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The Internal Structure of Agnatha and Origin of Vertebrates Including Humanity
AbstractAgnatha are archaic vertebrates that appeared in the Earth’s biosphere in the early Paleozoic (Ordovician), earlier than fishes. The paper...
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Two high Value Geoheritage Sites on Sõrve Peninsula (Saaremaa Island, Estonia): A Window to the Unique Late Silurian Fauna
The Upper Silurian exposures on Saaremaa Island, mostly represented by small coastal cliffs, are the best in Estonia. Among these exposures are two...
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Erratum to: Paleontological Journal
An Erratum to this paper has been published: https://doi.org/10.1134/S0031030121340013
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Basic Characteristics and Evolution of Sanjiang Tethys Archipelagic Arc-Basin System
The rise of plate tectonics theory in the 1960s contributed to a revival of the long-neglected idea of continental drift, and revolutionized Earth...
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a monospecific genus of marine snakes in the family Simoliophiidae; about 3 feet long, H. terrasanctus is especially notable for its hindlimbs; known...
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Brain of the most ancient vertebrates (Agnatha: Heterostraci) and man: Comparison and inferences
Natural brain casts of Devonian heterostracans (Agnatha: Heterostraci) are compared for the first time with the brain of contemporary man. The...
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Heterostracan vertebrates and the Great Eodevonian Biodiversification Event—an essay
The oldest vertebrates are Early Cambrian, cephalized unossified species (craniates) from China. The oldest armoured species (euvertebrates) are...
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An interim global bioregionalisation of Devonian areas
We present an interim Devonian bioregionalisation in which previous zoogeographical and biogeographical areas of Devonian taxa are reviewed. This...
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New records of psammosteids (Heterostraci) from the Aruküla Regional Stage (Middle Devonian) of the Leningrad Region, Russia
Previously unknown exoskeletal plates of certain Middle Devonian psammosteids, i.e., Pycnosteus palaeformis Preobrazhensky, Psammolepis proia ...
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“thick head,” a suborder of relatively small ornithischian dinosaurs; bipedal and generally herbivorous, they are characterized by a very thick skull...
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The concept of macroevolution in view of modern data
Macroevolution, or evolution of superspecies taxa is the process of transformation of “organismal” life flows on the Earth during its geological...
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Development of the exoskeleton in osteostracans (Agnatha, vertebrata): New evidence of growth
In the past decade, considerable progress has been made towards a better understanding of the development of the dermal skeleton in osteostracans....
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The growth of the skull roof plates in Arabosteus variabilis (Acanthothoraci, Placodermi) from the Early Devonian Jauf Formation (Saudi Arabia): Preliminary results
The skull roof growth of Arabosteus variabilis (Acanthothoraci), from the Pragian-Early Emsian of Saudi Arabia is studied on the basis of...
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New data on osteostracans (Agnatha) from the Lower Devonian of the Severnaya Zemlya Archipelago
The osteostracans Reticulaspis menneri gen. et sp. nov. and Nucleaspis unica gen. et sp. nov. from the Lower Devonian Severnaya Zemlya Formation of...
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Patterns and mechanisms of changes in the dermal cover of agnathans and fishes
According to the leading Russian evolutionary morphologists, A.N. Severtsov, A.V. Rumyantsev, and I.I. Schmalhausen, the skin and its derivatives in...
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On the morphology and taxonomic position of Ungulaspis arctoa (Osteostraci, Agnatha) from the lower devonian of the Severnaya Zemlya archipelago
An additional study of the cephalic shield and trunk scales of the holotype of Ungulaspis arctoa Afanassieva et Karatajūtė-Talimaa has shown that the...
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Oredezhosteus, a new psammosteid genus (Heterostraci, Psammosteiformes) from the Lower Frasnian (Upper Devonian) of the Main Devonian Field
A new psammosteid, Oredezhosteus kuleshovi gen. et sp. nov., from the Amata Regional Stage (Lower Frasnian) of the Leningrad Region is described. In...
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A new species of psammosteiform heterostracan (Agnatha) from the Givetian (Middle Devonian) of the Voronezh Region
A new pycnosteid species, Schizosteus shkurlatensis sp. nov. (Agnatha, Psammosteiformes), from the Staryi Oskol beds (Givetian, Middle Devonian) of...
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Evolution of taxonomic diversity in amphiaspids (Agnatha, Heterostraci: Amphiaspidiformes) and the causes of extinction in ecologically favorable conditions
Changes in the taxonomic composition of Early Devonian amphiaspids represented in Siberia by two assemblages (from the northwestern Siberian Platform...