Generic Composition Research Articles

Coral assemblages and environments from Bajocian reefs in the Western Carpathians

The systematics of the coral assemblages of the Vršatec Limestone from the Pieniny Klippen Belt (Western Carpathians) that inhabited the NW Tethyan margin during the Bajocian is revisited here based on a new and extensive sampling of coral specimens collected at four outcrops. The assemblage consists of 12 genera and 13 species, including the new species Proaplophyllia slovakensis and the first Bajocian occurrence of the genus Enallhelia. Morphometric analyses also allow us to synonymize multiple species citations of the genus Thecosmilia into a single species. A quantitative study shows that five genera tend to be most common at all outcrops, namely Cladophyllia, Dendraraea, Isastrea, Periseris, and Thecosmilia, documenting relatively high homogeneity in the qualitative generic composition of coral assemblages but quantitative differences among the four outcrops. Coral specimens are frequently affected by macroborings (Gastrochaenolites, Entobia, and Trypanites) and coated by microbialitic components. We suggest that these reefs grew in the optimum of the Bajocian reefal window (i.e., shallow-water photic environments above storm wave base). We also identify three traps (typological, nominal, and induction traps) that led in the past to the false stratigraphic attribution of these reefs, when they were erroneously assigned to the Oxfordian rather than to the Bajocian.

Features of intestinal microbiota biodiversity in patients with inflammatory intestinal diseases and metabolic disorders (literature review)

Relevance. Pathology of non-infectious genesis is currently playing a leading role in the structure of overall morbidity of the population. The incidence of inflammatory bowel diseases increases all over the world. The severity of inflammatory bowel diseases complicates the presence of comorbid pathology, metabolic disorders, which lead to disability and the risk of premature death. Currently available diagnostic measures allow to detect disorders at the stage of clinical manifestations. There are several factors causing the development of pathological changes at the early stage including the peculiarities of intestinal microbiome formation and the predominance of certain microorganism clusters with the subsequent formation of a biotype, which may allow diagnosing the disease at a latent stage.Aim: To evaluate the role of the intestinal microbiota in the formation of inflammatory bowel diseases and metabolic disorders according to the data of national and foreign literature.Material and Methods. The review of literature on this topic was carried out based on the analysis of data obtained from the publications indexed in PubMed, Web of Science, Scopus, Google Academy, and eLibrary.ru databases over the past 10 years.Results. Data on the role of intestinal microbiota in the development of changes in patients with inflammatory bowel diseases and metabolic disorders (obesity, impaired glucose tolerance, and diabetes mellitus) were revealed. New potential mechanisms for the development of type 2 diabetes mellitus were identified, and the features of the generic composition of the flora in patients with comorbid pathology were described.Conclusion. The obtained results suggest that further research is required to improve understanding of this pathology and to create the methods for correcting the gut microbiota in case of abnormal findings.

Changes in the Human Gut Microbiome Caused by the Short-Term Impact of Lactic Acid Bacteria Consumption in Healthy People.

The gut microbiome is one of the main factors affecting human health. It has been proven that probiotics can regulate the metabolism in the host body. A large number of people use probiotics not as medicines, but as a prophylactic supplement. The aim of our study was to evaluate the effect of lactic acid bacteria on the gut microbiome of healthy people using the V3 region of the 16S rRNA gene. Our study showed changes in the generic composition in the gut of healthy people when taking the supplement. There was an increase in the members responsible for the production of short-chain fatty acids in the gut of the host (Blautia, Fusicatenibacter, Eubacterium hallii group, Ruminococcus), as well as bacteria that improve intestinal homeostasis (Dorea and Barnesiella). There was also a decrease in the abundance of bacteria in the genera Catenibacterium, Hungatella, Escherichia-Shigella, and Pseudomonas, associated with an unhealthy profile of the human gut microbiome. An increase in members of the phylum Actinobacteriota was also observed, which has a positive effect on the host organism. Our results indicate that short-term prophylactic use of lactic acid bacteria-based supplements can be effective, as it contributes to a beneficial effect on the gut microbiome of healthy people.

