Abstract The fauna of the insect order Blattinopsida in the Soyana and Tikhie Gory localities (Middle Permian of Russia) is discussed. Glaphyrophlebia iva sp. nov. from Soyana is described, G. subcostalis (Martynov, 1928) from Soyana and G. rossica (Martynov, 1930), nom. ressur. from Tikhie Gory are redescribed, and G. rossica is removed from synonymy with G. subcostalis.

Abstract A monographic description of representatives of the genus Parrelloides from the Upper Cretaceous of West Siberia (Campanian and Maastrichtian) has been performed. The established species of this genus, including two new ones, P. aquilonius and P. variabilis, are described. The stratigraphic range of the genus has been extended. The generic assignments of P. sibiricus (Neckaja) and P. proprius

Abstract The species Chama clavaticostata Klushnikov, 1958, which was originally described based on one juvenile exemplar from the Middle Eocene in the environs of the town of Krivoi Rog (Ukraine), is redescribed.

Abstract The composition of small vertebrate remains found in the Pleistocene deposits of the East Chamber of Denisova Cave indicates that throughout the history of sedimentation, biotopes in the vicinity of the cave remained highly mosaic. Woodlands alternated with areas covered by meadow and steppe vegetation. Climate fluctuations led to changes in the ratio of areas occupied by different natural

Abstract The validity and index species of the standard ammonite-based zones (from bottom to top: Rjasanensis, Spasskensis, and Tzikwinianus zones) of the Ryazanian Stage in the type region are discussed. The species Surites spasskensis (Nikitin, 1888) and S. tzikwinianus (Bogoslowsky, 1896) are re-examined and re-described. It has been established that these two phylogenetically successive species

Abstract— Permian marine bivalves of the Pronchishchev Ridge (North Siberia) were systematically studied for the first time.. The presence of the Middle and Upper Permian with five biostratigraphic levels was established based on fossil findings. In the Middle Permian, these are the bivalve Kolymia inoceramiformis–K. plicata (undivided) and Kolymia multiformis zones, and in the Upper Permian—the Maitaia

Abstract A fossil cockroach, Periplaneta (?) perialla sp. nov., is described based on a larva from Rovno amber. This species is provisionally assigned to the genus Periplaneta. This is the first representative of the subfamily Blattinae, provisionally assigned to the modern genus Periplaneta, from the Eocene of Ukraine, and the first find of an amber insect from the Manevychi locality, Volyn Region

Abstract This paper describes the microanatomical and histological structure of different-sized femora and hypocentra of the archegosauroid amphibian Platyoposaurus stuckenbergi from the Middle Permian (Urzhum horizon, Estemmenosuchus uralensis zone) of Eastern Europe. Age variability is discussed in a comparative context, along with the ecology of the species. P. stuckenbergi femora are characterized

Abstract A new species, Phoebodus curvatus from the Middle and Upper Devonian of the Middle and South Urals is described. The teeth of the new species differ from the teeth of other Phoebodus species in the very long lateral cusps curved lingually, and narrow labio-basal projection protruding beyond the labial edge. The distribution of all known Phoebodus species is analyzed. The ranges of five previously

Abstract Remains of the stem anseriforms Presbyornithidae dominate among the avian material from the Tsagaan-Khushu locality in southern Mongolia (Naran-Bulak Formation; upper Paleocene–lower Eocene). Revision of the materials previously attributed to Presbyornis showed that they actually belong to two taxa of Presbyornithidae plus one or two taxa of stem Phoenicopterimorphae. The relatively large

Abstract Studies of fossil bacteria show that mineral formation affected by or involving bacteria has occurred everywhere on Earth since the emergence of bacteria. Homogeneity of rocks and rock formations in the Precambrian and Devonian indicate that similar conditions in the Archean, Proterozoic, and Devonian, during the formation of the rocks studied.

Abstract An analysis of the morphological features of the radiolarian skeletons of the class Stauraxonaria from the Late Carboniferous and Early Permian of the South Urals of Russia and the Western Mugodzhary of Kazakhstan, as well as the Middle Permian of Western Texas in the United States made it possible to reinstate the genus Nazarovispongus Kozur, 1980 and revise the systematic position of the

Abstract A new genus, Progadilinoides, with the type species P. balakovensis sp. nov. is described from the lower Aptian of the Volga Region and determined as a representative of the family Pulsellidae. The genus Progadilina Palmer, 1974 has been transferred to the same family.

