Fottea, 2022 (vol. 22), issue 1
Original article
Chara lipkinii (Charales, Charophyceae): a new dioecious Mediterranean species under risk of extinction in the wild and some implications for the taxonomy of the genus Chara
Roman E. Romanov, Sophia S. Barinova, Vyacheslav Yu. Nikulin, Andrey A. Gontcharov
Fottea 2022, 22(1):1-12 | DOI: 10.5507/fot.2021.012 
A new species, Chara lipkinii, was described based on specimens from the Mediterranean, Israel. Dioecy, 10-13 branchlets in a whorl, complete tylacanthous to isostichous displostichous axial cortex with very short solitary spine cells, hardly visible diplostephanous bistipulate short obtuse stipulodes, frequently appearing as haplostephanous, in combination with completely ecorticate branchlets without cortex initials and with 1-3, mainly two nodes with unilateral bract cells distinguish it from species of Chara described to date. Its morphological traits, which are most important in the infrageneric taxonomy described by Wood, point...
Three new Gomphonema Ehrenberg (Bacillariophyta, Gomphonemataceae) species from the lower reaches of Yangtze River, China
Pan Yu, Qingmin You, Yonghong Bi, John Patrick Kociolek, Quanxi Wang
Fottea 2022, 22(1):13-29 | DOI: 10.5507/fot.2021.013
In this study, three new species of the genus Gomphonema from freshwater lakes of the lower reaches of Yangtze River, China. They include G. qii sp. nov. from Yangcheng Lake, G. poyangense sp. nov. from Poyang Lake, and G. longganense sp. nov. from Longgan Lake, and all of these new species were collected on stone. We detailed morphological features of these new species are described based on light microscopy (LM) and scanning electron microscopy (SEM), and the LM and SEM photographs illustrate the size ranges and particular ultrastructure of these new species. G. qii sp. nov. with clavate-lanceolate...
A new species of Trachelomonas (Euglenaceae, Euglenophyceae) from China
Xiao-Die Jiang, Xi Chen, Wan-Ting Pang, Quan-Xi Wang
Fottea 2022, 22(1):30-38 | DOI: 10.5507/fot.2021.014
A new species of Trachelomonas was collected in China. We analysed the specimen based on its morphological and molecular data. The loricae morphological were similar to two other species, T. lefevrei and T. planctonica. However, the new species formed a sister group with T. bernadinensis, T. lefevrei and T. planctonica in the phylogenetic tree. These results suggest it to be a new species, Trachelomonas subplanctonica sp. nov.
Diversity and ecology of benthic diatoms in a mire with narrow pH gradient
Igor Stanković, Marija Gligora Udovič, Mirela Šušnjara, Antun Alegro, Zlatko Levkov
Fottea 2022, 22(1):39-55 | DOI: 10.5507/fot.2021.015
Mires are specific freshwater habitats with great importance for global biodiversity. The present study investigated diatoms in different habitats of a Đon Močvar mire and their relationship with environmental parameters, as well as the use of diatom indicator values and the German Red List for conservation purposes. The study was conducted monthly from January to November 2012. Diatoms were sampled simultaneously with water for physical and chemical properties in three different habitats. A total of 50 diatom taxa were identified. Based on their relative abundance and diversity, habitat-related environmental factors shaped the diatom community when...
Taxonomy and valve morphology of Humidophila species (Bacillariophyceae) from aerophilous habitats in northeastern Argentina, with the description of four new species
Amelia A. Vouilloud, José M. Guerrero, Silvia E. Sala, Julian Simonato, John P. Kociolek
Fottea 2022, 22(1):56-77 | DOI: 10.5507/fot.2021.016
During a survey of the diatoms present in aerophilic microhabitats associated with waterfalls in Misiones Province (Argentina), mainly within Iguazú National Park (N.P.), seventeen taxa belonging to the genus Humidophila have been recorded. Previously, only six species of the genus have been reported for all of Argentina. Of the seventeen taxa considered here, four exhibit a unique combination of features and are proposed as new species. These are H. iguazuensis sp. nov., H. lagartiensis sp. nov., H. misionera sp. nov. and H. sebastianii sp. nov. An additional six previously-described species (H. arcuatoides,...
