Figure 1. Eucyclops sibiricus: female A-C and D (life coloration); male E-G. Researchers from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS), together with colleagues from Kazan Federal University, the Ust-Lensky Nature Reserve, and the Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, have described a new species of copepod crustaceans from the order Cyclopoida (Copepoda) – Eucyclops sibiricus Novikov, Sharafutdinova, Abramova, Mayor & Chertoprud, 2025. The species has a wide range in Central Siberia, including the Lena River Delta, the Putorana Plateau, the Anabar Plateau, and the Irkutsk Region. This is another find of a new species of freshwater Copepoda in the Arctic. The genus Eucyclops is one of the most diverse in the order Cyclopoida and has more than 100 species. Morphologically, the species of the genus are often very similar to each other. In this regard, when describing Eucyclops species, an integrative approach is relevant, combining the analysis of morphological aspects, the structure of DNA sequences and ecological features. The new species E. sibiricus is very similar in body and limb structure to its relative E. speratus (Lilljeborg, 1901). Initially, all finds of this species from Siberia were identified as E. speratus. However, a detailed analysis of mitochondrial and nuclear gene sequences was subsequently performed for E. sibiricus, which clearly confirmed its uniqueness as a new species. Attempts were then made to find differences between the two species. A wide range of methods was used to search for morphological differences. However, qualitative and quantitative macrocharacteristics, morphometry, and the pattern of pores on body segments did not make it possible to distinguish between the species. It turned out that accurate identification can only be made using microcharacteristics that had not previously been used to separate Cyclopoida species. Thus, differences were observed in the arrangement and number of hairs and spines on the limbs and caudal branches. These features are so subtle that without performing a molecular genetic analysis it was not obvious what the researchers were looking at: a new taxon for science or a form of a previously described species? The use of a variety of approaches to studying morphology did not provide any universal solution for dividing the Eucyclops species complexes. In this case, while the widely used methods were unsuccessful, a long search and counting of small elements made it possible to find differences between the species. Thus, E. sibiricus and E. speratus should be considered pseudocryptic - having only slight differences in visual characteristics, but clearly distinguishable in their DNA sequences. According to previously published drawings of crustaceans, it is E. sibiricus that is found in Japan and Korea. Probably, the distribution of E. speratus covers the European part, and E. sibiricus - the Asian part of the Palearctic, while in the territory of the East European Plain the ranges of the species overlap. The research was supported by the grant of the Russian Science Foundation No. 23-24-00054. The work was published in the journal: Novikov A., Sharafutdinova D., Abramova E., Mayor T., Chertoprud E. 2025. An integrative approach to the delimitation of pseudocryptic species in the Eucyclops speratus complex (Copepoda, Cyclopoida) with a description of a new species expand // ZooKeys. V. 1226. P. 217-260.

Five organizations have signed an agreement to work together to protect and study the Chukchi-California gray whales. The move is aimed at combining efforts to conserve these unique marine mammals and developing a unified data exchange system that will improve coordination between researchers and increase the efficiency of their work. The agreement was signed by the Wrangel Island State Nature Reserve, Kronotsky Nature Reserve, Beringia National Park, ANO Chukotka Arctic Research Center, and the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS). The main goal of the partnership is to create a common platform for exchanging information, which will help avoid discrepancies in data and improve understanding of the migrations, behavior, and threats faced by gray whales. One of the key research methods will be photo identification, which will allow tracking the movements and migrations of whales. The project will be spearheaded by leading specialists, including Tatyana Pridorozhnaya (Wrangel Island Nature Reserve), Evgenia Volkova (Kronotsky Nature Reserve), and Matvey Mamaev (IEE RAS). Previous studies have already shown that gray whales living near Sakhalin sometimes stay off the coast of Kamchatka. Comparing photographs from different parts of the habitat will help scientists obtain new data on the behavior and migrations of these animals. The agreement will pay special attention to food security for the indigenous peoples of Chukotka, for whom whales have been an important source of food for thousands of years. Scientists also plan to study the impact of pathogens, heavy metals and other pollutants on the animals. The new agreement thus opens up unique opportunities for large-scale research and protection of gray whales. Photos: IEE RAS

The Flint Eurasian Crane Working Group Newsletter is an annual publication that publishes information on the current state of crane populations and their habitats, scientific research and international cooperation in the field of crane study and conservation, limiting factors, interesting facts, conferences and meetings. You can download the issue by following the link.