Reconciling Hard Skills and Soft Skills in a Common Framework: The Generic Skills Component Approach.

The distinction between hard and soft skills has long been a topic of debate in the field of psychology, with hard skills referring to technical or practical abilities, and soft skills relating to interpersonal capabilities. This paper explores the generic composition of any skill, proposing a unified framework that consists of five distinct components: knowledge, active cognition, conation, affection, and sensory-motor abilities. Building upon previous research and theories, such as Hilgard's "Trilogy of Mind", the generic skill components approach aims to provide a comprehensive understanding of the structure and composition of any skill, whether hard or soft. By examining these components and their interactions, we can gain a more in-depth understanding of the nature of skills and their development. This approach has several potential applications and implications for various fields, including education, training, and workplace productivity. Further research is needed to refine and expand upon the generic skill components theory, exploring the interactions between the different components, as well as the impact of contextual factors on skill development and use.

Generating citywide street cross-sections using aerial LiDAR and detailed street plan

Precise information on spatial configurations of urban spaces, such as streets, is essential for investigating complex interrelationships between the quality of life, livability, and mobility. Street cross-sections can be central for such research as they depict the allocation of urban space by detailing the streetscape's layout and dimensions, including driveways, sidewalks, bikepaths, median strips, trees, adjoining buildings and open spaces, and shadows. However, creating an accurate description of the real world as a three-dimensional representation and translation into cross-sections is challenging due to the requirement of multiple data sources, such as road layouts with widths, height information, and, optionally, high-resolution aerial imagery. Without such datasets, the cross-section drawings are limited to manual measurements, which are difficult to extend to a city scale. This study aims to develop a method to automatically generate street cross-sections for the entire city of Berlin based on an aerial Lidar dataset and a city street plan. The study also includes shadows as a part of the sections and utilizes the Lidar dataset to generate solar radiation maps. Approximately 0.5 million cross-sections are generated with detailed information regarding the width and placement of the street elements. The details of the cross-sections are further processed to find generic street compositions, understand the influence of shadows on walkways and bikepaths, and calculate the enclosure.

Predicting the work function of 2D MXenes using machine-learning methods

MXenes, which are graphene-like two-dimensional transition metal carbides and nitrides, have tunable compositions and exhibit rich surface chemistry. This compositional flexibility has resulted in exquisitely tunable electronic, optical, and mechanical properties leading to the applications of MXenes in catalysis, electronics, and energy storage. The work function of MXenes is an important fundamental property that dictates the suitability of MXenes for these applications. We present a series of machine learning models to predict the work function of MXenes having generic compositions and containing surfaces terminated by O*, OH*, F*, and bare metal atoms. Our model uses the basic chemical properties of the elements constituting the MXene as features, and is trained on 275 data points from the Computational 2D Materials Database. Using 15 different features of the MXene as inputs, the neural network model predicts the work function of MXenes with a mean absolute error of 0.12 eV on the training data and 0.25 eV on the testing data. Our feature importance analysis indicates that properties of atoms terminating the MXene surface like their electronegativity, most strongly influence the work function. This sensitivity of the work function to the surface termination is also elucidated through experimental measurements on Ti3C2. We introduce reduced-order models comprising of ten-, eight-, and five-features to predict the work function. These reduced-order models exhibit easier transferability to new materials, while exhibiting a marginal increased mean average error. We demonstrate the transferability of these reduced order models to new materials, by predicting the work function of MXenes having surface terminations beyond the original training set, like Br*, Cl*, S*, N*, and NH*. Predicting electronic properties like the work function from the basic chemical properties of elements, paves the way towards rapidly identifying tailored MXenes having a targeted range of properties that are required for a specific application.

