Late Permian and Early Triassic Conchostracans from the Babii Kamen Section (Kuznetsk Coal Basin)

The Late Permian and Early Triassic conchostracans from the Babii Kamen section (Western Siberia) were studied. The conchostracans were collected from the section during the field work in 2015–2018. It was found that the conchostracans from the Babii Kamen section are characterized by a rather high taxonomical diversity: we identified five Late Permian conchostracan species (Pseudestheria novacastrensis (Mitchell, 1927), Cornia papillaria (Lutkevich, 1937), Megasitum harmonicum Novojilov, 1970, Megasitum lopokolense Novojilov, 1970, and Echinolimnadia mattoxi Novojilov, 1965) and two Early Triassic species (Concherisma tomensis Novojilov, 1958, Cyclotunguzites gutta (Lutkevich, 1938). The discovered conchostracan species occur frequently in the Permian and Triassic sections of other regions and are useful for regional biostratigraphy and interregional correlation

Permian nonmarine bivalve zonation of the East European platform

New finds and revision of available collections of nonmarine bivalves provided grounds for development of a zonal scale for terrestrial sequences of the Permian System based on species belonging to the genus Palaeomutela Amalitzky, 1891, which are characterized by regular changes in the structure of the shell hinge. The scale includes two parallel zonal successions that are based on the stratigraphic distribution and evolutionary trends of two morphological lineages of the genus. The zonal succession based on development of the P. umbonata group (dwellers of mobile waters and silty-psammitic substrates) includes 11 range zones: stegocephalum, ovatiformis, umbonata, quadriangularis, krotowi, wohrmani, numerosa, ulemensis, keyserlingi, curiosa, golubevi. The zonal succession based on development of the P. castor group (dwellers of calm waters and silty-pelitic substrates) includes eight range zones: larae, castor, olgae, doratioformis, marposadica, fischeri, obunca, amalitzkyi. The proposed zonal units are correlated with scales based on ostracod, fish, and tetrapod fossils. New species Palaeomutela golubevi sp. nov. and P. amalitzkyi sp. nov. are described with the extended diagnosis of the genus Palaeomutela. © 2014 Pleiades Publishing, Ltd

Conodonts from the Upper Permian type strata of European Russia

Conodonts have been derived from the marine shallow-water deposits of the Kazanian Stage and contain the multielement species of Sweetina, Merrillina and Stepanovites. On the base of the occurrence of Sweetina triticum Wardlaw and Collinson, 1986 the Lower Kazanian substage may be compared with the uppermost Roadian and Lower Wordian deposits of North America. The Upper Kazanian substage containing Merrillina divergens? (Bender and Stoppel, 1965) and Stepanovites meyeni Kozur and Movsovic, 1975 may be correlated with the Upper Wordian, and possibly with the lowermost Capitanian

A national geopark in the republic of tatarstan (Russia): A feasibility study

The area, which occupies the right bank of the Volga River from the mouth of its tributary, Sviyaga River, to the southern border of Tatarstan, and the right bank of the Kama River from its mouth to the northeastern border of Tatarstan, is considered to warrant the possible creation of a national geopark. The area is characterized by well-defined limits, and it occupies 2,080 km2 that is commensurate with an area of many successfully functioning geoparks. It has more than 150 years of history of comprehensive geological studies carried out by prominent Russian and foreign geologists. A significant number of geosites (29) of different types and significance levels accessible to visitors are revealed there. The majority of the geosites are of interest first of all in terms of stratigraphy and palaeontology as well as geomorphology, tectonics, petrology, hydrogeology, and history of geology and mining. These geosites allow study of the history of the Earth's organic world in the Middle-Upper Permian, geological events, and processes that occurred in this region, as well as landform evolution. This area is of aesthetic value owing to the variety and beauty of its natural landscapes. It also contains abundant nongeological natural, historical, and cultural heritage sites attractive for tourists. It is also characterized by a high level of economic development, well-developed infrastructure, and the existence of officially protected sites that occupy a fifth of the territory. The area is of high educational significance as well. It has, for a long time, been used as a geological training ground for students of the Kazan State University, Russia. Moreover, the scientific and methodical basis for seven educational-excursion routes including visiting particularly interesting geological, historical, and cultural sites of the planned geopark has been already developed. The comprehensive evaluation of this area shows that it meets all necessary criteria for geopark creation. © 2010 Springer-Verlag