Abstract The surface of the primary shell layer of Septaliphoria excitata (Smirnova, 1978) bears rhombic imprints of the epithelial cells that secrete the periostracum. The primary layer is pierced with micropores. The bundles of fibers of the secondary layer are directed at various angles, up to a right angle to the neighboring bundles.

Abstract An unusually large anaptychus is described from the lower part of the Upper Djangura Subformation (Upper Bajocian Garantiana baculata Subzone of the Strenoceras niortense Zone) on the Kyafar River (Karachay-Cherkessia, Northern Caucasus). Judging by the shape and size, it belonged to a representative of Lytoceras (Thysanolytoceras) (family Lytoceratidae). The wings of the anaptychus are partially

Abstract The family Tococladidae is transferred to the order Eoblattida. The family consists of three Permian genera: Tococladus Carpenter, 1966 from USA, France and Russia, Tshekardocladus Rasnitsyn et Aristov, 2015 from Russia and Elmocladus gen. nov. (type species Opistocladus strictus Carpenter, 1976) from the Lower Permian of USA. Opistocladus kargalensis Rasnitsyn et Aristov, 2013 from the middle

Abstract A new tribe, Palaeoanoplini trib. nov., with a new genus, Palaeoanoplus gen. nov., and a new species, P. horridus sp. nov., of the subfamily Curculioninae are described from the Late Eocene Baltic amber. The new tribe is close to the Recent tribe, Anoplini; however, it differs from Anoplini by its tibia without uncus, as well as by tarsal claws present, without teeth, prosternum with postocular

Abstract A new genus and species of malachite beetles (Coleoptera, Dasytidae), Protomauroania chaetophorata Tshernyshev, gen. et sp. nov. are described from Late Eocene Baltic amber. The beetle belongs to subfamily Danaceinae, and is similar to the genus Mauroania Majer, 1997 due to the scalloped lateral side of pronotum, but differs in the following characters: antennae with 6-segmented club, surface

Abstract The main directions and results of the Paleontological Institute’s activities over the past 40 years are considered. The demand for paleontological research conducted by the Institute’s scientists has shifted from stratigraphy and geological surveying towards the study of the evolution of the biosphere and evolutionary developmental biology. It is shown that the rapidly developing biological

Abstract A new morphotype of the ray-finned fish scales of the order Eurynotoidiformes (Actinopterygii) is reported from the upper Permian of Eastern Europe and assigned to the species Isadia arefievi A. Minich, 2015, which was initially described based on isolated teeth. Scales of the new morphotype are found in five localities of the Upper Vyatkian Substage, including the uppermost Permian beds of

Abstract The species Xeris dorbnikensis Manukyan sp. n. (Hymenoptera, Siricidae) has been described from the Eocene of Baltic amber. Previously, the family Siricidae was known from this locality only from the find of one species Eoxeris klebsi (Brues, 1926). The data on another siricid species of the genus Xeris are given without specifying the species rank. The faunistic links between the communities

Abstract The dispersed palynomorph Pseudoschizaea sp. of unknown affinity from the Jurassic of Italy was studied under transmitted light, confocal, fluorescent, scanning, and transmission electron microscopy. A comparison with spores of mosses and fungi, algal cysts and resting eggs of worms has been conducted. Similar sculpture pattern and size range are observed in some algae and fungi. A cross striation

Abstract Trogoderma ainu sp. nov. (Dermestidae; Megatominae) is described from the middle Eocene Sakhalinian amber. It is the first dermestid known from the Eocene of Asia and the second Trogoderma species from amber. The genus Trogoderma is known in fossil resins only in the preimaginal state. Fossil dermestid records are listed.