Composition and Diversity of Algal Flora in Jahanara Imam-Pritilota Hall Sorobar (JP) Lake of Jahangirnagar University Campus, Savar, Dhaka, Bangladesh

The study aimed to evaluate the composition and diversity of algae in the JP Lake of Jahangirnagar University campus. The research was carried out between the period of December 2021 to November 2022. A total of 72 water samples were used to carry out the investigation. Shannon and Simpson diversity indexes were used to determine the level of diversity. 234 phytoplankton species under 98 genera were found belonging to 8 classes (Cyanophyceae, Chlorophyceae, Bacillariophyceae, Synurophyceae, Euglenophyceae, Cryptophyceae, Dinophyceae, and Xanthophyceae). According to the generic percentage composition, Chlorophyceae comprised 46%, followed by Bacillariophyceae (20%) and Cyanophyceae (18%). At the species level, Euglenophyceae were found to dominate (34%) the studied sites that were followed by Chlorophyceae (31%) and Cyanophyceae (18%). The total density of phytoplankton was 387.34×105 ind/l. The highest phytoplankton density was found in April, and the lowest one was in November. Cell dispersion was below average in May for Cyanophyceae, Bacillariophyceae, Cryptophyceae, and Synurophyceae. Oscillatoria, Monoraphidium, Actinastrum, Cosmarium, Trachelomonas, and Euglena dominated the surveyed region. The Shannon Diversity Index showed a value of 1.51, while Simpson's Diversity Index showed a value of 0.28. The overall variation (80.73%) among the classes was represented by PCA cells. According to the Shannon and Simpson Diversity Indexes, the diversity was low.

Taxonomical Diversity of Cenomanian-Turonian Dinocyst in the Northern Hemisphere: Some Aspects of Paleobiogeography and Paleoclimatology

Taxonomic typification of dinocyst assemblages was carried out on the basis of a qualitative and quantitative assessment of their generic composition for the Northern Hemisphere in the Cenomanian-Turonian time in order to identify correlation taxa. Three types of dinocyst assemblages were identified in the Cenomanian. Cenomanian dinocyst assemblages are poorly differentiated; a large number of cosmopolitan genera was identified, which is in good agreement with paleobotanical data on a very warm, humid climate. Three types of dinocyst assemblages were established for the Turonian age. The number of cosmopolitan genera of dinocysts decreases, and species endemism sharply increases in individual Turonian basins. The differentiation of assemblages increases and their correlation potential decreases. However, the identified common genera and species of dinocysts in different types of assemblages provide the possibility of interregional correlation of Upper Cretaceous deposits at the stage, substage, and, at some sections, even more detailed levels in different climatic zones.

New and little known taxa of the order Orthoptera (Insecta) from the Upper Triassic and Lower Jurassic of England

New material of Orthoptera from the Upper Triassic and Lower Jurassic of England is considered. Some problems with generic composition and diagnostics of the subfamily Protogryllinae (Protogryllidae) from the suborder Ensifera and of the subfamily Locustopsinae (Locustopsidae) from the suborder Caelifera are discussed. One new genus and two new species are described: Daniilacheta aristovi gen. et sp. nov. (Protogryllinae) and Plesioschwinzia sharovi sp. nov. (Locustopsinae). Some additional species, previously attributed to Locustopsis Handlirsch, are tentatively included in Plesioschwinzia Zessin. New specimens, possibly belonging to Locustopsis spectabilis Zeuner, are briefly described and illustrated.