Geosmin-producing Scytonema foetidum sp. nov. (Scytonemataceae, Cyanobacteria): morphology and molecular phylogeny
Wittaya Tawong, Pongsanat Pongcharoen, Tomohiro Nishimura
Fottea 2022, 22(1):78-92 | DOI: 10.5507/fot.2021.017
A novel Scytonema species, Scytonema foetidum sp. nov. is described by combining morphological and genetic evidences. Two clonal strains of the new species were isolated from a wet soil sample taken from the Khek River in the lower northern part of Thailand. This species is morphologically similar to S. hofmanii, but can be differentiated by a small filament width, conically rounded apical cell, and sheath present throughout the whole trichome. The 16S ribosomal RNA (rRNA), rbcLX, and nifH phylogenetic trees indicated that S. foetidum clearly formed a unique cluster within the Scytonema sensu stricto clade and shared...
Analysis of the Fragilaria rumpens complex (Fragilariaceae, Bacillariophyta) with the description of two new species
Bart Van de Vijver, David M. Williams, Tanja M. Schuster, Wolf-Henning Kusber, Marco Cantonati, Carlos E. Wetzel, Luc Ector
Fottea 2022, 22(1):93-121 | DOI: 10.5507/fot.2021.018
The former Synedra rumpens complex has long puzzled diatom taxonomists. In the nineteenth century, many infraspecific taxa were described as varieties or forms of S. rumpens. In the present study, type material of Synedra rumpens and several infraspecific taxa such as S. rumpens var. fragilarioides and S. familiaris f. parva and f. major was investigated using LM and SEM observations. For comparison, the original material of several other relevant diatom taxa (such as Fragilaria perdelicatissima, F. spinaspeciosa, Synedra campyla, S. vaucheriae var. distans)...
Rhodomonas storeatuloformis sp. nov. (Cryptophyceae, Pyrenomonadaceae), a new cryptomonad from the Black Sea: morphology versus molecular phylogeny
Antonina N. Khanaychenko, Olga V. Popova, Olga A. Rylkova, Vladimir V. Aleoshin, Larisa O. Aganesova, Maria Saburova
Fottea 2022, 22(1):122-136 | DOI: 10.5507/fot.2021.019
We established a new cryptomonad species, Rhodomonas storeatuloformis sp. nov., based on morphological and molecular characters of cultured strain isolated from the Black Sea. Cells are slightly dorsoventrally flattened, obloid in shape, 12-19 µm in length and 5-10 µm in width, with light-brown, parietal H-shaped chloroplast and a central pyrenoid. Two unequal flagella are located subapically in a short V-shaped vestibulum with a ligule on the left side. Cells are covered by a sheet-like papillate perisplast with numerous small underlain ejectosomes; discharged ejectosomes form distinctly visible minute pores. Mid-ventral band is absent....
Three new species of Delicatophycus M.J. Wynne (Bacillariophyta) from China, all possessing apical pore fields
Bing Liu, Yang-Yan Zhou, Saúl Blanco, David M. Williams
Fottea 2022, 22(1):137-151 | DOI: 10.5507/fot.2021.020
Delicatophycus wulingensis sp. nov., D. qinghainensis sp. nov., and D. menyuanensis sp. nov., are described, illustrated, and compared to similar taxa. Two types of apical pore fields (APFs) in the genus Cymbella are defined. The three new Delicatophycus all possess the type II APF found in some species of Cymbella, i.e. the APF is divided by the distal raphe fissure into two areas, one larger than the other. They also share a further three distinct features: variable central dorsal portion of valve, stigmata, and a notch on the dorsal side of the distal raphe fissure. Since there are many species of Delicatophycus...
Luticola jinshaensis sp. nov. (Bacillariophyta), a new freshwater species from Jinsha River, China
Lin Yang, Pan Yu, Quanxi Wang, John Patrick Kociolek, Qingmin You
Fottea 2022, 22(1):152-161 | DOI: 10.5507/fot.2021.021
A new species, Luticola jinshaensis sp. nov. is described from Xiangjiaba reservoir in Jinsha River, China. Observations on the new species were based on light microscopy (LM) and scanning electron microscopy (SEM). Luticola jinshaensis sp. nov. is distinguished from all other species of the genus in having an unusual external areolae structure, where each areola has a cribrum recessed and ornamented with tiny, irregular projections connected with inner wall of areolae raphe. This cribrum is fragile so that the structure may become destroyed by processing of the specimens. A second feature that distinguishes this new taxon is that the...
Personalia
RNDr. Petr Marvan, CSc., passed away on February 7th 2022 at the age of 93
Czech Phycological Society
Fottea 2022, 22(1)
Petr Marvan was a Moravian phycologist, a specialist in taxonomy and ecology of diatoms and biomonitoring, applied mathematics working with optimization of saprobity indices. Petr Marvan had a great general biological overview and was always able to advise. A modest, honest man, a kind teacher and colleague, a staunch optimist with a sense of humor, he has been active until his last days.Petr, thank you for your work, help and friendship.