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Introduction
Publications
Publications (55)
Issues related to evolution of algal chloroplasts are considered. The position of algae on the Tree of Life is discussed. Algae are now included in five of the monophyletic eukaryotic supergroups: Archaeplastida (Glaucocystophyta, Rhodophyta, Prasinodermophyta, Chlorophyta, and Charophyta), TSAR (Ochrophyta; Dinophyta; Chlorarachniophyta; and photo...
The scanning electron microscopy study of phytoplankton from the Nizhny Tagil Reservoir (Sverdlovsk Region, Russia) has revealed some small-sized diatom species of Sellaphora, including a new for Russian territory species, S. archibaldii. Analysis of morphometric features of S. archibaldii (striae and areolae number in 10 µm) has shown the inconsis...
The genus Shionodiscus (Thalassiosirales, Thalassiosiraceae) includes species that have strutted processes with long inward but reduced outward extensions, a labiate process typically located on the valve face, distant from the margin. Shionodiscus species inhabit the marine environment, and the genus includes both living and fossil species. In the...
New combinations for one species and five forms of diatoms in the genus Shionodiscus are published. The lectotype of Isotachis woronowii is designated in accordance with Arts. 9.3, 9.11, and 9.12 of the International Code of Nomenclature for algae, fungi, and plants.
A brief review of the main publications containing information on the terminology of diatom valve shapes is given. This communication presents the results of our supplemented generalization and clarification of terms for radial valves and valves, that are symmetrical to the apical axis, which are used to describe the morphology of diatoms. As in th...
Different problems concerned the evolution of algal chloroplasts are reviewed. Progress in the studies on the
classification of eukaryotes and understanding of the position of algae on the Tree of Life are discussed. Currently, among the numerous monophyletic supergroups of eukaryotes, five supergroups contain representatives of algae: Archaeplasti...
A diatom analysis of a peat deposit from Shemya Island (Aleutian Arc, USA) is performed, and the dynamics of the diatom community are described. According to the radiocarbon dating, the formation of the deposit began 9300 cal. years BP. Principal component analysis made it possible to relate the dynamics of the diatom community to certain environme...
This electron microscopy study of Achnanthes brevipes from mineralized tributaries (Solyanka, Chernavka, Khara) of the hyperhaline Lake Elton (Volgograd Region) provides new data on the variability of quantitative diagnostic characteristics (valve length, number of striae and areolae in 10 μm). Based on the original and published data, a refined di...
Meringosphaera mediterranea is the type species of the genus. The species is widely distributed in the polar, temperate, and tropical marine waters. For many years the systematic position of this species was unclear (the most common opinion was that the species is xanthophyte or chrysophyte alga), and its affiliation to centrohelids was clarified q...
Frozen permafrost Pleistocene mammal carcasses with soft tissue remains are subject to intensive study and help elucidate the palaeoenvironment where these animals lived. Here we present an inventory of the freshwater fauna and flora found in a sediment sample from the mummified Woolly Mammoth carcass found in August 2010, from the Oyogos Yar coast...
Theoretical and practical problems associated with the concept of the genus in diatoms are discussed.
Algae that inhabit extreme environmental conditions are often capable of synthesizing and storing unique biochemical inclusions. The diatom alga Nitzschia sp., strain Z-6, isolated from the meromictic Lake Shira, under conditions of nitrogen starvation, is capable of accumulating rare PUFAs (polyunsaturated fatty acids) that may be useful for biote...
The most dangerous invasive species of Russia (TOP-100) / Eds. Yu.Yu. Dgebuadze, V.G. Petrosyan, L.A. Khlyap. M.: KMK Scientific Press, 2018, 688 p.
The book is devoted to biological invasions of alien species. It is the first presentation of the list and summarized information on the 100 worst invasive species (TOP-100) in Russia which can pose th...
Проведен анализ комплекса животных и растительных остатков в шерсти, найденной на р. Аллаихе (Республика Саха, Российская Федерация). Изучена структура шерсти, а также проведено радио-углеродное датирование как самой шерсти, так и вмещающих органических остатков, которое по-казало их возрастную неоднородность. В тафоценозе шерсти выявлены различные...
Data on diatom complexes from bottom deposits of Lake Karakel’ (the Karachayevo-Cherkessian Republic) have been analyzed. The principle of unification of bioindication methods has been applied. The hydrological parameters of lake water (temperature, pH, and saprobithy) have been reconstructed over a period of 2000 years. The results of isotopic dat...
Представлены результаты изучения диатомовых водорослей из торфяного отложения голоцена с острова Шемья (Алеутские острова, США). В работе были исследованы торфяные отложения мощностью 385 см (формирование отложения началось более 9500 лет назад). Было обнаружено 67 таксонов диатомовых водорослей, принадлежащих к 31 роду, 17 семействам, 8 порядкам и...
Results of a study of diatoms from Holocene peatbog sediments from Shemya Island (Aleutian Islands, United States) are presented. The column of peat sediments (385 cm depth) was investigated (formation of peat sediments began more than 9500 years ago). Sixty-seven taxa of 31 genera, 17 families, eight orders, and three classes were identified. Acco...