Deterministic versus stochastic control in β-diversity, abundance and co-occurrence patterns of a soil nematode assemblage living in a Mediterranean soil

In this paper we studied the determinism-stochasticity trade-off affecting the structure of a soil nematode assemblage. Specifically, in a field experiment that lasted six months, the soil temperature and moisture conditions were manipulated in 14 plots. The generic composition of the soil nematode assemblage was explored by estimations of β-diversity, its turnover and nestedness components and by fitting rank abundance models. Further the associative aspects between the assemblage members and between them and habitat attributes were accounted for by analyzing the niche overlap based on Pearson correlation coefficients. Using variation partitioning and null models, we found that the generic diversity of the assemblage was more strongly determined by non-registered lateral experimental factors (stochastic control). By contrast, the deterministic control—less strong than the stochastic counterpart—was exerted both in synchronization with the changes in habitat characteristics and/or with a time delay. The network analysis showed that, under favorable habitat conditions in July, September and October, reduced network modularity and enhanced connectivity were favored, which probably led to a niche-based deterministic selection that outperformed stochasticity. Conversely, under changing experimental conditions in August and lower temperature in November and December, stochasticity would be superior to niche identity, leading to enhanced modularity and relatively loose networks.

Revision of Permosialidae (Insecta: Palaeomanteida) from Uppermost Lower and Lower Middle Permian of European Russia

Generic and species composition of Permosialidae (Insecta: Palaeomanteida) from the uppermost Lower and lower Middle Permian of European Russia is discussed. Permosialis defurcata Martynova, 1952, P. brevifurcata Martynova, 1952, P. bifasciata Martynov, 1933, P. cauleoides Martynova, 1952, P. marmorata Martynova, 1952, P. immaculata Martynova, 1952 and P. fasciata Martynova, 1952 (all from the Lower Kazanian deposits of Soyana in Arkhangelsk Region) are synonymized under P. paucinervis Martynov, 1928 from the coeval deposits of Tikhie Gory in Tatarstan. Permosialis quadriramosa Martynova, 1952 from Soyana is synonymized under Palaeomantopsis furcatella Martynov, 1928 from Tikhie Gory. Palaeomantopsis furcatella, Permosialis paucinervis, P. perfecta Martynova, 1952, and P. latiformis Martynova, 1952 (the latter two from Soyana) are redescribed. Permosialis vizzya sp. nov. from Upper Kungurian of Vorgashor coal field and P. martynovae sp. nov. from Soyana are described as new.

Free-living marine nematode communities in Rhizophora mucronata Lam. (Rhizophoraceae) forest at Mida Creek, Kenya

Nematodes are among the most abundant organisms in marine ecosystems where they play a critical role in nutrient cycling, provision of nourishment to the higher organisms in the food web, pest control, and act as disease-causing vectors. This study determined the abundance and community structure of nematodes in three plots of Rhizophora mucronata forest stand at Kirepwe Macho and Dabaso sites at Mida Creek, Kenya. Replicated sediment samples were randomly collected from one forest plot in Kirepwe Macho and two plots in Dabaso during the months of January and April 2011. Total organic matter, sand and silt proportions were not significantly different across the study sites and between January and April. A total of 90 and 81 nematode genera were encountered in the month of January and April, respectively. At both sampling times, the nematode community was dominated by Terschellingia (20.5 % - 15.3 %) and Paracomesoma (10.6 % - 6.6 %). The Shannon-Weiner diversity index was relatively high in the three forest plots both in January and April ranging from 2.76 to 3.40. There was no significant difference in nematode community assemblage within sites (p > 0.05, 0.901) but there were differences between sampling time (p > 0.05, 0.001). The results showed that the three sites had similar nematode community structure suggesting that the three Rhizophora mucronata mangrove forest plots did not differ in terms of nematode generic composition even though the plots were not all close to each other.