The new issue of the journal "Problems of Ichthyology" is available for reading and downloading (Vol. 64, No. 6, 2024). Contents Species diversity, diagnostic features and distribution of tubenosed gobies of the genus Proterorhinus (Gobiidae). I. A new species of goby from the water bodies of the eastern coast of the Black SeaE. D. Vasilyeva Morphological variability of Far Eastern redfins of the genus Pseudaspius (Leuciscidae)N. S. Romanov European barracuda Sphyraena sphyraena (Sphyraenidae) in the Black Sea: a comparative description of a new find and prospects for naturalization I. Yu. Tamoykin, D. N. Kutsyn, I. V. Vdodovich, P. I. Donchik Resident river lamprey Lampetra fluviatilis (Petromyzontidae) and its habitat conditions in the upper reaches of the tributaries of the Pola and Msta rivers A. V. Kolotey, A. V. Kucheryavy, A. O. Zvezdin, D. S. Pavlov Features of fish distribution according to the results of hydroacoustic studies in lake and river biotopes of the Bratsk Reservoir Yu. V. Gerasimov, E. S. Borisenko, D. D. Pavlov, I. V. Shlyapkin, A. I. Tsvetkov, D. S. Pavlov Spatial organization of the spawning grounds of the masked greenling Hexagrammos octogrammus (Hexagrammidae) in the northern part of the Sea of ​​Okhotsk Yu. A. Zuev, S. M. Rusyaev, D. V. Gusev State of the gonads of yearlings of the brown trout Salmo trutta (Salmonidae) of the Alatsoya River (Karelia) A. G. Bush, V. V. Kostin, M. A. Ruchyov, D. S. Pavlov Early development of Monodactylus argenteus (Monodactylidae) identified using DNA barcoding from coastal waters of Central Vietnam A. M. Shadrin, A. V. Semenova, Nguyen Thi Hai Thanh Thermoselection in sympatric polypterids: Senegal bichir Polypterus senegalus and Endlicher P. endlicherii (Polypteridae) V. V. Zdanovich, V. V. Sataeva, A. O. Kasumyan Short messages On the capture of Istiophorus platypterus (Istiophoridae) sailfish off the western coast of Kunashir Island (Sea of ​​Okhotsk) in September 2023 Yu. N. Poltev, V. G. Samarsky Obituary In memory of Sergei Sergeevich Alekseev (16.06.1959—11.10.2024) A. S. Golubtsov, N. B. Korostelev, M. Yu. Pichugin, V. P. Samusenok The issue is available at the link

Hippoboscidae bloodsuckers have a large number of unique morphological and physiological adaptations, most of which are closely related to their ectoparasitic lifestyle. Abdominal morphology is of great importance in the life of Hippoboscidae flies. The larva develops in the abdomen, and females lay a prepupa. Changes in abdominal morphology affect the ability of the abdomen to stretch and, therefore, to bear larvae. Representatives of the genus Lipoptena Nitzsch, 1818 have been divided into several groups according to the morphological features of the species. The genus Lipoptena itself currently includes 29 species. Fig.2. Phylogenetic tree of the family Hippoboscidae. The species L. cervi and L. fortisetosa are representatives of the genus Lipoptena Nitzsch, 1818. The species L. depressa and L. mazamae are representatives of the new genus Lipoptenella Bequaert, 1942. Modern data on the morphology and molecular phylogeny of Hippoboscidae flies reveal some inconsistencies in the taxonomy of this genus. Based on the conducted analysis of the morphology and molecular analysis, researchers from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) proposed a new classification of the genus Lipoptena Nitzsch, 1818. The subgenus Lipoptenella Bequaert, 1942 was elevated to the rank of genus. “In the genus Lipoptena, the morphological groups “cervi” and “capreoli” were identified, which do not coincide in composition with the groups identified earlier. A key for the genera of the subfamily Lipopteninae and keys for all species from the genera Lipoptenella and Lipoptena were compiled,” said Alexandra Yatsuk, researcher at IEE RAS. The work was published in the journal: A.A. Yatsuk, T.A. Triseleva, A.V. Matyukhin, E.P. Nartshuk New data on classification of Hippoboscidae (Diptera): Genus Lipoptena Nitzsch, 1818, Euroasian Entomological Journal, 23(6):353-359

