Fottea, 2018 (vol. 18), issue 2
Original article
New simple trichal cyanobacterial taxa isolated from radioactive thermal springs
Fatemeh Heidari, Jan Zima Jr., Hossein Riahi, Tomáš Hauer
Fottea 2018, 18(2):137-149 | DOI: 10.5507/fot.2017.024 
There are several places in the world where the level of natural radiation is unusually high, such as some regions of Ramsar and Abegarm-e-Mahallat in Iran. Such places are still insufficiently explored in terms of their biodiversity. In this study, strains isolated from six geothermal springs with elevated natural radiation were investigated. The highest concentration of 226Ra were 13,000 Bq.kg-1 in the soil and 130 Bq.l-1 in water respectively. The morphological and molecular analyses revealed, that the strains are not classifiable to any existing taxon. Therefore, they are described as new taxa for science. Based...
Molecular characterization of Geitleria appalachiana sp. nov. (Nostocales, Cyanobacteria) and formation of Geitleriaceae fam. nov.
Chase Kilgore, Jeffrey R. Johansen, Truc Mai, Tomáš Hauer, Dale A. Casamatta, Christopher A. Sheil
Fottea 2018, 18(2):150-163 | DOI: 10.5507/fot.2018.002
Geitleria was described from a limestone cave in Israel, and subsequently reported from caves of France, Romania, Spain, Florida, Costa Rica, and Cook Islands. It is morphologically unusual in that it has true branching, but no heterocytes. A morphologically distinct species of Geitleria was recently collected from a limestone cave in Great Smoky Mountains National Park, Tennessee, and is herein described as G. appalachiana sp. nov. Sequence data for 16S rRNA and rpoC1 loci for the species were obtained from field material using single filament PCR. Phylogenetic evidence indicates that Geitleria does not belong to any family...
Mastogloia wulffii, a new diatom (Bacillariophyceae) from the west coast of Sweden
Adil Al-Handal, Chiara Pennesi
Fottea 2018, 18(2):164-169 | DOI: 10.5507/fot.2018.003
While collecting epiphytic diatom samples from the west coast of Sweden, a small Mastrogloia species has been observed and could not be matched with any of the described taxa. Based on both light and electron microscopes examination, this species has been described as new, Mastogloia wulffii sp. nov. and included in Mastogloia section Sulcatae. This species is very small with valve length not exceeding 16.3 µm. It is characterized by having a narrow, almost straight median depression on both sides of the sternum-raphe, no marginal ridge and with rounded areolae on valve mantle as well as having completely hyaline lateral sterna....
Evolutionary relationships between the varieties of green algae Pediastrum boryanum and P. duplex s.l. (Chlorophyceae, Hydrodictyaceae)
Joanna Lenarczyk*, Marta Saługa
Fottea 2018, 18(2):170-188 | DOI: 10.5507/fot.2018.004
The infraspecific relationships of the two most variable species, Pediastrum boryanum and P. duplex s.l. identified on the basis of morphological criteria, have been poorly studied so far. The present study focused on 12 original strains isolated from Polish water bodies and 29 strains from the GenBank database, which represent P. boryanum, P. duplex s.l. varieties and other morphologically similar taxa, against the background of 14 other strains of the family Hydrodictyaceae. In order to estimate the level of congruence between the phylogeny and the classical taxonomic system based on morphological criteria, the strains...
Quadricoccopsis gen. nov., a new genus of Quadricoccus-like algae in Oocystaceae from China (Trebouxiophyceae, Chlorophyta)
Xudong Liu, Huan Zhu, Huiyin Song, Benwen Liu, Qinghua Wang, Guoxiang Liu, Zhengyu Hu
Fottea 2018, 18(2):189-199 | DOI: 10.5507/fot.2018.005
Members of Quadricoccus-like algae are characterized by oval to ellipsoid cells adherent to the bowl-shaped or stretched, empty mother cell walls and are common in phytoplankton of inland waters. To date, the morphologically similar genera Quadricoccus and Lobocystis are accepted for this group and the former had been phylogenetic positioned in Oocystaceae. In this study, seven strains of Quadricoccus-like algae were identified and successfully cultured in the laboratory. Light and electron microscope observations and phylogenetic analysis revealed that the strains represent three different species within a new genus, described...
Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region
Bart Van de Vijver, Carlos E. Wetzel, Luc Ector
Fottea 2018, 18(2):200-211 | DOI: 10.5507/fot.2018.006
During a survey of the freshwater diatom flora on the sub-Antarctic islands of the southern Indian Ocean, two new Planothidium species were observed, showing some resemblance to Planothidium delicatulum. Therefore, the type material of Achnanthidium delicatulum Kützing was analysed, a common species in northern hemisphere waterbodies that was later transferred to the genus Planothidium. Additionally the material of Types du Synopsis des Diatomées de Belgique n° 234, designated in 1980 as neotype for Achnanthes delicatula was investigated. This analysis showed that the population in Types n° 234 is not conspecific...