The Permian nonmarine bivalve Palaeanodonta Amalitzky, 1895: Position in the modern Bivalvia system

© 2015, Pleiades Publishing, Ltd. Bivalves assigned to the genus Palaeanodonta Amalitzky, 1895 comprise more than 30 species and are widespread in malacofaunas of the Permian Period in both Eurasia and Gondwana. The history of the establishment of Palaeanodonta, changes in the opinion of the author of the genus concerning its composition and type species are considered. Relationships of Palaeanodonta with the genus Naiadites Dawson, 1860, which was initially regarded as its senior synonym, and with Anthraconaia Trueman et Weir, 1946, which shows superficial similarity, are analyzed. Certain characters, such as the external opisthodetic ligament, reduced pseudotaxodont hinge, crossed lamellar comarginal and radial shell microstructure, resulted in the conclusion that the type species of the genus, Unio castor Eichwald, 1860, the species close to it, i.e., P. longissima (Netschajew) and P. rhomboidea (Netschajew), and also the species included in the group Palaeanodonta fischeri (Amal.) (P. subcastor (Amal.), P. okensis (Amal.), P. parallela (Amal.), P. obunca (Netschajew), P. amalitzkyi (Silantiev)), as well as the group Palaeanodonta dubia (Amal.) (P. umbonata (Amal.), P. sibirzevi (Amal.), P. indeterminata (Amal.), P. monstrum (Amal.)) belong to the genus Palaeomutela Amalitzky, 1892. The species listed are similar in the reduced pseudotaxodont hinge apparatus, which is characterized by a narrow hinge area and few small teeth, which are usually at most ten in number, and occasionally fewer down to complete disappearance. This character is the basis for the recognition of the subgenus Palaeanodonta Amalitzky, 1895 within the genus Palaeomutela Amalitzky, 1892. The diagnoses of the genus, subgenera, and their species composition are provided

Hypoanthraconaia: a new genus of non-marine bivalve molluscs from the Early Permian of Far East Russia

© 2016, Paläontologische Gesellschaft.Early Permian continental deposits include a large number of localities containing anthracosiid-like non-marine bivalves traditionally assigned to Anthraconaia Trueman and Weir, 1946, Palaeanodonta Amalitzky, 1895, and Palaeomutela Amalitzky, 1892. In most cases, these classifications are only tentative due to insufficient preservation in which the shells are missing their main characteristics: the ligament and the hinge. Non-marine bivalves from the Early Permian Upper Pospelovka Subformation of Russky Island (South Primorye, Far East Russia), described here as Hypoanthraconaia gen. nov., differ morphologically from the above genera by a set of external features including the initial shell, the mode of intersection of the growth lines with the dorsal margin, and the details of the sculpture. Hypoanthraconaia gen. nov. shows the most external similarity with “atypical” anthracosiid-like morphotypes of Anthraconaia that are widespread in the Late Pennsylvanian and Early Permian of eastern North America, and the Stephanian and Early Permian Lower Rotliegend of northwestern Europe. On this basis, the new genus is conventionally assigned to the family Naiaditidae Scarlato and Starobogatov, 1979

Palynology of the Kazanian stratotype section (Permian, Russia) : palaeoenvironmental and palaeoclimatic implications

Palynomorph assemblages reflect changes in land plant communities and are thus significant proxies to interpret palaeoenvironmental and palaeoclimatic changes. The Middle Permian of the East European Platform is crucial to the understanding of marine and non-marine palaeoclimate archives and interregional correlations of marine and non-marine successions, utilizing palaeoclimate signatures documented in the palynological record. New palynological data from the Kazanian stratotype section are presented and interpreted with respect to palaeoenvironment and palaeoclimate. This dataset will serve as a basis for ongoing studies on the type area of the Kazanian and the mid- Permian biodiversity patterns, preceding the end-Guadalupian crisis and the changes of the end- Permian biotic diversification followed by the most severe extinction event in Earth’s history at the Permian-Triassic boundary.http://link.springer.com/journal/125492016-06-30hb201

