Horst Lange-Bertalot's research while affiliated with University of Szczecin and other places

Publications (148)

Article
Eunotia paludosa is an abundant and frequent diatom species in ombrotrophic, Sphagnum-dominated bog ponds in Europe. Analysis of the type material from Mandling, Austria, revealed that our currently accepted concept of E. paludosa, based on morphology, was incorrect. The valves in the type population of E. paludosa possess distinct, relatively larg...
Article
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Freshwater biodiversity is disproportionally endangered and under-prioritized. Algal Red Lists literature is very limited, and there are only two editions of a single diatom-specific Red List (developed for Germany), in spite of the importance of diatoms for biodiversity and global ecosystem functioning. We used and analysed the new diatom Red List...
Article
Synedra planktonica was originally described by Hains and Sebring from a freshwater locality in the southeastern USA using light and transmission electron microscopy. The authors placed S. planktonica into the genus Synedra Ehrenberg because of its solitary habit and lack of marginal linking spines. Since the original description of S. planktonica,...
Article
A faintly heteropolar Brachysira species, with an acutely rounded headpole and a base pole which is sometimes slightly protracted, found in two lakes in northern Italy and Corsica, is described and named Brachysira chiaruccii sp. nov. This proposed new species can be differentiated from similar species by recognizable characters or character combin...
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Using light (LM, including plastid characterization on fresh material) and scanning electron microscopy (SEM), as well as a thorough morphological, physical, chemical, and biological characterization of the habitats, the present study aims at describing three species new to science. They belong to the genera Eunotia Ehrenb., Planothidium Round and...
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The subgenus Rhoicosphenula Lange-Bertalot has a unique character combination that differentiates it from Gomphosphenia subgen. Gomphosphenia Lange-Bertalot. In particular, Rhoicosphenula has striae/areola features that are similar to Gomphosphenia, but is differentiated from that genus by also having pseudosepta present on both poles of the valves...
Article
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The diatom genus Tabellaria Ehrenberg is one of the most widely distributed genera in freshwaters, both in benthos and phytoplankton. It is rather frequent in unpolluted, circumneutral to slightly acidic and poorly mineralized lakes, streams and peat bogs. Despite being studied intensively in the last decades, the taxonomy of this genus is still un...
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The species names Achnanthidium nollii, Halamphora hassiaca, Halamphora streckerae, and Nedium lucinense are validated. The taxonomic treatments include also taxa of Achnanthes, Chamaepinnularia, Mastogloia, Navicula, and Pinnularia. Nomenclatural issues in Halamphora obscura are discussed.
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Background Rapa Nui (Easter Island = Isla de Pasqua) is of volcanic origin, best known for about 900 man-made stone statues known as moai . It is one of the most isolated inhabited islands on Earth and studies on the diatoms of Rapa Nui are very few. Methods Light (LM) and electron microscopic (SEM) observations of a single sample collected from R...
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A water sample was obtained from an arheic oasis in the deep Sahara Desert, the Gueltates Afilal in Tamanrasset (Algeria). Five diatom strains were isolated, cultivated and identified as Tryblionella apiculata, Nitzschia supralitorea, Fistulifera saprophila, Navicula veneta and Thalassiosira pseudonana using a combination of scanning electron micro...
Article
A new diatom genus, Gogorevia, is described on the basis of an integrated molecular and 22 morphological investigation. Two species are described from Vietnam the generitype, G. rinatii sp. nov. and G. ovalis sp. nov. These species share many of the same morphological features with Achnanthes exigua and allied taxa that were previously transferred...
Article
A new diatom genus, Gogorevia, is described on the basis of an integrated molecular and morphological investigation. Two species are described from Vietnam the generitype, G. rinatii sp. nov. and G. ovalis sp. nov. These species share many of the same morphological features with Achnanthes exigua and allied taxa that were previously transferred to...
Article
A small unidentified species of Navicula was observed in sandy sediments of a Quaternary spring near Lodz in Central Poland. The species was thoroughly analyzed using light (LM) and scanning electron (SEM) microscopy. It was compared to established species of Navicula from available published sources and its assignment to an established taxon was u...
Article
A second species of the genus Sichuaniella Yan L. Li, Lange-Bertalot & Metzeltin 2013 from China is described as new to science. The new species, S. dequinensis spec. nov., is documented with light and scanning electron microscopy. This new species is distinguished from the only other species of the genus, S. lacustris, by having a higher density o...
Article
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In many marine littoral and sublittoral benthic habitats, we find small diatoms with few features resolvable with light microscopy (LM) other than internal costae across their valves. While classically those internal costae have defined their identification and classification, the use of electron microscopy and of molecular data have started to rev...
