Fottea, 2014 (vol. 14), issue 1

Genetic and morphological characteristics of two ecotypes of Eustigmatos calaminaris sp. nov. (Eustigmatophyceae) inhabiting Zn- and Pb-loaded calamine mine spoils.

Magdalena Trzcińska, Barbara Pawlik-Skowrońska, Dawid Krokowski, Shin Watanabe

Fottea 14(1): 1-13, 2014 | DOI: 10.5507/fot.2014.001  

Knowledge on species diversity and distribution of eustigmatophycean algae (Stramenopiles) in the environment is currently very limited. Some of them are considered promising organisms for industrial application. Phylogenetic analysis of two strains (E120, E5) of a coccoid microalga isolated from highly
Zn- and Pb-polluted calamine mine spoils revealed that they belong to the genus Eustigmatos. Cells of both strains were morphologically identical. Some features of their vegetative cells and zoospores differed from other described nominal Eustigmatos species. 18S rDNA sequences of E120 and E5 were identical but also differed in two...

Observation on Achnanthes Bory sensu stricto (Bacillariophyceae) from subaerial habitats in Macedonia and comparison with the type material of A. coarctata (Brébisson ex W. Smith) Grunow, A. coarctata var. sinaensis Hustedt and A. intermedia Kützing.

Slavica Tofilovska, Carlos E. Wetzel, Luc Ector, Zlatko Levkov

Fottea 14(1): 15-42, 2014 | DOI: 10.5507/fot.2014.002  

Four species of Achnanthes sensu stricto have been observed in several subaerial habitats/localities in Macedonia. The morphological features of all recorded species have been described based on light and scanning electron microscope observations. Two species posses similar morphological features as already described species and were identified as A. coarctata (Brébisson ex W. Smith) Grunow and A. sinaensis (Hustedt) stat. nov. Two species have unique set of characters that separate them from the known species and are described in this study as A. pseudocoarctata Levkov et Tofilovska sp. nov. and A. prominula Levkov...

Analysis of the type of Achnanthes exigua Grunow (Bacillariophyta) with the description of a new Antarctic diatom species.

Jonathan C. Taylor, Christine Cocquyt, Balasubramanian Karthick, Bart Van de Vijver

Fottea 14(1): 43-51, 2014 | DOI: 10.5507/fot.2014.003  

A study was made of the type material of Achnanthidium exiguum (Grunow) Czarnecki. This often encountered and apparently ubiquitous species was originally described as Stauroneis exilis by Kützing from the island of Trinidad and later re-named as Achnanthes exigua by Grunow. The type material for this taxon (Kützing sample 397), housed in the Van Heurck collection at the National Botanic Garden of Belgium, Meise was investigated and the ultrastructure of this taxon was documented using both LM and SEM observations. A new Antarctic taxon, formerly identified as A. exigua, was described as a new species, Achnanthidium australexiguum...

Planktochlorella nurekis gen. et sp. nov. (Trebouxiophyceae, Chlorophyta), a novel coccoid green alga carrying significant biotechnological potential.

Pavel ©kaloud, Yvonne Němcová, Jaromír Pytela, Nikolay I. Bogdanov, Christina Bock, Sam H. Pickinpaugh

Fottea 14(1): 53-62, 2014 | DOI: 10.5507/fot.2014.004  

Phylogenetic position, morphology and ultrastructure were investigated for biotechnologically remarkable strain Chlorella vulgaris IFR C-111, utilized in various commercial applications. Molecular phylogenetic analyses based on the SSU and ITS rDNA data revealed that the strain IFR C-111 forms a distinct lineage within the Parachlorella-clade in Chlorellaceae. We describe this organism as a new genus and species, Planktochlorella nurekis. Vegetative cells of this newly recognized species are spherical, possessing a single pot-shaped chloroplast with starch-covered pyrenoid. Asexually it reproduces by the formation of 2-16(-32)...

Strain survey on three continents confirms the polyphyly of the genus Pediastrum (Hydrodictyaceae, Chlorophyceae).

Mrutyunjay Jena, Christina Bock, Chhandashree Behera, Siba P. Adhikary, Lothar Krienitz

Fottea 14(1): 63-76, 2014 | DOI: 10.5507/fot.2014.005  

Approximately 100 new strains of the Pediastrum-phenotype were isolated from inland waters of India, eastern and southwestern Africa, and Germany and were studied by light and scanning electron microscopy. The 18S rRNA and ITS genes of 28 strains were sequenced and compared with 25 sequences of
Hydrodictyaceae from the GenBank database. Phylogenetic analyses confirmed the polyphyly of Pediastrum. The new species Sorastrum pediastriforme was described. This species resembled morphologically Pediastrum, however, the phylogenetic analyses revealed its affiliation within the genus Sorastrum. Furthermore, the following...

New species in the genus Muelleria (Bacillariophyta) from the Maritime Antarctic Region.

Bart Van de Vijver, Ralitsa Zidarova, Kateřina Kopalová

Fottea 14(1): 77-90, 2014 | DOI: 10.5507/fot.2014.006  

During a survey of the freshwater aquatic and limno-terrestrial diatom flora of the Maritime Antarctic Region, six taxa belonging to the genus Muelleria that could not be identified were observed. Based on detailed LM and SEM observations, these six taxa have been described as new taxa: Muelleria desseiniana
sp. nov., M. levkoviana sp. nov., M. nogae sp. nov., M. spauldingiana sp. nov., M. subsabbei sp. nov. and M. undulatoides sp. nov. Comments are made on their taxonomic position and how they can be distinguished from other species in this genus. Brief notes on the ecology and distribution of the six...

Staurosira longwanensis sp. nov., a new araphid diatom (Bacillariophyta) from Northeast China.

Patrick Rioual, Eduardo A. Morales, Guoqiang Chu, Jingtai Han, Dong Li, Jiaqi Liu, Qiang Liu, Jens Mingram, Luc Ector

Fottea 14(1): 91-100, 2014 | DOI: 10.5507/fot.2014.007  

Staurosira longwanensis sp. nov. is described from Sihailongwan maar lake, northeast China. The morphology of this new species is documented with light and scanning electron micrographs and discussed in comparison with several small species of Fragilariaceae. Staurosira longwanensis belongs in the genus
Staurosira since it shares many features with taxa currently ascribed to it such as the position and characteristics of the spines, the characteristics of the areolae and apical pore fields. Apart from the type locality, S. longwanensis also occurs in another volcanic lake in northeast China, with circumneutral and oligotrophic...

Freshwater diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean).

Barbora Chattová, Marc Lebouvier, Bart Van de Vijver

Fottea 14(1): 101-119, 2014 | DOI: 10.5507/fot.2014.008  

Diatom and water chemistry samples were collected during the austral summer of 2007 from lakes, streams and bogponds on Ile Amsterdam (TAAF), a small island located in the southern Indian Ocean. A diverse diatom flora of 104 taxa was found, dominated by several Pinnularia taxa, Frustulia lebouvieri, Kobayasiella subantarctica, Eunotia paludosa, E. muscicola and Planothidium subantarcticum. Biogeographically, the Ile Amsterdam freshwater diatom flora is composed of cosmopolitan, sub-Antarctic and endemic elements. The biogeographical analysis showed that almost 17% of all observed taxa can be considered endemic to Ile Amsterdam...