrophytes dates back to 1987, updated in 1995. The aim of the present paper is to provide a molecular-assisted alpha taxonomy survey of Ulva spp. along Tunisian coasts, in comparison with a few Italian sites, using the tufA marker. Nine genetic species groups were resolved, including the non indigenous species Ulva ohnoi, newly reported for Tunisia. The actual picture of the taxonomy of Ulva spp. in the Mediterranean as a whole is far to be clarified and the present data on Tunisian collections aim to be a step towards its clarification. This paper is the first DNA barcoding study on green macroalgae in Tunisia and it contributes to add records to the Barcode Of Life Data Systems which are publically available.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77898745","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 : 2018-02-23DOI: 10.7872/crya/v39.iss1.2018.23
K. Procházková, Y. Nemcova, J. Neustupa
Abstract The Watanabea clade of the Trebouxiophyceae includes unicellular coccoid green microalgae that mostly thrive in subaerial microhabitats. Recently, a number of new genera and species were described on the basis of the DNA sequence data and morphological observations. The peculiar genus Phyllosiphon, which forms a monophyletic clade within the Watanabea clade, is characterized by forming siphonous parasitic stages thriving in the leaves of the Araceae. In addition, several previous studies demonstrated that members of the genus Phyllosiphon also include free-living chlorelloid individuals that occur on various subaerial substrates. A number of Phyllosiphon members sampled from European subaerial microhabitats have so far not been taxonomically described, because they were not available in cultures. In this study, we provide a taxonomic description of a new species of the genus Phyllosiphon, P. duini, isolated from a corticolous biofilm growing on Quercus pubescens in a sub-Mediterranean forest stand. The simple chlorelloid morphology of this strain did not unambiguously distinguish Phyllosiphon duini from other closely related members of the Watanabea clade. However, phylogenetic analyses based on the 18S rDNA sequences showed that this species clustered in a sister position to a Phyllosiphon species previously described from eastern Asia. Similar phylogenetic pattern was also supported by the plastid-encoded rbcL gene sequences of members of the Watanabea clade. Our data demonstrate that the genus Phyllosiphon represents a diverse phylogenetic lineage within the subaerial chlorelloid green microalgae of the Watanabea clade.
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