Article
Die Diatomeen im Gebiet der Stadt Treuchtlingen. Erwin Reichardt. 2018. 2 volumes with linen cover. 1184 pp. with more than 10,600 figures on 451 plates. Selbstverlag der Bayerischen Botanischen Gesellschaft, Munich, Germany. €330.00 [hardback: ISBN 978-3-00- 060715-8]. Die Diatomeen im Gebiet der Stadt Treuchtlingen represents the work of a lifeti...
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Background and aims – The detailed analysis of algae and cyanoprokaryotes in a heterogeneous group of spring habitats (including all the different typologies) of the northern Apennines (Emilia-Romagna Region, Italy) revealed a new Amphora species in a small mountain flowing spring with low conductivity, and a new Halamphora species in a large, inla...
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Background and aims – The samples on which this study is based were collected in two streams in Puerto Rico as part of a long-term monitoring program conducted by the National Ecological Observatory Network (NEON). Detailed study of the diatom assemblages revealed the occurrence of a new diatom species belonging to the genus Adlafia. Methods – The...
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We describe the new species Gomphonemopsis sieminskae from brackish waters of the East China Sea littoral near Ningbo, China. Two diatom strains isolated from Ulva sp. were successfully grown, then analyzed by light (LM) and scanning electron (SEM) microscopy. The new species is compared to known Gomphonemopsis species, and similarities to G . pseu...
Article
More or less needle-shaped species of Fragilaria s.s. are difficult to identify. Here we contribute to the taxonomy of this difficult group by describing three species new to science from very low conductivity mountain freshwater environments. two of the new species resemble taxa established by Kützing in the early 19 th century: F. rumpens and F....
Article
We document the morphology of 15 species of Eunotia from freshwater habitats in the Falkland Islands using light and electron microscopy, and describe four new species, Eunotia australovalida, Eunotia inconspicua, Eunotia floweriana and Eunotia latecapitata. Diatom assemblages were studied from a range of habitats on East Falkland, West Falkland, S...
Article
During a study of the diatoms of streams in Cyprus, two Ulnaria species were difficult to identify using current taxonomic concepts, which created difficulties when trying to understand their ecological preferences. as a result, both taxa were investigated in detail using light (LM) and scanning electron (SeM) microscopy. Literature searches showed...
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The genus Michelcostea gen. nov. is described as a new genus based on light and scanning electron microscopy observations made on valves formerly identified under the name of Navicula bryophiloides var. linearis, a taxon invalidly described by Maillard from Iles Kerguelen. The new genus is characterized in having a deep mantle, uniseriate to biseri...
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Achnanthes oblongella Østrup and Achnanthes saxonica Krasske have long been regarded as taxonomic synonyms by many diatomists around the world. Here we investigated the original material of A. oblongella originally described from Thailand and considered to be a cosmopolitan species, and compared it with twenty-fi ve freshwater epilithic populations...
Article
In July 2017, Lange-Bertalot et al. (2017) published a revised and translated version of Hofmann et al. (2013)’s book on freshwater benthic diatoms of Central Europe. The revised edition includes a few nomenclatural novelties which neither conform to the Melbourne Code (McNeill et al. 2012) nor to the upcoming Shenzhen Code (see Turland et al. 2017...
Book
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Compared with the Holarctic region, the occurrence and distribution of diatoms are poorly known in the continental waters of South America and other tropical regions. Although recently many important studies concerning these somewhat neglected areas have been conducted, the complete picture of the biodiversity of the genus Eunotia Ehrenberg is far...
Book
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The original German - language edition was published in 2013 as 'Diatomeen im Süßwasser - Benthos von Mitteleuropa. Bestimmungsflora Kieselalgen für die ökologische Praxis. Über 700 der häufigsten Arten und ihre Ökologie, by Gabriele Hofmann, Marcus Werum & Horst Lange- Bertalot, corrected edition 2013, edited by H. Lange - Bertalot.' 26 genera ar...
Article
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The Diablas wetlands are found on the south coast of Isabela Island on the Galapagos archipelago, consisting of one main lagoon and a series of smaller pools and lagoons. Recent studies have revealed a freshwater-brackish diatom assemblage in the Diablas wetlands, containing a relatively large number of novel taxa. This study gives formal descripti...
Article
The stalked diatom Didymosphenia is being thoroughly studied because it can cause serious nuisance blooms. The species most commonly involved is D. geminata. Although Didymosphenia species occur in running waters and lakes, published reports generally refer to lotic habitats. Given the applied interest in Didymosphenia, as well as its suitability f...
Article
Numerous questionable extant populations of Diploneis with cribrate areolae are morphologically compared (in LM and SEM) to resembling established taxa. In most of these examinations the types are available and documented in the literature by several authors during the last forty years. All taxa in question belong ecologically to the minority of Di...