Upper Devonian environments and ostracods biofacies of the Kuznetsk Basin

The volcanogenic-carbonate-terrigenous Upper Devonian complex of deposits of the margin of the Kuznetsk Basin has been studied. The results of the studying of sedimentological processes, the composition of sedimentary rocks, the specifics of the petrographic composition of impurity pyroclastic material, make it possible to reconstruct the sedimentation conditions here in the Late Devonian. The predominance as an impurity and sometimes as the main component in sedimentary rocks of andesitic fine pyroclastics with a lower value of acidic and basic volcanic components has been established. From the Late Givetian — Early Frasnian to Famenmian, an uneven increase in the content of acid pyroclastics occurs in the rocks. The studied sections relate to the vast shelf and continental slope of the Siberian paleocontinent. The western direction of the paleoslope is determined. The studied sediments belong to the slope and basin type, they are represented by fine-grained tephroid and volcanomictic sandstones, fine-detrite limestones, olistostromes and slope landslide breccias, turbidites and rarer turbidite canalites, peculiar “conglomerate limestones” (paleoseismites). The composition of pyroclastics and volcanoclastics in sedimentary rocks indicates the manifestation of andesitic volcanism synchronously with sedimentation and the existence of paleogeodynamic conditions corresponding to the active continental margin possibly of the Andean type in the Late Devonian in the studied area. Based on the data obtained as a result of quantitative calculation of the generic composition of the ostracod associations from the studied sections of the Middle (upper part) and Upper Devonian within three structural-facies subdistricts of the margin of the Kuznetsk Basin, the analysis of ostracods was carried out. The features of the biofacial distribution of ostracods allowed us to identify 10 associations and establish their matching with certain parts of the basin from the Late Givetian to the Late Famennian time. The influence of volcanism on the composition of ostracod associations is traced, the appearance of pyroclastics in rocks reduces the taxonomic diversity of ostracod associations and quantitative composition. Variations in the taxonomic composition of ostracod associations correlate well with trends in T-R cycles, the genus is Bairdia is dominant during transgression.

Colloidal Stability of Bitumens Related to their Generic Composition

Three bitumens obtained from crude oils widely differing in chemical nature were analyzed for generic composition. Separation into group components was carried out by liquid chromatography, using a new procedure. With this method, five fractions were separated, i.e. saturates, cyclics, light resins, heavy resins and asphaltenes. The size distribution of the asphaltene particles in the bitumens and the Heithaus parameters characterizing the colloidal stability of bitumen were determined. The results suggest that the role of the light resins in bitumen differs from that of the heavy resins, as they are constituents of the dispersing and dispersed phase, respectively. The cyclic components and light resins form the dispersing medium of bitumen while the heavy resins and asphaltenes constitute the dispersed material. Saturates are the bitumen components that deteriorate the peptization of asphaltene particles.

Comparative assessment of the intestinal microbiota, lipid metabolism and morphological changes of the liver in experimental models of metabolic syndrome

Metabolic syndrome (MS) is a widespread polyethiological clustering characterized by metabolic, hormonal disorders and clinical manifestations that significantly increase the risk of developing cardiovascular diseases, atherosclerosis, type II diabetes and other pathological conditions. An important role in the development of MS is assigned to the intestinal microbiota. To develop new therapeutic agents for correction of MS manifestations, it is necessary to develop adequate experimental models. In this paper, comparative studies were conducted to assess the parameters of lipid metabolism, the content of peptide hormones, morphological changes in liver tissue, and the quantitative and generic composition of the intestinal microbiota of mice. Experimental models of experimental hyperlipidemia (HL) caused by the introduction of poloxamer 407 (Pol407) and alimentary MS (a diet with fructose and the addition of cholesterol to the feed) were used. Significant increase in the levels of cholesterol, triglycerides, and low-density lipoprotein (LDL) was found in the group of mice treated with Pol407 injections. To assess the indicators of carbohydrate metabolism in blood serum, the following markers were determined: insulin, adiponectin, leptin. In the alimentary MS model a decrease in adiponectin in the blood serum, while insulin level was increased. In both experimental models, significant changes in the gut microbiota of mice were observed. They were associated with the manifestation of metabolic dysbiosis - an increase in the representation of Firmicutes (staphylococci, streptococci, enterococci) in the biomaterial, changes among representatives of both facultative (E. coli), and transient (Enterobacter bacteria) microflora. In addition, dystrophic, as well as morphological changes and signs of inflammation in the liver tissue were noted in both groups.