Fig. 1. Locations of raw (red dots) and cleaned (green dots) pelagic trawling data in the northwestern Pacific Ocean: Sea of ​​Okhotsk (1), Bering Sea (2), Pacific Ocean (3), Kamchatka (4), Commander Islands (5), Kuril Islands (6), Onekotan Island (7), Simushir Island (8), Urup Island (9), Iturup Island (10), Kunashir Island (11), Sakhalin Island (12), Hokkaido Island (13), Honshu Island (14), Kyushu Island (15), Koryak Coast (16), Karaginsky Bay (17), Kamchatsky Bay (18), Ozernoy Bay (19), Kronotsky Bay (20), Avachinsky Bay (21). The staff of the P.P. Shirshov Institute of Oceanology of the Russian Academy of Sciences and the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) analyzed long-term data on the catches of three species of predatory fish in the northwestern Pacific Ocean over the past 50 years. The analysis was based on the results of pelagic trawl surveys of the Pacific Branch of the All-Russian Research Institute of Fisheries and Oceanography (TINRO, Vladivostok), which included over 75 thousand stations from the sea surface to a depth of 3.5 km (Fig. 1). The aim of the study was to determine how the distribution boundaries and abundance of three species of predatory fish in this area changed over time. Fig. 2. North Pacific daggertooth Anotopterus nikparini (top, photo by A.M. Orlov), long-snouted lancetfish Alepisaurus ferox (center, photo by Gonzalo Mucientes Sandoval, uk.iNaturalist.org), Pacific pomfret Brama japonica (bottom, photo by Vanessa A. Roberts, iNaturalist.org). In pelagic marine ecosystems, predatory fish play an important role. As predators of the highest trophic level, on the one hand, they represent a link in the food chain along which energy and organic matter are transferred from lower to higher trophic levels. On the other hand, they consume large quantities of commercial invertebrate and fish species. In the northwestern Pacific Ocean, three species are most common among predatory fish: the long-snouted lancetfish Alepisaurus ferox, the North Pacific daggertooth Anotopterus nikparini, and the Pacific pomfret Brama japonica (Fig. 2). The first two species actively consume Pacific salmon, saury, and other pelagic fish, while the latter is a promising commercial target. Fig. 3. Catch sites (left) and relative abundance (specimens/km2, right) of three species of pelagic predatory fish. “The maximum northward expansion of the daggertooth, lancetfish and pomfret was recorded in summer, spring and autumn, respectively. The maximum northward expansion of all three species was typical for the 2000s. The maximum absolute catches of lancetfish were recorded in winter, while those of the daggertooth and pomfret were recorded in spring and summer, respectively. The maximum absolute catches of the daggertooth and pomfret were recorded in the 1980s, while those of the lancetfish occurred in the 1990s,” said A.M. Orlov, Doctor of Biological Sciences and employee of the Laboratory of Lower Vertebrate Behavior at the Institute of Ecology and Evolution of the Russian Academy of Sciences. The information obtained seems useful for preserving the biodiversity of the pelagic ecosystems of the North Pacific and the rational exploitation of the stocks of the studied species. In addition, the analysis allows us to link changes in their distribution with seasonal and longer-term climate dynamics. Seasonal changes in distribution fit well with the pattern of northward migrations as water temperatures increase and southward migrations as temperatures cool. Long-term shifts in distribution are likely due to global warming. “Maximum distribution of the daggertooth to the north, The results are published in the work: Orlov A.M., Volvenko I.V. 2025. Distribution and abundance of large pelagic predatory bony fishes in the northwestern Pacific over a half-century // Water Biology and Security. Article 100373.