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Diatom assemblages in carbonate spring habitats at low elevations, with low discharge, and affected by direct human impacts were studied only recently and in some geographic areas. We describe and characterize the ecology of a new Navicula species from springs with these characteristics within the basin of the River Adige in the south-eastern Alps...
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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...
Article
Platichthys, a new genus of canal raphe bearing diatoms, is formally described following analysis of the frustule morphology using LM and EM examination. The genus type originates from a thermal spring in the temperate climate zone of Chile, and an example of the second member of this new genus is observed from a coastal lagoon on the Galapagos Isl...
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The freshwater diatoms of the French Guiana have received little attention so far. A new diatom genus, Lacuneolimna, based on the species Eolimna zalokariae, is described from a small rainforest stream. Numerous ultrastructural features differ from the genus Eolimna, notably the pluriseriate striae lying between relief-like elevated virgae and depr...
Article
With this publication, we start the process of lectotypification of diatom taxa described from Lake Baikal during the first part of the 20th century. In this initial effort, six species described by Skabitschewsky in 1936 from Ajaja Bay are lectotypified using a type slide from his collection. Species descriptions are emended based on LM observatio...
Article
Three new species of the genus Eolimna Lange-Bertalot & Schiller are described from benthic samples from Lake Baikal: E. metafarta sp. nov., E. buryatica sp. nov. and E. simsiae sp. nov. All three are illustrated with LM and SEM micrographs. Comparison with similar species are provided. The taxonomic history of Navicula farta Hustedt, originally de...
Article
During the study of diatom assemblages inhabiting the coastal zone of San Francisco Bay and the nearby Pacific Ocean a number of species which were difficult to accommodate in any established taxa have been investigated. In previous publications nine species of Navicula and Fogedia krammeri have been described as new. In this paper, results are pre...
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Four small-celled taxa are presented and described – Planothidium werumianum, P. pumilum, P. rhombiculum and P. rostratoholarcticum. Planothidium werumianum, P. pumilum and P. rhombiculum are proposed as new to science and P. rostratoholarcticum as a new name for Achnanthes lanceolata var. rostrata Hustedt 1911. The latter, coming from Germany, is...
Article
Background and aims – An unidentifiable naviculoid diatom was found in several small rivers of Germany over some years of routine water monitoring. Since it occurred rather abundantly in places taxonomical and ecological definition is required. Methods – Acid-cleaned diatom material, mounted in Naphrax, was observed and photographed in a light micr...
Article
This paper is a continuation of our study on the recent pennate diatom assemblages of Lake Baikal. Four species belonging to the genus Cavinula are studied and described as new for science. The description of C. jasnitskii sp. nov., C. uschkaniensis sp. nov., C. dybowskii sp. nov. and C. buben sp. nov. is based on extensive analysis in light (LM) a...
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While conducting surveys of freshwater algae from the Hawai'i Islands, we encountered several diatom species and populations belonging to the genus Diadesmis, subgenus Paradiadesmis. Upon closer examination of valve morphology with scanning electron microscopy, the species and populations assigned to Paradiadesmis differed considerably in structure...
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Background and aims – The past few years, the limnoterrestrial and aquatic diatom flora of the entire Antarctic Region (sub-Antarctic islands, Maritime Antarctic Region, Antarctic Continent) is currently under revision. One of the genera that still needed a revision is the genus Eunotia, quite common in wet to semi-wet moss vegetations in the sub-A...
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Diatoma polonica, a species first observed in samples from the Western Carpathians river systems in southern Poland, is described as a species new to science. The new species status resulted from the fact that the dimensions of cells found did not fit any of the diagnoses given in the literature for the European Diatoma taxa established so far. The...
Conference Paper
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Spring habitats host highly-interesting diatom assemblages for different reasons: they are multiple ecotones (groundwater/surface water, aquatic/terrestrial, springhead/springstream system linkages); they occur in a large variety of types and combination of environmental variables (from shaded to exposed, from low-conductivity to saline, from prist...
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Getting to know the response of different groups of aquatic organisms tested in altered thermal environments to environmental conditions makes it possible to understand processes of adaptation and limitation factors such as temperature and light. Field sites were located in three thermally abnormal lakes (cooling system of power plants), in eastern...
Article
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The new species Navicula meulemansii Mertens, Witkowski et Lange-Bertalot sp. nov. is described after study by light microscopy and scanning electron microscopy. Based on new morphological information, the relationship with other taxa is discussed. Navicula meulemansii has a wide geographical distribution in coastal brackish waters (The Netherlands...