Evaluating the potential implications of canadian front-of-pack labelling regulations in generic and branded food composition databases

BackgroundCanada proposed the implementation of mandatory front-of-pack (FOP) labelling regulations, whereby foods meeting or exceeding thresholds for nutrients-of-concern (i.e., total sugars, saturated fat, sodium) must display a ‘high-in’ FOP symbol (FOP). The objective of the study was to evaluate the potential implications of the proposed regulations using Canadian generic and branded food composition databases.MethodsA generic food composition database of products consumed by Canadians, Canadian Nutrient File (CNF) 2015 (n = 3,677), and a branded food composition database of packaged foods and beverages, Food Label Information Program (FLIP) 2017 (n = 17,521), were used to evaluate the number and proportion of foods that would display a FOP symbol based on the details of the proposed FOP labelling regulations published in 2018.ResultsOverall, 35.5% (n = 1,306) of products in CNF 2015 and 63.9% (n = 11,193) of products in FLIP 2017 would display a FOP symbol for at least one nutrient-of-concern exceeding proposed thresholds. Soups, Combination Dishes, and Desserts categories in CNF 2015 and Combination dishes, Soups, and Meats categories in FLIP 2017 would have the highest proportion of products that would display a FOP symbol. Although displaying a FOP symbol for one nutrient was most common in both CNF 2015 (n = 992; 27.0%) and FLIP 2017 (n = 7,296, 41.6%), the number (i.e., 0–3) and type (i.e., saturated fat, sodium, total sugar) of nutrients displayed varied by food category.ConclusionWhile the generic database, containing both packaged and unpackaged foods, revealed a low prevalence of foods that would display a FOP symbol, the branded database showed that the proposed FOP labelling regulations would identify over 60% of packaged foods with excess contents of nutrients-of-concern. Considering the high prevalence of packaged foods in Canada that would meet or exceed the thresholds of nutrients-of-concern, the proposed FOP labelling regulations should be implemented in a timely manner to help consumers easily identify foods high in nutrients-of-concern and encourage manufacturer-driven product reformulations.

FORMATION OF WEEDINESS OF THE WINTER WHEAT DEPENDING ON THE FERTILIZER SYSTEM UNDER THE EXPERIENCE FIELD OF VNAU

The article reflects the results of studying the features of the formation of the level of weediness of winter wheat agrocenosis with gradually increasing rates of nitrogen nutrition against the background of the recommended rates of phosphorus and potassium fertilizers. A literature review of scientific sources on the impact of the level of mineral nutrition on the formation of segetal vegetation in winter wheat is carried out. The species and generic composition of weeds was determined taking into account various fertilizer options in quantitative and percentage values, on the basis of which a generalization with respect to the specifics of additional mineral nutrition from the standpoint of influencing the growth in the number of the most dominant species and genera of weeds was made. The effect of fertilizers on the indicators of quantitatively weighted weediness, which ultimately made it possible to formulate a useful interval for reducing the level of weediness by a certain interval for increasing the fertilizer rate is estimated. Based on the conducted studies, the specifics of the effect of fertilizers on ensuring the corresponding levels of competitive stress between winter wheat plants and weed plants are formulated. The nature of the species distribution of agrophytocenoses of winter wheat and weeds in the context of individual species by biological characteristics is determined. Fertilizer rate of 60 kg/ha d.r. in the conditions of our research, the Podolyanka variety can be marked as a landmark in the system of ensuring a sufficient level of cenotic tension, which determines the subsequent reduction of the weediness indicator with an increase in the rate of nitrogen mineral nutrition. Prospects for further research on the effect of mineral fertilizers on the options for modern fractional application to the main critical periods of winter wheat on the formation of weed levels against this background are outlined.