In Moscow oblast, Thorea hispida (Thore) Desv. was first recorded at the beginning of the 20th century. Subsequently, T. hispida was found in 2004 in Moscow River within the territory of Moscow, where it still occurs. This species is included in the Red List of the Russian Federation, the Red List of Moscow oblast, and the Red Lists of some Europea...
Based on a unique combination of morphological characters, a new species of the raphid pennate diatom genus Pinnularia was described from the sediments in MacDonald Point peat-bog, Shemya Island, Alaska, USA. P. arkadii sp. nov. has linear valves with parallel margins, widely rounded ends and central area forming wide fascia; striae are relatively...
Pleurosira laevis was first recorded in the Zarafshan River, one of the largest rivers in Uzbekistan. The populations from Uzbekistan were examined using light and scanning electron microscopy. The distribution,
morphology, and ecology of this species are described. This diatom species is likely to be brought occasionally together with the intentio...
В одной из самых крупных рек Узбекистана – реке Зарафшан, найден новый для данного региона вид
диатомовой водоросли – Pleurosira laevis. Популяции из Узбекистана были изучены с помощью световой и электронной микроскопии. Приводятся сведения о распространении, морфологии и экологии данного вида. Предполагается, что этот вид диатомовой водоросли мог...
A short account of the life of Boris Vasil’evich Skvortzov (1896–1980) is presented. Some details of his background, his family and his legacy are documented. A short summary of his achievements are included.
We define “traditional taxonomy” as the approach based on deep, long-term investigations of a taxonomic group, performed by specialists. The alternative is a ‘machinism’ based on the idea that a new method applied at once, or a sequence of some technical operations, is more important for resolving taxonomic problems than are long-term routine (“des...
It was shown that, in contrast to higher plants, lower plants are a group of organisms that are very different in origin and kinship.
A new small-celled species of the genus Sellaphora is described from Lake Glubokoe (Moscow Region, European Russia). For another taxon (also small-celled), a new combination in the same genus is proposed. Both species were studied with light and scanning electron microscopy. Analysis of valve morphology supported assignment to the genus Sellaphora....
Twentyeight species of Navicula genus (Diatomophyceae) have been identified in Moskva River in the vicinity of Zvenigorod Biological Station named after S.N. Skadovskii. Seven species have been regis tered for the first time in Moskva River, two species, for Russia. All the found species are described briefly and supported by the original microphot...
New data on the frustule morphology of a single known species of the genus Sichuaniella — S. lacustris are provided. Apical pore fields of unusual structure, resembling single multiseriate stria on the external valve surface, together with cis-type of frustule symmetry are revealed. Another interesting feature is fusion of valve and valvocopula in...
Results of light and scanning electron microscopy investigations of valves of two freshwater achnanthoid diatoms are provided. Based on the structure of external terminal raphe endings, represented by simple pores, and cocconeoid habitus Achnanthes joursacensis Hérib. is transferred to the genus Platessa. Achnanthes rostellata A. Cleve is transferr...
A method of graphical analysis of the diatom assemblages’ taxonomic structure allows revealing two main scenarios of their transformations. The first scenario is determined by the external abiotic influence during which the internal ecosystem parameters remain stable. The second scenario is determined by the change in the internal ecosystem paramet...
Anew diatom species, Gomphonema megalobrebissonii sp. nov., is described from the sediments of Lake Glubokoe, European Russia. Based on morphological observations, this taxon is part of the G. acuminatum species complex and appears most closely related to G. coronatum Ehrenberg. Both species possess roughly punctate striae, made more complicated by...
Frustule morphology of 9 species from the araphid diatom genus Staurosira Ehrenberg found in Lake Glubokoe (Moscow Region, Russia) was studied both with light and scanning electron microscopy. On the basis of morphological data new combination Staurosira neoproducta (Lange-Bertalot) Chudaev et Gololobova comb. nov. is proposed. Importance of some f...
A new species of ‘fragilarioid’ diatom belonging to the genus Punctastriata Williams & Round is described from Lake Glubokoe (Moscow Area, Russia). P. glubokoensis sp. nov. shares particular features of the genus Punctastriata: multiseriate striae, lack of rimo-portulae, presence of a single apical pore field and a single apical depression. It has...
Diatomic complexes from Upper Holocene sediments in Lake Glubokoe (Moscow Province) are analyzed. A unified reconstruction
method is first applied to three most important hydrologic characteristics: temperature, cation-anion balance, and the concentration
of biogenic substances. The species composition of diatomic complexes is studied with account...
С помощью СЭМ изучена микрморфология теки Peridinium gatrunense Nygю из озера Эль Падре (Мексика)
The dinophytic species Peridinium gatunense Nyg., new for continental water bodies of Mexico, was found in Lake El Padre (Central America, the Yukatan Peninsula). The thecal micromorphology of this species was studied by scanning microscopy. Problems on geographical variability of morphological characters are under discussion. The paper is illustra...
In the course of our examination of samples of Cladocera from South America and subantarctic islands in the collection of the Swedish Museum of Natural History, Stockholm, we found some type material of Sven Ekman, unrecognized earlier, as well as other samples described in his publications (Ekman 1900, 1905). A single specimen of Pleuroxus scopuli...
