scholarly journals Upper Devonian brachiopods from the core of the Kurgan-Uspenskaya-1 key borehole (south-western outlying areas of Western Siberia)

LITOSFERA ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 560-573
Author(s):  
A. G. Mizens ◽  
L. I. Mizens
Keyword(s):  
East European Platform ◽  
Western Siberia ◽  
Upper Devonian ◽  
Tectonic Block ◽  
Research Subject ◽  
The South ◽  
The Urals ◽  
East European ◽  
The Core ◽  
Host Rocks

Research subject. Brachiopods from the core of the Kurgan-Uspenskaya-1 parametric borehole. The borehole was drilled in the south of Western Siberia 80 km southeast of the Kurgan town. Brachiopods were collected at a depth of 1,525.4 m in the IV tectonic block (core interval 1,450–1,794 m) in the greenish-gray marls of the Famennian stage of the Upper Devonian.Materials and methods. The paleontological material is presented in the form of complete undamaged shells and individual valves of small- and medium-sized brachiopods. The safety of brachiopods makes it possible to determine their species and genera, sometimes in open nomenclature. The article provides a brief description of the available material.Results. 11 species of brachiopods of the subtype Rhynchonelliformea belonging to six orders and nine genera were identified. The following ten species were described: Orbinaria fallax (Pand.), Semiproductus amplus Bubl., Schuchertella sp., Dalejina? sp., Camarotoechia panderi (Sem.et Moell.), C. volucera Nal., Athyris tobolica Nal., Cleiothyridina tenuilineata (Row.), Cl. ex gr. pectinata (Sem. et Moell.), Retzia? sp. The presented information allows conclusions about the age of the sediments enclosing the brachiopods under study and expands the existing knowledge of both the composition of the Upper Famennian brachiopods of the basement of the south of Western Siberia and their geographical and stratigraphic distribution.Conclusion. An analysis of the stratigraphic distribution of the described brachiopods taking into account data on foraminifera allowed us to determine the age of the host rocks as the very top of the Famennian stage. The composition of the brachiopods allows these rocks to be correlated with coeval deposits of the East European Platform, Timan, the Urals, Kuzbass, the Gorny Altai, Kazakhstan and North America.

The Oligocene Reference Section in the South of the East European Platform (Northern Ergeni)

2019 ◽  
Vol 27 (4) ◽  
pp. 442-474 ◽  
Author(s):  
A. S. Zastrozhnov ◽  
S. V. Popov ◽  
V. N. Beniamovsky ◽  
V. A. Musatov ◽  
M. A. Akhmetiev ◽  
...  
Keyword(s):  
East European Platform ◽  
The South ◽  
East European ◽  
Reference Section

scholarly journals Is Bombus pomorum (Panzer, 1805) (Hymenoptera: Apidae) a new bumblebee for Siberia or an indigenous species?

2021 ◽  
Vol 13 (1) ◽  
pp. 17574-17579
Author(s):  
Alexandr Byvaltsev ◽  
Svyatoslav Knyazev ◽  
Anatoly Afinogenov
Keyword(s):  
20Th Century ◽  
Range Expansion ◽  
Western Siberia ◽  
Indigenous Species ◽  
The South ◽  
The Urals ◽  
The Caucasus ◽  
Bumblebee Species ◽  
First Time ◽  
Observation Results

Bombus pomorum (Panzer, 1805) is known from Europe, Anatolia, the Caucasus, and to the Urals in Russia.  Two specimens have been collected in the south of western Siberia for the first time.  It is possible that the species is indigenous to Siberia but was not discovered until regular observations were made.  There is also a possibility that this observation results from an expansion of the range of B. pomorum.  We consider the evidence that our study coincided with a range expansion of the bumblebee species B. pomorum and B. sylvarum (Linnaeus,1761) near the end of 20th century.  The distribution and abundance of B. pomorum in Russia and conservation efforts are also discussed.

scholarly journals BIOSTRATIGRAPHY AND CORRELATION OF DEVONIAN DEPOSITS IN THE SOUTH-WEST SEGMENT OF THE EAST-EUROPEAN PLATFORM BY BRACHIOPODS

2021 ◽  
pp. 74-84
Author(s):  
O.Yu. Kotlyar
Keyword(s):  
Middle Devonian ◽  
East European Platform ◽  
Black Shales ◽  
The South ◽  
Perfect Agreement ◽  
Early Devonian ◽  
East European ◽  
South West ◽  
Brachiopod Fauna

The main aim of the paper is to study the detailed distribution of the brachiopod fauna throughout the entire Devonian section from the Silurian-Devonian boundary at the Podilla region to the Devonian-Carboniferous boundary at the SW slope of the Dnipro-Donets Depression (DDD). The Devonian brachiopods (mainly Productids, Spiriferids and Rhynchonellids) of the south-west segment of the East-European Platform (EEP) are reviewed from the DDD, Volhyn-Podilla monocline (VPM) including the L’viv Paleozoic Trough, and Fore-Dobrogea Paleozoic Depression (FDPD). The faunas of these regions are mutually related and compared to the Devonian faunas of the EEP (Russia) and Pripyat’ Depression (Belarus). In recent years several paleontological investigations have broadened and deepened our knowledge of the Devonian biostratigraphy of Ukraine. Based on systematic studies of brachiopods from the SW segment of the EEP we recognize four successive faunas corresponding to four great marine transgressions — Early Devonian (Tiwer Series, the Monograptus uniformis Zone), Middle Devonian (Givetian Stage, the conodont varcus Zone), Late Frasnian (the conodont Upper rhenana — linguiformis Zone), and Early Famennian (the conodont triangularis-crepida Zone). The Early Devonian association includes Howellella angustiplicata, Plectodonta maria, and Daiya navicula and others which are similar to late Silurian brachiopods by their generic features (represented the genus common with the Upper Silurian). The Middle Devonian assemblages contain: Emanuella volhynica, Atrypa (Desquamatia) ventricosa, Chonetes sarcinulata, and Poloniproductus productoides at VPM sections (Givetian Stage, the varcus Zone), as well as Variatrypa sokolovae (Eifelian Stage), but in the DDD sections the impoverished association with Stringocephalus cf. burtini (Eifelian Stage) and Atrypa uralica (Givetian Stage) occur. The Late Frasnian association is represented by dominance of Theodossia tanaica, T. evlanensis, T. livnensis at all regions — VPM, DDD and FDPD (the Upper rhenana — linguiformis zones). The Early Famennian association is represented by ex Cyrtospirifer archiaci = Cyrtospirifer asiaticus and Cyrtospirifer ljachovichensis, Cyrtiopsis sp., Ptychomaletoechia zadonica, Iloerhynchus tichomirovi, Ardiviscus ex gr.herminae, Steinhagella annae etc. at DDD and by the same association plus Dmitria angustirostris at VPM (the triangularis-crepida zones). Brachiopods near the D-C boundary have been recorded so far from the black shales fossiliferous deeper water facies only in DDD: Spinocarinifera nigra, S. fallax, Sphenospira julii, Parallelora sp. (the Siphonodella praesulcata Zone). The result of our systematic study of productids, spiriferids, rhynchonellids, atrypids, and athyrids from Ukrainian sections are in perfect agreement with, and supplement to the previous investigations of Middle and Upper Devonian deposits at VPM and DDD, suggesting their important role for precising boundaries between the Devonian stages and horizons in SW segment of EEP. The essential role of brachiopods for the Devonian biostratigraphy and correlations with the East-European biozonation is confirmed.

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