Fottea, 2016 (vol. 16), issue 1

Original article

Pseudanabaena foetida sp. nov. and P. subfoetida sp. nov. (Cyanophyta/ Cyanobacteria) producing 2-methylisoborneol from Japan

Yuko Niiyama, Akihiro Tuji, Kuniko Takemoto, Satoshi Ichise

Fottea 2016, 16(1):1-11 | 10.5507/fot.2016.006  

Nasty smell of tap water supplied from Lake Biwa caused a great trouble. Then many researches have been conducted from the point of view of water supply management or water quality in Japan. The matter of this bad smell was identified as 2-methylisoborneol (2-MIB) and the source organism of this bad odor was then reported as Phormidium tenue and later two different cultured strains were established. One of these strains shows green color, produce 2-MIB, and is marked PTG. The other shows brown color, does not produce 2-MIB and is marked PTB. However their nomenclatural description has not been done yet and, in fact, they have morphological...

Rhizoclonium ramosum sp. nov. (Cladophorales, Chlorophyta), a new freshwater algal species from China

Zhi-Juan Zhao, Huan Zhu, Guo-Xiang Liu, Zheng-Yu Hu

Fottea 2016, 16(1):12-21 | 10.5507/fot.2015.024  

A novel freshwater filamentous green alga was collected from rocks situated in flowing water in Henan and Hunan provinces, central China. This alga was slender and soft and exhibited similar morphology to that of Rhizoclonium spp. It was attached to the substrate by rhizoids, and had parietal, reticulate chloroplasts. However, it exhibited true branches characteristic, from the basal to the apical parts of the filaments. There were a large number of nuclei (4-17) per cell. Two types of pyrenoids (bilenticular and, rarely, zonate) were observed using light microscopy and transmission electron microscopy. Phylogenetic analyses were mainly based...

The occurrence of microscopic algae with blue-green chloroplasts or with endocyanelles (Glaucophyta) in the fresh waters of the Czech Republic, with a new report of Cryptella cyanophora Pascher

Pavel Javornický

Fottea 2016, 16(1):22-33 | 10.5507/fot.2016.004  

One of the observed flagellates, Cryptella cyanophora Pascher, is probably the first discovery ever of this species with cyanelles after more than 80 years since its description. This species was previously classified into the cryptophycean genus Chroomonas Hansgirg (see Discussion), which is why the observations of two common species, Chroomonas nordstedtii Hansg. and Ch. caudata Geitler, from natural water bodies are also presented and the theory of their cytological evolution is discussed. Similar uncertainty is associated with the origin of blue-green chloroplasts of some dinoflagellates, two species of which (from Czech...

Morphological and molecular evidence support description of two new diatom species from the genus Ulnaria in Lake Baikal

Maxim Kulikovskiy, Horst Lange-Bertalot, Natalia Annenkova, Evgeniy Gusev, John Patrick Kociolek

Fottea 2016, 16(1):34-42 | 10.5507/fot.2015.011  

Light and scanning electron microscopical observations are made on two non-raphid pennate species from Lake Baikal, Russia. Based on their morphologies, they are assigned to the genus Ulnaria. Molecular data from rbcL sequences were also generated from cultures of these two taxa. Combined morphological and molecular data suggest one of the species is the same as a species commonly referred to as Synedra acus, a species commonly reported from Lake Baikal and used as a model species for studies on valve silicification and nanotechnology applications. The second species is similar to Ulnaria ulna. Both taxa are important players...

Phylogenetic and taxonomic position of the genus Wollea with the description of Wollea salina sp. nov. (Cyanobacteria, Nostocales)

Eliška Kozlíková-Zapomělová, Thomrat Chatchawan, Jan Kaštovský, Jiří Komárek

Fottea 2016, 16(1):43-55 | 10.5507/fot.2015.026  

The taxonomic separation of the related heterocytous cyanobacterial genera Wollea and Anabaena is unclear according to traditional taxonomic features, as modern polyphasic approach has not yet been applied to compare them. However, comparison of the type species of these genera and their polyphasic analyses enable the separation of both generic entities. Definitions of their diacritical characters follow from the combination of their phylogenetic and morphological criteria. The concepts of Anabaena sensu stricto (particularly without planktic types with gas vesicles in cells - Dolichospermum) and Wollea, derived from...

