Chapter 7. Early Precambrian Ferruginous Quartzites (Jaspilites)Pleiades Publishing Ltd - - 2024
M. M. Astafieva
Microfossils of presumably bacterial origin were found in 2.7–2.8 Ga banded ferruginous quartzites in Karelia and the Kola Peninsula. The determination of organic carbon content and balance calculations showed that these ferruginous quartzites accumulated in an organic-rich environment. A comparative analysis of the morphology of modern and Neoarchaean microorganisms suggests the bacterial origin ...... hiện toàn bộ
Symmetry in topography and microstructure of vertebrate skin derivativesPleiades Publishing Ltd - Tập 48 - Trang 1284-1294 - 2014
O. F. Chernova, A. B. Kiladze
Examples of symmetry and asymmetry of ectomesodermal skin derivatives are considered. In biosymmetrics, this question is only mentioned in a few studies. At the same time, in vertebrates, which are characterized by bilateral symmetry of the body, abundant and diverse skin derivatives include various symmetrical and asymmetrical structures. The main objects involved in the study are fish scales (60...... hiện toàn bộ
A New Pareiasaur (Parareptilia) from the Lower Vyatkian (Upper Permian) of Orenburg Region, RussiaPleiades Publishing Ltd - Tập 57 - Trang 646-658 - 2023
E. I. Boyarinova, V. K. Golubev
A new genus and species of pareiasaurs, Senectosaurus karamzini Boyarinova et Golubev gen. et sp. nov., is described based on remains of the postcranial skeleton of a large adult individual from the Lower Vyatkian of the Preobrazhenka-2 locality (Orenburg Region). The new pareiasaur is characterized by large postcranial platform-type osteoderms. The osteoderms are flattened, with flat ventral and ...... hiện toàn bộ
Patterns of changes in Theromorph taxa of Permian terrestrial communities of Eastern EuropePleiades Publishing Ltd - Tập 49 - Trang 70-78 - 2015
M. F. Ivakhnenko
The evolution of Late Permian tetrapod communities which include Theromorpha is examined in the territory of Eastern Europe. It is noteworthy that changes in the taxonomic composition of analogous ecobiomorph groups are connected with certain biotic or abiotic factors. The analysis of these factors allows the recognition of presumable causes of the crises in communities, which are determined to a ...... hiện toàn bộ
The steps of vascular plant and land ecosystem evolutionPleiades Publishing Ltd - Tập 47 - Trang 953-960 - 2013
Yu. V. Gamalei, S. N. Scheremet’ev
Basal steps of higher plant evolution are reconstructed by the structure of their conducting tissues. Historically, transport networks are derivatives of buffer zones for symbiotic exchange between prokaryotic pro-cursers. Two symbiogenetic acts (prochlorophytes + protists → higher algae; marine algae + fungi → higher land plants) are fixed in plant body by two networks for water transport. Descen...... hiện toàn bộ
Review of the Jurassic Weevils of the Genus Belonotaris Arnoldi (Coleoptera: Nemonychidae) with a Straight RostrumPleiades Publishing Ltd - - 2022
A. A. Legalov
Species of the genus Belonotaris Arnoldi, 1977 with a straight rostrum from the Middle-Upper Jurassic of Kazakhstan and China are revised. Arnoldibelus Legalov, 2009, syn. nov. and Sinoeuglypheus Yu, Davis et Shih, 2019, syn. nov. are synonymized with Belonotaris. The diagnosis of Belonotaris is supplemented, and its family placement is established. A key to B. daohugouensis (Yu, Davis et Shih, 20...... hiện toàn bộ