A new sediment dwelling and epizoic species of Olifantiella (Bacillariophyceae), with an account on the genus ultrastructure based on Focused Ion Beam nanocuts
Aydin Kaleli, Marta Krzywda, Andrzej Witkowski, Catherine Riaux-Gobin, Cüneyt Nadir Solak, Izabela Zgłobicka, Tomasz Płociński, Justyna Grzonka, Krzysztof J. Kurzydłowski, Ana Car, Catherine Desrosiers, Yakup Kaska, Kevin McCartney
Fottea 2018, 18(2):212-226 | DOI: 10.5507/fot.2018.007
The marine diatom Olifantiella Riaux-Gobin et Compère predominantly occurs in tropical Indo-Pacific coral reef environments. The genus has about a dozen validly published taxa and is characterized by transapically elongate striae composed of a macroareola, broad perforated girdle, and tubular buciniportula process of trumpet-shape. The valve mantle of taxa related to the generitype, O. mascarenica, have a canal-shaped structure around the valve at the face / mantle junction, while those to O. gorandiana have a simple mantle or strongly narrow canal and complex buciniportula composed of hollow processes. The geographic...
Polyphasic approach to a characteristic Ulva population from a limno-rheocrenic, mineral (chloride, sodium, sulphate) spring in the Siwa Oasis (Western Desert of Egypt)
Abdullah A. Saber, Jan Mareš, Graziano Guella, Andrea Anesi, Lenka Štenclová, Marco Cantonati
Fottea 2018, 18(2):227-242 | DOI: 10.5507/fot.2018.008
An interesting population of ulvacean green algae was collected from a limno-rheocrenic, thermal, mineral (chloride, sodium, sulphate) spring known as "Ain Abu Sherouf" in the Siwa Oasis, the Western Desert of Egypt. A detailed combined investigation on its morphotaxonomy, autecology, and a multilocus sequence data set including the chloroplast-encoded rbcL gene and the nuclear-encoded nrDNA SSU and ITS allowed us to identify this population as Ulva flexuosa subsp. paradoxa (syn. Ulva paradoxa, Ulvales, Chlorophyta), although the algal thalli were in average narrower than usual in this taxon. Analysis of the molecular rbcL-ITS...
Morphology and phylogeny of three planktonic Radiococcaceae sensu lato species (Sphaeropleales, Chlorophyceae) from China, including the description of a new species Planktosphaeria hubeiensis sp. nov.
Qi Zhang, Lingling Zheng, Tianli Li, Guoxiang Liu, Lirong Song
Fottea 2018, 18(2):243-255 | DOI: 10.5507/fot.2018.009
The family Radiococcaceae sensu lato, defined as colonial autospore-producing mucilaginous coccoid green algae, is widespread in terrestrial and freshwater habitats. Three species of Radiococcaceae sensu lato, including two Radiococcus species and one Planktosphaeria species, were described from China by light and electron microscopy. A new species of Planktosphaeria, Planktosphaeria hubeiensis sp. nov. was erected based on morphological comparisons and genetic analyses. Our phylogenetic analyses indicated that Radiococcaceae sensu lato is polyphyletic, and separated into three lineages. The Radiococcus species...
Personalia
In memoriam – RNDr. Jaroslava Komárková, CSc.
Eliška Kozlíková–Zapomělová
Fottea 2018, 18(2):i-iii
Jaroslava Komárková, an important Czech hydrobiologist and algologist and our dear colleague, passed away on August 19, 2017, at the age of 79.She was born on January 20, 1938 in Prague as one of three children. She graduated from Charles University in Prague, Faculty of Sciences in 1961. The subject of her study was Scientific biology and chemistry (with special orientation to phycology) and her diploma thesis „Systematics of the genus Ankistrodesmus Corda“ was elaborated under the supervision of Prof. Bohuslav Fott.
Anniversary of RNDr. Zdeňka Žáková, CSc.
Rodan Geriš, Markéta Fránková
Fottea 2018, 18(2):iv
Zdeňka Žáková was born 17. 4. 1938 in Brno. Zdeňkas’ love for nature have predestined her life path. After graduation from grammar school she started to study biology and chemistry with specialization in plant physiology at the Faculty of science, Masaryk university (former Jan Evangelista Purkyně university) in Brno. She successfully completed her studies in 1961 obtaining an academic title graduated biologist (promovaný biolog). She continued in plant physiology studies and achieved another two academic degrees: RNDr. (rerum naturalium doctor) in 1967 and CSc. (candidatus scientiarum) in 1977.