Abstract The study of the holotype of Striatolamia tchelkarnurensis Glickman, 1964 (Lamniformes: Odontaspididae), presumed to be an invalid species, in the Collection of the State Darwin Museum, described from the Chegan Formation of South Turgay (West Kazakhstan) and including more than 30 isolated teeth from one individual, showed that the species is valid. Morphological characters of the teeth of

Abstract This paper reviews and describes the Miocene ochotonids Alloptox gobiensis (Young) and A. gudrunae sp. nov. from the localities of the Valley of Lakes in Central Asia. The new species is of Early Miocene age, it differs from all known taxa of the genus Alloptox in its primitive structure of the p3 and in its smaller size. This new form complements our knowledge of the composition of the genus

Abstract Two new fossil damselfly species of the family Kennedyidae: Kennedya kedrovkensis sp. nov. and Progoneura kemerovensis sp. nov. are described from the presumed Lower Triassic beds of the Permian-Triassic locality Babiy Kamen’. The new species clearly differ from previously known species of Kennedya and Progoneura based on the main characters of the wing venation.

Abstract A new genus Zherikhiniellus gen. nov. (type species Zh. rarus sp. nov.) and two new species, Toxorhynchus michalskii sp. nov. (Apioninae, Apionini) and Zherikhiniellus rarus sp. nov. (Nanophyinae, Nanophyini), are described from Late Eocene Baltic amber. This is the second record of the subfamily Nanophyinae in Baltic amber, and the first record of the genus Toxorhynchus in the Eocene of Europe

Abstract New representatives of the order Eoblattida, Anakitala intermittens gen. et sp. nov. (Mesorthopteridae) from the Anakit-1 locality (Vyatkian of Krasnoyarsk Region) and Baharellinus elegans sp. nov. (Blattogryllidae) from the Novoaleksandrovka locality (Severodvinian of the Orenburg Region), are described from the Upper Permian of Russia.

Abstract Parthenina modesta (Sorgenfrei, 1958) is described from the Tarkhanian of the Eastern Paratethys. The species was previously known only from the Miocene of the North Sea.

Abstract An ulna fragment of a pterosaur Pteranodontidae indet. is described from the locality Polunino 2 in Volgograd Oblast (Late Cretaceous, Campanian). This is the first record of Pteranodontidae in Lower Volga Region, which supports a wide distribution of this group in the Late Cretaceous of Eurasia.

Abstract The Orgueil meteorite was studied using a TESCAN VEGA 3 scanning electron microscope. As a result, new microfossils were found, including a fragment of a pennate diatom shell, tubular structures with double porous cell walls (prasinophytes?), hollow spheres with a process (acritarchs?), and spore-like structures. The problem of the cometary origin of the Orgueil meteorite is discussed.

Abstract The hybocrinid crinoid Trecrinus schmidti gen. et sp. nov. is described from the Middle Ordovician (Uhaku Regional Stage, Darriwilian) of the lower reaches of the Volkhov River. Three long arms in the A, D and C radii, and a low cup with a flattened base without a stem are the main characteristics of the new genus. Morphology of the new genus emphasizes the similarities and differences in

Abstract Ten Middle Miocene imprints of Oecophylla Smith, 1860 (Stavropol Region, Russia) are described and redescribed from the collection of the Arthropoda Laboratory of the Borissiak Paleontological Institute of the Russian Academy of Sciences. Oecophylla has distinctive features of the wing venation, allowing the identification of fossils. Based on our study of extant ants, a procedure for identifying

Abstract Ammonites of subfamily Leptosphinctinae, ancestral to Perisphinctoidea, are revised based on the study of new collections from the lower part of the Upper Djangura Subformation (beds with Orthogarantiana humilis of the Upper Bajocian Strenoceras niortense zone) at the village of Krasnogorskaya on the Kuban River (Russia, Karachay-Cherkessia). The macroconchs of Leptosphinctes (Leptosphinctes)

Abstract A new genus and species of soft-winged flower beetles (Coleoptera, Malachiidae), Aliattalus intercalaris gen. et sp. nov., are described in the Late Eocene Baltic amber. The new genus is assigned to the tribe Palpattalini because the male possesses specific structures: an elongated, ventrally curved, domed pygidium with an elongated and bilaciniate apical sternite is combined with large palps

Abstract Fungus spores resembling teliospores of the genus Nyssopsora (Pucciniales) were found in a sample of Sakhalinian amber. Morphological features of the spores in the examined amber sample in general correspond to description of teliospores of the extant species Nyssopsora trevesiae parasitizing host plants of the Araliaceae, Trevesia sundaica in Java and Sumatra and Brassaiopsis ciliata in Southern

Abstract Callovian ostracodes (Calloviense, Jason, Coronatum, and Athleta zones) of Central Dagestan are identified and studied for the first time. The ostracode assemblage includes 9 species, one new species Pleurocythere khapissovi sp. nov. is described. Images of the previously known species are given.