Fig. 1. Map-scheme of the research area. 1 - Central Asian endorheic basin. 2 - Durgun reservoir. During ichthyological research within the framework of the Joint Russian-Mongolian Complex Biological Expedition of the Russian Academy of Sciences and the Academy of Sciences of Mongolia, ichthyologists were quite surprised by some strange habits of Mongolian fish, which is of course connected with the specific conditions of the reservoirs they inhabit in the semi-arid zone of the highlands with a sharply continental climate. Fig. 2. Durgun Reservoir. Basin of the Great Lakes, Western Mongolia (photo by Yu.Yu. Dgebuadze) In the reservoirs of the western part of the Central Asian endorheic basin of Mongolia, against the background of harsh climatic conditions, lakes and rivers have low biological productivity and low species diversity of fish. At the same time, one species, Potanin's Altai osman Oreoleuciscus potanini (Kessler, 1879) is an absolute dominant in terms of numbers and biomass. This species has four intraspecific forms: piscivorous, herbivorous, sharp-snouted and riverine, differing in morphology and ecology. What the ichthyologists found strange was not this way of solving the problem of biodiversity (the "bundles of forms" in fish are observed in many reservoirs of the globe with specific conditions and depleted ichthyofauna), but what the Altai osmans feed on. It turned out that the intestinal contents of the most numerous herbivorous form mainly (up to 80%) consists of charophytes. Considering that Chara thalli are encrusted with calcium carbonate, which makes up to 70% of the dry mass, it was unclear what organic matter O. potanini could assimilate from such food. Fig. 3. Durgun reservoir, dam section. Basin of large lakes, western Mongolia (photo by Yu.Yu. Dgebuadze). To solve this riddle, studies were conducted in the Durgun Reservoir (48° 19′ 33″ N, 92° 48′ 25″ E) of the Great Lakes Basin, located in the western part of the Central Asian endorheic basin (Fig. 1, 2, 3). According to net catches, the share of the herbivorous form in the reservoir was 75.1% of all forms of O. potanini (Fig. 4). Samples of fish muscle tissue were taken - O. potanini, a branch of Chara spp. from the reservoir (Fig. 5), pre-cleaned from phytoperiphyton (periphytic microalgae) and the phytoperiphyton itself, washed off the hara. Fig. 4. Herbivorous form of the Potanin’s Altai osman Oreoleuciscus potanini (Kessler, 1879) from the Durgun Reservoir (photo by B. Mendsaikhan). "To find out what exactly Potanin's Altai osman gets from consuming charophytes, we performed stable isotope analysis (SIA) and a more detailed analysis of biomarkers - fatty acids (FA). SIA showed that O. potanini received its main carbon from periphytic microalgae, and not from Chara spp. The FA analysis generally confirmed the SIA results. In particular, biomarker FA of diatoms were found in the biomass of O. potanini, while characteristic biomarkers of Chara spp. were absent," said Doctor of Biological Sciences, Academician of the Russian Academy of Sciences, Head of the Laboratory of Ecology of Aquatic Communities and Invasions Yu. Yu. Dgebuadze. Fig. 5. Charophytes from the Durgun Reservoir, which are swallowed by Potanin's Altai osmans. (Photo by D. Altansukh). Thus, the herbivorous form of O. potanini absorbed algae to assimilate periphytic microalgae during passage through the intestine. At the same time, the thalli of charophyte algae were not crushed by fish and left their bodies practically unchanged. The work was carried out by scientists from the A. N. Severtsov Institute of Ecology and Evolution Problems of the Russian Academy of Sciences, Moscow, the Institute of Biophysics of the Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, the Siberian Federal University, Krasnoyarsk, the Western Regional Branch of the National University of Mongolia, Khovd, Mongolia and the Institute of Geography and Geoecology of the Mongolian Academy of Sciences, Ulaanbaatar, Mongolia. The head of the Joint Russian-Mongolian Complex Biological Expedition of the Russian Academy of Sciences and the Academy of Sciences of Mongolia S. N. Bazha provided great assistance in conducting these studies. The article is published in open access: Dgebuadze, Y.Y., Sushchik, N.N., Altansukh, D. Mendsaikhan, B., Emelianova, A.Yu., Gladyshev, M.I. Ingested vs. digested: what do Potanin’s Altai Osmans (Cypriniformes, Leuciscidae) really eat? Environ Biol Fish (2025).