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Ehrenberg's material of all 11 syntype localities for the basionym of Hantzschia amphioxys ( Eunotia amphioxys), were studied and pictured; this taxon is lectotypified by a specimen from Labrador, Canada. This taxon is also the type of the name of the genus Hantzschia Grunow, which is herewith also lectotypified by this specimen. In order to be abl...
Article
A new genus of naviculoid diatoms is proposed with Navicula gibbosa Hustedt as type species. Frustule and valve morphology, in particular the pattern of fine structures differs distinctly from all established genera of the Naviculaceae. Closely related though not congeneric are the genera Frankophila Lange-Bertalot 1997 and Hygropetra Krammer & Lan...
Article
The large-celled Navicula petrovii sp. nov., has distinct amphoroid symmetry and is described from recent sediments of the Black Sea coast of Crimea. In the past this species was identified by Peragallo from the Mediterrenean Sea as Amphora scabriuscula and later transferred by Mereschkowsky to Navicula. Our LM and SEM studies revealed that N. petr...
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Navicula clementis Grunow is presented by micrographs from Neogene fossil deposits of the type location Dúbravica. At least three extant populations have barely more in common with Grunow’s taxon than the remarkable two unilaterally situated stigmoids at the central nodule. Due to considerable differences in valve outlines and dimensions, stria pos...
Article
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This paper describes five new Cymbella, one new Cymbopleura and one new Placoneis species from the late Pleistocene of the Jianghan Plain in China, based on light-and scanning electron microscopy of valve morphology. The characteristic morphological features of the seven new species differ from known established taxa by valve shape, both the centra...
Article
Algae samples were collected off the moist walls of a sandstone overhang in the south eastern Free State, South Africa. The samples were dominated by Nostoc spp., the colonies of which were up to 10 mm thick. A number of diatom species were found living in-between the Nostoc colonies, one of which is new to science. Cholnokyella aerophila is descri...
Article
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This paper proposes a new monoraphid genus Gliwiczia Kulikovskiy, Lange-Bertalot & Witkowski, separated from Achnanthes sensu lato. Here we describe four species G. skvortzowii Kulikovskiy, Lange-Bertalot & Witkowski, G. tenuis Kulikovskiy, Lange-Bertalot & Witkowski, G. latarea Kulikovskiy, Lange-Bertalot & Witkowski and G. vixcalcar Kulikovskiy,...
Article
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The focus of this study is the benthic diatom flora of the coastal zone of the Black Sea, in particular that of the Ukrainian part of the Crimean Peninsula. Critically revised taxa belonging to the genus Lyrella Karayeva (Bacillariophyta: Lyrellaceae) are presented. We compared information on Navicula section Lyratae, published over the last few de...
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Article Bicudoa amazonica gen. nov. et sp. nov. (Bacillariophyta)—a new freshwater diatom from the Amazon basin with a complete raphe loss in the Eunotioid lineage Abstract Bicudoa amazonica C.E. Wetzel, Lange-Bertalot & Ector gen. nov. et sp. nov. is described using light and scanning electron microscopy. It differs from 'araphid' genera by a uniq...
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Spring habitats are highly diverse and have a mosaic microhabitat structure. They are endangered by diffuse exploitation as drinking-water resources, an impact likely to increase with climate change. Diatoms were sampled from stones and bryophytes in 110 nonthermal, near-natural springs in the southeastern Alps (Trentino) and 16 carbonate springs i...
Article
Article Bicudoa amazonica gen. nov. et sp. nov. (Bacillariophyta)-a new freshwater diatom from the Amazon basin with a complete raphe loss in the Eunotioid lineage Abstract Bicudoa amazonica C.E. Wetzel, Lange-Bertalot & Ector gen. nov. et sp. nov. is described using light and scanning electron microscopy. It differs from 'araphid' genera by a uniq...
Article
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Cymbopleura pyrenaica sp. nov. (Bacillariophyceae) and some other Cymbopleura species rarely observed in some lakes of the French Pyrenees. During a survey of the diatoms from French Pyrenean lakes, a new species of Cymbopleura, Cymbopleura pyrenaica sp. nov. was found. The detailed morphology of this taxon was examined using light and scanning ele...
Article
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Mires are very selective habitats, and the colonisation by specifically adapted organisms makes them very important both for nature conservation and environmental education. They have, however, been threatened by different types of impacts. Our objective was to study diatoms in stations representative of the main typologies in the Site of Community...
Article
During a survey of the diatoms from French Pyrenean lakes, a new species of Cymbopleura, Cymbopleura pyrenaica sp. nov. was found. The detailed morphology of this taxon was examined using light and scanning electron microscopy. The new species most closely resembles Cymbella laevis Naegeli, but the absence of apical pore fields places Cymbopleura p...