Revision of Late Permian nonmarine bivalves of the genus Verneuilunio Starobogatov, 1987 and its type species Naiadites verneuili Amalitzky, 1892

© 2015, Pleiades Publishing, Ltd. The genus Verneuilunio Starobogatov, 1987 (with the type species Naiadites verneuili Amalitzky, 1892) was distinguished from the genus Palaeanodonta Amalitzky, 1895 based on the differences in the hinge line, which were recognized using published data. Both genera were included in the family Palaeanodontidae Modell, 1964, which the author regarded as a subjective synonym of the family Palaeomutelidae Lahusen, 1897 (=Palaeomutelidae Weir, 1969). Revision of the collection of V.P. Amalitzky performed by the authors has shown that the initial diagnosis of the genus contains certain inaccuracy complicating identification and assignment to higher-rank taxa. The present study improves the diagnosis of the genus Verneuilunio and provides a detailed description of its type species Naiadites verneuili Amalitzy, 1892. Based on the presence of the duplivincular, slightly amphidet ligament, the genus Verneuilunio is referred to the family Naiaditidae Scarlato et Starobogatov, 1979. This character sharply distinguishes this genus from other co-occurring Unio-like genera of Late Permian nonmarine bivalves, i.e., Palaeomutela Amalitzky, 1892, Palaeanodonta Amalitzky, 1895, Oligodontella Gusev, 1963, and Opokiella Plotnikov, 1949. Verneuilunio is most similar in appearance to atypical Anthraconaia Trueman et Weir, 1946, which is characterized by Unio-like outline and widespread in the Upper Carboniferous. Data processing of morphometric parameters of Verneuilunio verneuili Amalitzky, 1892 and A. pruvosti (Tschernyshew, 1931), which is most similar to it in external outline has revealed statistically significant distinctions in elongation of the posterior shell end. According to available data, the geographical range of Verneuilunio is restricted to the central part of the East European Platform and its stratigraphic range falls in the lower substage of the Severodvinian Stage (=Early Capitanian)

The variations of the δ¹³C and δ¹⁸O in the Middle Permian rocks, Volga river outcrops, Russia

© 2006-2017 Asian Research Publishing Network (ARPN). Data on stable isotopes of carbon and oxygen of the Permian carbonate rocks play an important role to create geochemical frame of the Permian formations. The stable isotopes records reflect changes in chemical composition of carbonate rocks in dependence on regional and global factors in history of the Permian period. Variations of stable isotopes across the Middle Permian rocks correlate with the stratigraphic boundaries and paleoenvironmental changes

Late Permian palynomorph assemblages from Ufimian and Kazanian type sequences in Russia, and comparison with Roadian and Wordian assemblages from the Canadian Arctic

Tentative biostratigraphic correlations, based on marine faunas, have been made by various workers between Ufimian and Kazanian sequences in their type areas in the Volga-Urals region of Russia and Roadian and Wordian sequences in their type area in Texas, United States. Unfortunately, palynological correlation between the Russian and United States sequences is not possible, due to lack of data from the latter. However, detailed palynological data are available from rocks of Roadian and Wordian age in the Canadian Arctic Archipelago, and therefore indirect correlations are possible. Palynomorph assemblages from the Canadian Arctic and other circumpolar areas, such as the southern Barents Sea and Greenland, are different from those of the Ufimian and Kazanian Russian sequences in their type areas. This is likely to be the result of variations in the parent flora in response to significant paleoclimatic differences. For example, the climate of the Volga-Urals region in Late Permian times was probably hot and arid, whereas that of the Canadian Arctic, Barents Sea, and Greenland was cooler and probably more humid