Pantocsekiella, a new centric diatom genus based on morphological and genetic studies

Éva Ács, Eszter Ari, Mónika Duleba, Mirko Dreßler, Sergei I. Genkal, Éena Jakó, Frederic Rimet, Luc Ector, Keve T. Kiss

Fottea 2016, 16(1):56-78 | 10.5507/fot.2015.028  

The paper is dedicated for 100th death anniversary of the famous Hungarian diatomologist József Pantocsek (1846-1916). Previous morphological studies showed that the description of the Cyclotella genus was too general and according to new morphological criteria new genera were established based on both recent and fossil taxa (e.g. Discostella, Handmannia, Puncticulata, Tertiarius). Furthermore, previous molecular biological investigations proved that the Cyclotella genus was not monophyletic. Integrating the above mentioned knowledge the former Cyclotella genus has been split into 4 genera...

The genus Nitzschia on the South Shetland Islands and James Ross Island

Sarah Hamsher, Kateřina Kopalová, J. Patrick Kociolek, Ralitsa Zidarova, Bart Van De Vijver

Fottea 2016, 16(1):79-102 | 10.5507/fot.2015.023  

The purpose of this study was to present LM and SEM observations of Nitzschia taxa encountered on the South Shetland Islands and James Ross Island. During the ongoing taxonomical revision of the freshwater and limno-terrestrial diatom flora on the South Shetland Islands and James Ross Island (Maritime Antarctic Region) eight unknown taxa belonging to the genus Nitzschia were found. These taxa were previously force-fitted into European names such as N. commutata or N. perminuta, but detailed light and scanning electron microscopical observations allowed their separation from the already known taxa and resulted in the description...

Conference proceedings

Phylogenetic position of Geitleribactron purpureum (Synechococcales, Cyanobacteria / Cyanophyceae) and its implications for the taxonomy of Chamaesiphonaceae and Leptolyngbyaceae

Jan Mareš, Marco Cantonati

Fottea 2016, 16(1):104-111 | 10.5507/fot.2016.002  

Over the last decades, the taxonomy of cyanobacteria has been considerably improved and restructured due to the increase in data output from molecular phylogeny. Recently, a new protocol was developed that enables reliable sequencing of 16S rRNA genes in cultivation-resistant cyanobacteria using analysis of single cells, filaments, or colonies. In the current study, we examined a sample of a heteropolar unicellular cyanobacterium, Geitleribactron purpureum, from the holotype material (deep epilithon of Lake Tovel, Western Dolomites, Italy). We isolated and purified single colonies of G. purpureum, and subjected them to direct PCR and...

Taxonomic revision of Chamaepinnularia krookiformis Lange-Bertalot et Krammer with a description of Chamaepinnularia plinskii sp. nov.

Joanna Żelazna-Wieczorek, Rafał M. Olszyński

Fottea 2016, 16(1):112-121 | 10.5507/fot.2016.001  

The benthic diatoms collected during our recent research in athalassic habitats exemplify a high morphological variability within Chamaepinnularia krookiformis Lange-Bertalot et Krammer. The species has already been known from freshwater ecosystems as well as from brackish waters in different regions of Europe. This variability has been also confirmed by the analysis of the literature. However, this is the first time that the morphological variability of the species has been addressed. In order to revise C. krookiformis and describe a new species, which has been distinguished on the basis of our material, we compared it with the type...

Intensive study of freshwater red algae (Rhodophyta) in Finland

Pertti Eloranta, Anssi Eloranta, Pasi Perämäki

Fottea 2016, 16(1):122-132 | 10.5507/fot.2015.025  

Abstract: Freshwater red algae (Rhodophyta) were studied in Central Finland by examining 2224 rivers and brooks during the open water periods of the years 2012-2015 with supplementary sampling in S- and SW-Finland, the W-coast rivers and Lapland. A total of 1957 records of algae were made. Approximately 56.2% of the studied locations had 1-6 taxa. The total taxa collected were 25, with 5 taxa new to Finland. While sampling, ecological variables were recorded and measured. The most common taxa were Batrachospermum gelatinosum (37.0%), Sheathia arcuata (10.7%), Audouinella hermannii (11.2%) and Sirodotia suecica (7.0%)....

Exploring the contrasting seasonal strategies of two crenic macroalgae

Marco Cantonati*, Daniel Spitale, Alessia Scalfi, Graziano Guella

Fottea 2016, 16(1):133-143 | 10.5507/fot.2015.029  

Most studies on springs assumed stability, and reduced seasonal changes in the biota. We focused on two macroalgae (the rhodophyte Hildenbrandia rivularis and the chrysophyte Hydrurus foetidus) to unveil their seasonal-development patterns in springs. H. rivularis cover remained virtually constant throughout the year, although seasonal fluctuations in ecophysiological parameters were detected. The most important determinant of seasonal changes in H. rivularis was shown to be the complex interplay between solar radiation (day length) and shading. Negative cross-correlation between Chl-a and shading was found to be...