Fig. 1. External appearance of the Gilbert's rattail Coelorinchus gilberti (top) and its otoliths (bottom). Scientists from the A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS), the P.P. Shirshov Institute of Oceanology of the Russian Academy of Sciences and the Pacific Branch of the All-Russian Research Institute of Fisheries and Oceanography have obtained the first data on the spatial distribution, size composition, age, sex structure, growth and maturation of a poorly studied deep-sea benthopelagic fish species from the waters of the underwater Hawaiian-Emperor seamount chain (northwestern Pacific Ocean) – Coelorinchus gilberti. Coelorinchus gilberti (Fig. 1) is a member of the Macrouridae family found off the Pacific coast of Japan (from Shikoku to Hokkaido) and on the seamounts of the Kyushu-Palau and Hawaiian-Emperor seamount chain. This species is a fairly common bycatch in the domestic longline fishery for monkfish Erilepis zonifer (Anoplopomatidae) and groupers (Sebastidae) on the Hawaiian-Emperor seamount chain. However, until now, there has been no published information on its distribution and biology. Fig. 2. Scheme of the research area on the Emperor Ridge seamounts (left) and catches (CPUE – catch per unit effort in specimens per 1000 hooks per 1 hour of line standstill) of Gilbert's coelorinchus Coelorinchus gilberti by bottom longline (right). Catches of the species under consideration were recorded from the Nintoku Seamount in the north to the Kammu Seamount in the south (Fig. 2) at depths of 215-1840 m, which significantly expands the known bathymetric range of its occurrence. It was most often recorded on the Jingu, Ojin, and Kammu Seamounts. The catches included individuals with a total length of 34-93 cm (average 53.2 cm), body weight of 140-5240 g (average 688.2 g), and ages of 24-48 years (average 37.9 years). Females were significantly larger and older than males and generally dominated the catches (the proportion of males did not exceed 40%). Individuals in spawning condition were recorded in catches only in April, which is probably due to the end of spawning, which is assumed to occur in earlier months. The conservation status of many representatives of the genus Coelorinchus is assessed by the IUCN (International Union for Conservation of Nature) as Data Deficient or Least Concern. In this regard, many authors recognize the need for a more detailed study of the ecology and biology of representatives of this genus, monitoring of catches, regulation of fisheries, conservation and rational use of their stocks in order to prevent overfishing. In this regard, the obtained data are of undoubted value. The article was published in the journal: Korostelev, N.B., Volvenko, I.V., Maltsev, I.V., Orlov, A.M. 2025. Brought to the surface from obscurity: the distribution and biology of Coelorhinchus gilberti (Macrouridae, Gadiformes, Teleostei) off the Emperor Seamounts (Northwestern Pacific) // Deep Sea Research Part II: Topical Studies in Oceanography. Article 105461. Related materials: RAS: "Biologists have described deep-sea commercial fish living near the Hawaiian Islands" Scientific Russia: "Deep-sea fish living near the Hawaiian Islands have been described by biologists for the first time" RSF: "Biologists have described deep-sea commercial fish living near the Hawaiian Islands" AgroXXI: "Fertilizers from deep-sea fish should not harm the population of mysterious rattails"

Fig. 1. Morphology of the digestive tract of tadpoles of the family Dicroglossidae: A Fejervarya moodiei; B Hoplobatrachus rugulosus; С Occidozyga lima. A key feature of tailless amphibians (Amphibia: Anura) is their complex life cycle, in which the terrestrial adult form is separated from the aquatic larval stage by metamorphosis. The radical morphological changes that occur during catastrophic metamorphosis essentially "zero out" the larval morphology and "re-create" the adult organism with a different body plan. This enables independent evolution of the larval and adult stages, which exist in different environments and participate in different ecosystems, including food chains. It follows that, depending on the conditions of reproduction and development, externally and ecologically similar frogs can have very different tadpoles with different trophic specializations and adaptations. A good model for studying this phenomenon are frogs of the Dicroglossidae family, which is widespread in the Asian tropics. Researchers from the Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) studied seven species syntopically inhabiting the southern regions of Vietnam: Fejervarya limnocharis, F. moodiei, Hoplobatrachus rugulosus, Limnonectes dabanus, Occidozyga lima, O. martensii and Quasipaa verrucospinosa. These are outwardly quite similar frogs, similar in their near-water or almost aquatic lifestyle