Published in Paleontological Journal
AbstractAquatic and, in particular, marine invertebrates demonstrate a wide range of sexual reproduction traits, which is unsurprising given their enormous morphological and ecological diversity. The descriptive data published on their reproduction are massive. Providing an integrated picture of their evolution, however, remains difficult due to th...
Published in Paleontological Journal
AbstractThe fossil record of terrestrial tortoises in Argentina is patchy. The aim of the present contribution is to describe a new species of the genus Chelonoidis coming from the Middle Pleistocene of Buenos Aires province. This new species shows a unique combination of apomorphic and plesiomorphic characters unnoticed in other South American tax...
Published in Paleontological Journal
AbstractVendobionta is a large group of Precambrian Metazoa, which is characterized by a set of symmetry elements arranged in a certain system of mutual subordination and typically not found in unitary multicellular animals. The radial axis of the 2nd, 3rd or 6th order, which organizes the arrangement of longitudinal antimeres of the body is the ma...
Published in Paleontological Journal
AbstractA study of Lower Permian radiolarians from the Kondurovka and Verkhneozernoe sections, located on the right bank of the Sakmara and Ural rivers on the western slope of the South Urals, was carried out. Analysis of the distribution of 104 species of radiolarians in the study area made it possible to establish three successive ecozones in the...
Published in Paleontological Journal
AbstractThis review summarizes literature data on phylogenomics, indicating genomic–morphogenetic correlations that determine the metazoan body plan and phenotypic complexity. Radical, macroevolutionary transformations of the bilaterian body plan, which correlate with duplications or losses of individual Hox genes of an ancestral cluster, or with i...
Published in Paleontological Journal
AbstractThe concept of modular organization, proposed quite a long time ago is still not sufficiently advanced. Until now, the concept has not been widely used and cannot be considered as generally accepted. This is partly due to the complexity of the elaboration of the main notions. The notions of “colonial organism” and “modular organism” and the...
Published in Paleontological Journal
AbstractAmong the specific characters of holothurians, the main ones are: the structure of the ambulacral (water vascular) system, the presence of oral (buccal) tentacles, the calcareous ring, and bilateral symmetry of the larval and definitive stages of development. In all modern Eleutherozoa, except Holothuroidea, the five primary outgrowths of t...
Published in Paleontological Journal
AbstractThe results of a comprehensive microfaunistic study of the Ogarkovo Upper Jurassic–Lower Cretaceous reference section on the Unzha River (Kostroma oblast) are presented. The Lower Kimmeridgian, the Upper Volgian and the Ryazanian stages contained variably mineralized three-dimensional remains of radiolarians. The radiolarian genera Protoval...
Published in Paleontological Journal
AbstractMorphogenesis evolves through evolutionary modifications in ontogeny under environmental factors. The same genotype can serve as a basis for different phenotypes, depending on environmental conditions. Changes in the rate and direction of cell proliferation can lead to phenotype modifications following Thompson’s transformation theory. When...
Published in Paleontological Journal
AbstractSpinaeblattinabaekthoensis sp. n. (Insecta, Blattaria, Mesoblattinidae), is recorded from the Third Member of the Sinuiju Formation from Paektho-dong, Sinuiju City, North Phyongan Province, Democratic People’s Republic of Korea (DPRK). It differs from type species S. myanmarensis Hinkelman, 2019 from Cenomanian North Myanmar amber in breadt...