Power Flow Optimization for a Hybrid-Electric Propulsion System

Abstract This study deals with the optimization of performance for a hybrid-electric propulsion system. It focuses on the modeling and power management frameworks, while evaluation is done on a single flight basis. The main objective is to extract the maximum out of the novel powertrain archetype. Two hybridization factors are considered. The pair helps to describe the degree of hybridization at the power supply and power consumption levels. Their revised mathematical definition facilitates a unique method of hybrid-electric propulsion system modeling that maximizes the conveyed amount of information. An in-house computational tool is developed. It employs a genetic algorithm optimizer in the interest of managing power usage during flight. Energy consumption is set as the objective function. The operation of a 19-seater, commuter aircraft is investigated. Turbo-electric, series-hybrid, parallel-hybrid, and series-parallel variants are derived from a generic composition. An analysis on their optimized performance, with different technological readiness levels for 2020 and 2035, is aimed at identifying where each system performs best. Considering 2020 technology, it does not yield a viable hybrid-electric configuration, without suffering significant payload penalties. Architectures relying on mechanical propulsors show promise of 15% reduction to energy consumption, accounting for 2035 readiness levels. The concepts of Boundary Layer Ingestion and Distributed Propulsion display the potential to boost electrified propulsion. The series-hybrid and series-parallel configurations are the primary beneficiaries of these concepts, displaying up to 30% reduction in fuel and 20% reduction in energy consumption.

A critical revision of the powdery mildew fungi (Erysiphaceae, Ascomycota) of Ukraine: Arthrocladiella and Blumeria

The previously compiled list of species of powdery mildew fungi of Ukraine was published more than 30 years ago. That list included 108 species belonging to 12 genera. However, over the past three decades, numerous changes have been made in the system of the former order Erysiphales, in particular, in its generic composition; moreover, dozens of new species have been described. At the same time, many species of powdery mildew fungi were introduced to Europe, including Ukraine, in particular, from East Asia and North America. Thus, the species composition of powdery mildew fungi of Ukraine has undergone significant changes and requires a critical revision. Therefore, a series of relevant articles is planned to be published. This article, the first in the series, deals with the small genera Arthrocladiella and Blumeria. A list of species of these genera recorded in Ukraine (Arthrocladiella mougeotii, Blumeria avenae, B. bulbigera, B. dactylidis, B. graminicola, B. graminis, and B. hordei), their distribution by regions of Ukraine and a key for identification are provided. Arthrocladiella mougeotii was found to occur occasionally only in nine regions, mainly in the southern part of Ukraine, primarily in the forest-steppe and steppe zones and on the South Coast of Crimea. Blumeria avenae was recorded only in two regions, on the South Coast of Crimea and in Central Polissya and should be also considered rare in Ukraine. The remaining species were observed quite often and registered in 14–24 regions, while B. graminicola and B. graminis are regarded as the most common ones.

On the new classification of dermatophytes

According to the recent changes in the classification of the family Arthrodermataceae, it may already include 9 genera and 79 species. Dermatophytes associated with human and animal infections belong to the genera Trichophyton, Microsporum and Epidermophyton, whereas Arthroderma, Ctenomyces, Guarromyces, Lophophyton, Nannizzia and Paraphyton are mainly represented by geophilic species. Since morphological and physiological traits in fungi cannot provide reliable basis for classification, the modern system of dermatophytes was built on the basis of phylogenetic analysis of nucleotide sequences. The new dermatophyte classification employs the principle of one fungus, one name, according to which genetically similar perfect and imperfect forms belong to the same species.
 At the current state of genosystematics, the taxonomic identification of dermatophytes in most cases requires the use of molecular methods, in particular, DNA sequencing of the ITS region.
 In this review, we briefly outline the history of dermatophyte classification, summarize generic and species composition of the family and provide data on their ecology, accession numbers for reference sequences of ITS region, and references to major taxonomic publications.