Abstract The main trends in the morphological evolution of bryozoans at the Devonian-Carboniferous boundary were established when studying the Late Devonian–Early Mississippian bryozoans of Eurasia. The diversity of vertical colonies increased from Early Famennian to Late Tournaisian. An increase in their strength occurred by growth of the exozonal skeleton due to the growth of vesicular tissue in

Abstract A study of the history of consortial relationships between plants and fungi facilitates our understanding of the patterns and processes associated with evolutionary history of the members of these two kingdoms, their ecosystem function, and the formation of existing biodiversity. This paper is a review of recent paleomycological research focusing on the analysis of its main directions, objectives

Abstract Three new species of bivalves of the family Cardiidae are described from the Paleogene of Ukraine: Freneixicardia picturata (Upper Eocene, town of Dnepr), Loxocardium marmoreum (Middle Eocene, the town of Kanev), and Schedocardia imperfecta (Middle Eocene, town of Ingulets). The species Loxocardium denticostatum (Berezovsky, 1998) is redescribed, because its first description was based on

Abstract Paratractocerus gusakovi gen. et sp. nov. is described from Baltic amber. It is similar to species of Atractocerus Palisot de Beauvois, 1801 s.l. but differs in the relatively long elytra reaching the hind trochanters, absence of the maxillary palp organ and less modified antennae.

Abstract Ammonoid collections assembled in recent years from the Upper Asselian-Lower Sakmarian limestones of the Sterlitamak Shakh-Tau shikhan enabled a detailed study of this small but very interesting assemblage. Currently, only seven ammonoid genera are known from this locality, including Properrinites sp. from the family Perrinitidae, which is the first record of this family from the Urals. Finds

Abstract This paper contains the first descriptions of an assemblage of non-ammonoid cephalopods from the Upper Asselian-Lower Sakmarian limestones of the Shakh-Tau reef. In this paper 16 species of 15 genera belonging to orders Oncocerida (?) and Nautilida (suborders Nautilina and Liroceratina), of which seven genera and 13 species are new, are described. Two species are described in open nomenclature

Abstract This study provides a description of the Devonian radiolarian associations of northern Eurasia and discusses their role in the evolution of Earth’s biosphere. It contributes to evolutionary studies of the Earth and its organic world by reconstructing the diversity dynamics of the Devonian radiolarian biota and the chorology of its components, at the same time revealing the biostratigraphic

Abstract Bacterial paleontology studies the roles played by organisms in the genesis of sediments and ores. It is, therefore, important to clearly distinguish in-situ biological objects present in the rock material from various contaminants of later origin and from mineral structures that merely resemble organisms. The same is crucial for correct interpretation of alleged biogenic structures found

Abstract— This work presents the results of the study of microbiomorphs (pollen, spores, phytoliths, diatoms, shells of testate amoebae, sponge spicules, plant tissue remains) from the paleosols of the Upper Quaternary deposits of the Kolyma Lowland. The analysis of their abundance and diversity, as well as the relationships between different types of biomorphs, made it possible to clarify the genesis

Abstract Biomarkers, due to their structure and biochemistry, are resistant to soil degradation and mineralization under particular environmental conditions, and therefore can provide molecular evidence of paleobiota and past land vegetation, and of the intensity of not only modern, but also past biochemical processes in the biosphere. Parameters of the humus group composition, optical densities of

Abstract The results of the phylogenetic analysis and analysis of the physiological characteristics of metabolic activity of strains isolated from frozen sedimentary rocks collected in the Antarctic and the Severnaya Zemlya archipelago are reported in this article. A comparable abundance of cultured cells and close morphological diversity of colony morphotypes were revealed in all samples. Representatives

