Fottea, 2018 (vol. 18), issue 1
Chloromonas nivalis subsp. tatrae, subsp. nov. (Chlamydomonadales, Chlorophyta): re-examination of a snow alga from the High Tatra Mountains (Slovakia)
Lenka Procházková, Daniel Remias, Tomáš Řezanka, Linda Nedbalová
Fottea 2018, 18(1):1-18 | DOI: 10.5507/fot.2017.010
Melting snow fields populated by aplanozygotes of the genus Chloromonas (Chlamydomonadales, Chlorophyta) are found in polar and alpine habitats. In the High Tatra Mountains (Slovakia), cells causing blooms of brownish-red snow designated as Scotiella tatrae Kol turned out to be genetically (18S, ITS1 and ITS2 rDNA, rbcL) very closely related to Chloromonas nivalis (Chodat) Hoham et Mullet from the Austrian Alps. Therefore, Sc. tatrae is transferred into the latter taxon and reduced to a subspecies as Cr. nivalis subsp. tatrae. Both exhibit a similar photosynthetic performance, thrive in similar...
Burning coal spoil heaps as a new habitat for the extremophilic red alga Galdieria sulphuraria
Dovilė Barcytė, Linda Nedbalová, Adam Culka, Filip Košek, Jan Jehlička
Fottea 2018, 18(1):19-29 | DOI: 10.5507/fot.2017.015
Galdieria sulphuraria (Cyanidiales) is a worldwide acclaimed thermoacidophilic red microalga with a limited distribution due to special conditions required for growth and metabolism. Until now, the alga was almost exclusively restricted to acid geothermal environments around the world. However, we have found this species on the surface of a burning coal spoil heap in central Europe. It is the first record of G. sulphuraria in this type of habitat. A rbcL phylogeny confirmed that the population of this extremophile belongs to the continental European lineage and we consider Italian geothermal sites as a potential source of Czech...
Ultrastructure of Delicata sinensis Krammer et Metzeltin and D. williamsii sp. nov. (Bacillariophyta) from China
Bing Liu, Saúl Blanco, Qing-yan Lan
Fottea 2018, 18(1):30-36 | DOI: 10.5507/fot.2017.009
Two sympatric species, Delicata sinensis Krammer et Metzeltin and D. williamsii sp. nov. are studied under light and scanning electron microscopy. Both species possess open valvocopulae, which is reported for the first time within the genus. Delicata sinensis often exhibits a semifascia-like central area but sometimes only a little broadened central area bordered by a few shortened striae in the middle part of the dorsal side. Regarding D. williamsii, a freshwater, epilithic taxon, it exhibits a unique combination of characters: a dorsiventral valve outline, non-produced ends and, remarkably, widely spaced 2-3 very long...
The potential of High-Throughput Sequencing (HTS) of natural samples as a source of primary taxonomic information for reference libraries of diatom barcodes
Frédéric Rimet, Nelida Abarca, Agnès Bouchez, Wolf-Henning Kusber, Regine Jahn, Maria Kahlert, François Keck, Martyn G. Kelly, David. G. Mann, André Piuz, Rosa Trobajo, Kalman Tapolczai, Valentin Vasselon, Jonas Zimmermann
Fottea 2018, 18(1):37-54 | DOI: 10.5507/fot.2017.013
Diatoms are used routinely to assess pollution level in rivers and lakes. Current methods are based on identification by light microscopy, which is laborious. An alternative is to identify species based on short DNA fragments and High-Throughput Sequencing (HTS). However a potential limitation is the incomplete coverage of species in reference barcode libraries. Usually these libraries are compiled by isolating cells, before culturing and sequencing them, which is tedious and often unsuccessful. Here we propose the use of rbcL sequences from environmental samples analysed by HTS. We set several criteria to ensure good sequence quality and correspondence...
Six new Frustulia species (Bacillariophyta) in Tierra del Fuego peatbogs, Patagonia, Argentina
Valeria Casa, Gabriela Mataloni, Bart Van de Vijver
Fottea 2018, 18(1):55-71 | DOI: 10.5507/fot.2017.016
During a survey of the freshwater aquatic diatom flora of two peat bog areas in Tierra del Fuego, southern Argentina, six taxa belonging to the genus Frustulia that could not be identified were observed. Comparison with the type material of Frustulia (Navicula) crassinervia separated the Tierra del Fuego populations showing some resemblance as a new species: F. australocrassinervia sp. nov. The other five taxa are likewise described as new based on light and scanning electron microscopy observations and comparison with all known Frustulia species worldwide. Frustulia delicatula sp. nov., F. ellipticolanceolata...
Myrmecia israeliensis as the primary symbiotic microalga in squamulose lichens growing in European and Canary Island terricolous communities
Patricia Moya, Salvador Chiva, Aránzazu Molins, Iva Jadrná, Pavel Škaloud, Ondřej Peksa, Eva Barreno
Fottea 2018, 18(1):72-85 | DOI: 10.5507/fot.2017.022
Myrmecia israeliensis has been traditionally considered as a green coccoid free-living microalga. This microalga was previously suggested as the primary phycobiont in the lichens Placidium spp., Heteroplacidium spp., and Psora decipiens. However, due to the absence of ITS rDNA sequences (barcode information) published along with these investigations, the symbiotic nature of M. israeliensis might be confirmed by using the DNA barcoding and different microscopic examinations both in the symbiotic state and in culture. The aim of this study was to settle the presence of M. israeliensis as the primary microalga...