and differing mainly in size. A comprehensive study of the external and internal morphology (morphometric parameters, oral apparatus, digestive tract, visceral skeleton) of their tadpoles was conducted. Although adults feed in a similar way, tadpoles belong to different trophic guilds – generalized scrapers-filter feeders (Fejervarya limnocharis, F. moodiei, Limnonectes dabanus, Quasipaa verrucospinosa) or specialized predatory macrophages (Hoplobatrachus rugulosus, Occidozyga lima, O. martensii). Fig. 2. Cartilaginous skeleton of tadpoles of the family Dicroglossidae (top – chondrocranium; bottom – hyobranchium): A Fejervarya moodiei; B Hoplobatrachus rugulosus; C Occidozyga lima. The study showed for the first time that in addition to the features of the external morphology and structure of the oral apparatus (uniform generalized in scrapers and highly specialized in predators), the studied representatives of different guilds also differ significantly in the general morphology of the digestive tract. The most typical scraper tadpoles, common to many Anura groups, are characterized by a generalized spiral intestine of great length and the absence of a formed stomach (Fig. 1A). In contrast, predatory tadpoles are characterized by a shortened intestine, a reduced number of loops, and the presence of a more or less formed stomach (Fig. 1B,C). The first detailed study of the morphology of the larval skeleton of tadpoles – the skull (chondrocranium) and the hyoid-branchial apparatus (hyobranchia) – showed that with “predatory” specialization, the adaptive transformation of the skeleton can proceed in two different ways: by “robustization” of the generalized form (Fig. 2A, B), as in Hoplobatrachus rugulosus (Fig. 2C, D), without radical changes, and by strong modification and creation of a unique, extremely specialized morphology, as in tadpoles of the genus Occidozyga (Fig. 2E, F). "At the same time, if the generalized form of the skeleton and digestive tract is typical for omnivorous tadpoles, then in the predatory tadpole H. rugulosus these structures have only individual features associated with macrophagy, and the "predatory" specialization affects mainly the keratin oral apparatus; field observations and laboratory experiments show that the larvae of this species are rather omnivorous opportunists, and not obligate predators, as was previously thought. On the contrary, in tadpoles of the genus Occidozyga, the morphology is so specialized that they lose the ability to any type of nutrition, except for obligate predation, which includes a narrow range of prey," said Anna Vasilyeva, PhD, senior researcher at the IEE RAS. Thus, independent evolution of the larval stage in similar species of Dicroglossidae leads to the formation of completely different morphological forms of tadpoles, capable of mastering different food resources and occupying different niches within the same reservoir. In general, this example clearly shows how Anura achieves significantly greater ecomorphological diversity at the larval level than in adult forms. The study was carried out at the Joint Russian-Vietnamese Research and Technology Center. The study was supported by the Megagrant International Cooperation Program, project 075-15-2022-1134. Publication imprint: Vassilieva A.B., Trung Duc Nguyen, Sorokin P.A. (2025). Morphological diversity of tadpoles of fork-tongued frogs (Anura: Dicroglossidae) with different trophic specializations. Vertebrate Zoology, 75, 31-57. DOI 10.3897/vz.75.e139103

Blood-sucking flies of the genus Ornithomya Latreille, 1802 (Diptera: Hippoboscidae) inhabit mainly the middle latitudes of the Old World. They are parasites of birds, especially birds of prey. Some small non-predatory birds, which are unable to effectively clean their plumage and catch parasites in it, are also attractive hosts for these parasites. The fauna of the genus Ornithomya is quite extensive. It includes at least 31 species, 8 of which were found in Russia. Despite the constant interest of researchers in this group, the fauna of this genus in Russia remains insufficiently studied. Scientists from the Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) described a new species of the genus Ornithomya – O. nazarovi Yatsuk, Matyukhin et Nartshuk, sp. n. – from Simushir Island (Sakhalin Oblast, Russia). The new species differs from other species of the genus Ornithomya inhabiting Russia and Japan in the length of the head and thorax, the length of the wings, the number of bristles on the scutellum, the arrangement of microtrichia on the wings, and the coloration of the dorsal and ventral sides of the thorax. The work was published in the journal Proceedings of the Zoological Institute RAS: E.P. Nartshuk, A.V. Matyukhin, M.Yu. Markovets and A.A. Yatsuk Proceedings of the Zoological Institute RAS, 2024, 328(4): 640–657