Abstract This article reports the first results of studies on microbially mediated organomineralization in carbonate ooids from the Paleozoic sections of the Timan–Northern Ural region, which were formed in different environments and had different original mineral composition (calcite, Mg-calcite, and dolomite). Using a scanning electron microscope, mineralized microbial biofilms preserved in various

Abstract The use of X-ray microtomography, neutron tomography, scanning electron microscopy and X‑ray microanalysis in the study of stromatolites is discussed, and the advantages of each of these methods are summarized. Scanning electron microscopy allows study of the morphology of the object surface. Information about the composition and ratio of chemical elements of surface structures can be obtained

Abstract Early Pleistocene volcanic soil series exposed in archaeological sites of the Lori Plateau and the Upper Akhurian Lowland of the Armenian Upland were studied. The study considers the isotopic composition of organic carbon and the content of n-alkanes, not previously analyzed in this area. Both these parameters indicate the waterlogged conditions of Early Pleistocene soil formation as is also

Abstract— This review summarizes the results of the study of bacterial communities of seasonally thawed soil horizons in the polar tundra of Russia. It has been shown that the representatives of different physiological groups of microorganisms developing in the soils of this extremely cold habitat are involved in the global biological cycle of carbon. Light has been thrown upon the role of microorganisms

Abstract Proportions of 13C/12C and 15N/14N isotopes were identified in different woody compartments of birch (Betula pendula Roth), pine (Pinus sylvestris L.) and aspen (Populus tremula L.) trunks in preforest-steppe and pine-birch forests of the Middle Urals using mass spectrometry. The data were analyzed and interpreted from the perspective of the biochemical processes of carbon and nitrogen metabolism

Abstract A gigantic shell of a rudist of the genus Valletia is described for the first time from the Lower Berriasian of Southwest Crimea. The lithology and geological age of the host rock are discussed.

Abstract Some characteristic features of the colonial morphology of the bryozoan order Melictrititida Pergens, 1890 are discussed. Although this order belongs to the class Stenolaemata, these features were not indicated in the diagnosis of this class. These features include funnel-shaped zooids, either elongated or shaped like shortened chambers; calcareous facettes, rhomboidal, pentagonal, or hexagonal;

Abstract Twenty types of conodont element pathology are considered, and the examples of Abrasio, Accessio, Caudatio, Depressio, Diminutio, Duplicatio, Fusio, Impressio, Jugatio, Occlusio, and Suppressio pathologies identified in the Devonian of the Voronezh Anteclise are illustrated in detail. All pathological phenomena are assigned to five genetic groups: (1) mechanical damage to hard tissue; (2)

Abstract— The first kotlassiid species of the Vyazniki Faunal Assemblade, Microphon terminalis sp. nov., is described from the terminal Permian of the Bykovka locality (Vladimir Region, Russia). The diagnostic characters of M. terminalis are the preservation of nasolacrimal duct throughout ontogeny and some features of the marginal teeth, such as the moderately thickened proximal parts of the crowns

Abstract A crown of Streptoiocrinus gen. nov., with its articulated stem, the columnals of which have long been known in the Billingen and Volkhov regional stages (Floian and Dapingian stages) of the Leningrad Region and Estonia are described. A detailed study of the crown and stem morphology showed that the new genus belongs to the disparid crinoid superfamily Ioсrinacea. This genus is the first mass

Abstract In Mongolia, fossil mammals are known from the Upper Jurassic, Lower and Upper Cretaceous, all series of the Paleogene and Neogene, as well as the Pleistocene. Over 335 new species and more than 185 new genera of fossil mammals (not including synonyms) were described from Mongolia up to the end of 2019. The most important results in the last hundred years of research, that most strongly influenced

Abstract One new damselfly genus and species, Progophlebia tarasenkovae gen. et sp. nov., and two new species from known genera: Progoneura kityakensis sp. nov. and Kennedya tyulkinensis sp. nov. of the family Kennedyidae (Odonata: Protozygoptera) from several Permian localities (Vyazovka, Kityak, and Tyulkino) of European Russia are described. All known representatives of the family are briefly reviewed