Nunduva, a new marine genus of Rivulariaceae (Nostocales, Cyanobacteria) from marine rocky shores
Laura González-Resendiz*, Jeffrey R. Johansen, Luisa Alba-Lois, Claudia Segal-Kischinevzky, Viviana Escobar-Sánchez, Luis F. Jimenez Garcia, Tomáš Hauer, Hilda León-Tejera
Fottea 2018, 18(1):86-105 | DOI: 10.5507/fot.2017.018
Several populations of a non-tapering and tapering, fasciculated, single and geminate false branching heterocytous cyanobacterium were collected from rocky shores in the Pacific Ocean and Gulf of Mexico. The populations were provisionally placed in Brasilonema based on morphology, but upon sequencing of both environmental and culture material it was discovered that the populations/cultures belonged to the Rivulariaceae, in a marine subclade of the family containing Kyrtuthrix huatulcensis. In culture, the taxon exhibited tapering in isopolar filaments, providing further evidence that it was a member of the rivulariacean clade. Based on...
Planothidium juandenovense sp. nov. (Bacillariophyta) from Juan de Nova (Scattered Islands, Mozambique Channel) and other tropical environments: A new addition to the Planothidium delicatulum complex
Catherine Riaux-Gobin, Andrzej Witkowski, Anton Igersheim, Christopher S. Lobban, Adil Y. Al-Handal, Pierre Compère
Fottea 2018, 18(1):106-119 | DOI: 10.5507/fot.2017.019
Planothidium juandenovense sp. nov. (Bacillariophyta) is described from the marine tropical environments of Juan de Nova I. (Mozambique Channel), Rodrigues I. (Mascarene Archipelago) and from Guam (Northern Mariana Is., Pacific). This small and relatively rare taxon has short multiseriate striae on the sternum valve (SV), hooked raphe valve (RV) terminal raphe endings and no SV cavum or hoof-shaped area. This taxon has similarities with Planothidium delicatulum (Kütz.) Round et Bukht. and Planothidium septentrionale (Østrup) Round et Bukht. ex Rumrich et al., but also differences: e.g. a relatively narrow and rhombic SV sternum,...
Description of the new freshwater diatom genus Okhapkinia gen. nov. from Laos (Southeast Asia), with notes on family Sellaphoraceae Mereschkowsky 1902
Maxim Kulikovskiy, Anton Glushchenko, Irina Kuznetsova, John Patrick Kociolek
Fottea 2018, 18(1):120-129 | DOI: 10.5507/fot.2017.021
A new monotypic diatom genus from Laos is described, Okhapkinia alexandrii Glushchenko, Kulikovskiy et Kociolek gen. et sp. nov. The new genus is described on the basis light and scanning electron microscope observations. This genus is similar morphologically to the genus Sellaphora Mereschkowsky on the basis of several shared features. These features include presence of uniseriate striae, internal hymenate pore occlusions, large, elongate helictoglossae, round depressions at the valve face mantle junction, straight internal raphe slit, presence of longitudinal lines positioned on either side of the axial area, and striae arrangement...
Difference without distinction? Gaps in cyanobacterial systematics; when more is just too much
Petr Dvořák, Eva Jahodářová, Dale A. Casamatta, Petr Hašler, Aloisie Poulíčková
Fottea 2018, 18(1):130-136 | DOI: 10.5507/fot.2017.023
Cyanobacteria are amongst the most abundant, ubiquitous, ecologically and evolutionarily significant microbes on Earth. Unique among the Bacteria in their capacity to be identified using morphology, understanding the evolutionary relationships and describing the diversity of this lineage is both important and challenging. The advent of modern sequencing technology has proven a boon to those studying cyanobacterial systematics as it has provided copious amounts of sequence data (mainly of the 16S rRNA gene sequence). However, this influx of data has also led to taxonomic confusion and recognition of polyphyly in many genera. Thus, the purpose of...
Významná hydrobioložka Prof. RNDr. Alena Sládečková, CSc.
Jana Říhová Ambrožová
Fottea 2018, 18(1):i-iii
Jubilantka se narodila jako Alena Vinniková 20. 4. 1933 v Praze. Její otec byl stavební inženýr – vodohospodář, matka učitelka. V letech 1939 až 1945 navštěvovala základní školu v Praze, odkud přestoupila na Státní anglické reálné
gymnázium (1945 až 1951) a v roce 1951 zde maturovala s vyznamenáním. V letech 1951 až 1956 studovala biologii a chemii na přírodovědecké fakultě Karlovy univerzity v Praze, kde pod vedením Prof. RNDr. Bohuslava Fotta, DrSc. vypracovala
diplomovou práci, zaměřenou tematicky na studium fytoplanktonu dvou severočeských rybníků, Máchova jezera a Břehyňského rybníka u Doks.