Oleg Anatolyevich Lebedev- PhD
- Senior Researcher at Russian Academy of Sciences
Oleg Anatolyevich Lebedev
- PhD
- Senior Researcher at Russian Academy of Sciences
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74
Publications
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1,324
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Introduction
Current institution
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September 1979 - present
Publications
Publications (74)
The systematic composition of vertebrate assemblages, including psammosteid agnathans, placo-derms (mainly antiarchs), acanthodians, chondrichthyans, sarcopterygians, and actinopterygians in various regions of the East European Platform during the Rechitsian time of the Late Frasnian (Late Devonian) is analyzed. New materials on antiarchs, acanthod...
Microfossil assemblage includes teeth of bransonelliform, symmoriiform, hybodontiform, anachronistid neoselachian, petalodontiform, putative orodontiforms, dental plates of chondrencheliform and cochliodontid cartilaginous fishes. Scales of the ctenacantid, hybodontid and euselachian morphotypes, acanthodids and ray-finned fishes were also found. A...
D.V. Obruchev is an outstanding paleontologist, paleoichthyologist, and founder of the Russian national paleoichthyological school. Obruchev's scientific life was spent within the walls of the Paleontological Institute of the USSR Academy of Sciences, with which he was inextricably linked for more than forty years. The book is based on his letters,...
A new species of Dunkleosteus, D. tuderensis sp. nov., is named based on an infragnathal from the Famennian of the Tver Region, Russia. CT scanning of the holotype revealed two high-density bony constituents comparable in position and interrelations to components described for coccosteomorph arthrodires, supported by the presence of at least two cl...
Restudy of Campyloprion annectans Eastman, 1902 from North America demonstrated that neither specimen included is diagnostic at the species level; thus, the species name is a nomen dubium. Since this species was designated as the type species of the genus, this requires suppression of the generic name also. Another species earlier assigned to Campy...
Antiarch placoderm fishes were an abundant component of the Middle Paleozoic vertebrate assemblages. Despite a large number of known taxa and specimens, the morphology and function of the skeletal elements of their jaws is inadequately known. Because of this, questions regarding their feeding modes and their roles in the trophic webs remain open. W...
The ancestry of chimaeriform chondrichthyan fishes can be traced back to the Late Triassic (∼220 Ma). To date, only one chimaeriform suborder, the Echinochimaeroidei, has been recognized from the Palaeozoic. The origin and evolution of the chimaeriforms has been a matter of debate for more than a hundred years. This problem is aggravated by the sca...
Very rare chondrichthyan spines from the Famennian (Upper Devonian) of European Russia are referred here to ctenacanthiforms, euselachians and a chondrichthyan group of uncertain systematic position. Ctenacanthus Agassiz, 1837 is recorded from the lower and middle Famennian of the central and north-western parts of the area. Sculptospina makhlaevi...
A new dipnoan genus and species Anchidipterus dariae Krupina, gen. et sp. nov. (Dipteridae) is described based on a lower jaw specimen from the Famennian (Upper Devonian) of the Bilovo locality (Russia, Tver oblast, Toropets district). This taxon is characterized by the short and broad mandibular symphysis, the rostrolateral orientation of the mesi...
The new taxon of chimeriform fish has existed during the 346–323 million years interval. Its study made possible analysis the paths of early diversification of chimaeriform fishes, the phylogenetic history of which appears to be more complex and mosaic than previously thought.
Each piece of data is valuable for unearthing the earliest history of tetrapod origin. Despite frequently incomplete preservation, each skeletal element provides important information on the morphology, phylogeny and faunistic diversity of early tetrapodomorphs. We describe here new and earlier collected material from the fossil vertebrate site Yam...
New vertebrate finds from the Khovanshchinian Regional Stage (lower uppermost Famennian, Upper Devonian) made an important contribution to our knowledge of the composition and distribution of vertebrate assemblages in Central Russia. The remains of the latest arthrodires found for the first time in the East European Platform are described from the...
Newly collected and restudied earlier materials on an enigmatic fish Ventalepis ketleriensis Schultze, 1980 from the upper Famennian (postera - ? Lower expansa conodont zones) of Latvia and central and northwestern Russia support its porolepiform affinities. A new family Ventalepididae fam. nova is established for this genus upon a peculiar combina...
The village of Stolbovo, western Russia, has previously yielded a dipnoan fauna comprising the long-snouted form ' Rhinodipterus ' stolbovi , but also a three-dimensionally preserved otoccipital region of a skull previously identified as the osteolepiform ‘ Latvius ’ obrutus . This identification was made from the density of lateral line canal pore...
The village of Stolbovo, western Russia, has previously yielded a dipnoan fauna comprising the long-snouted form ' Rhinodipterus ' stolbovi , but also a three-dimensionally preserved otoccipital region of a skull previously identified as the osteolepiform ‘ Latvius ’ obrutus . This identification was made from the density of lateral line canal pore...
The recent find of an ethmosphenoid of Glyptopomus bystrowi (Gross 1941), a “glyptopomid” tetrapodomorph, in the Ketleri Formation (Upper Famennian, Upper Devonian) in western Latvia induced the description of historical material from this site and almost coeval localities in Central Russia (Orel-Saburovo Beds, Plavskian Regional Stage). Detailed m...
A huge dipnoan, Permoceratodus gentilis Krupina, gen. et sp. nov. (order Ceratodontiformes), from the terminal Permian beds (Zhukovian Regional Stage, Vyatkian Stage, Upper Permian) of the Sokovka locality (Vladimir Region) is described. It is characterized by the evolutionarily advanced high extent of fusion of skull roof bones and conservative we...
Species composition of the genus Obruchevichthys Vorobyeva, 1977, previously based on two specimens from the Upper Frasnian (Upper Devonian) of Latvia and Leningrad Region of Russia is revised. The precise locality of the latter specimen was considered by the author of this taxon as unknown. Archives recently found in collection and field research...
Chondrichthyan fish remains reported from the Permian (Kazanian) deposits of the Chiosha Bay, and the lower course of the Nadtey River of the Kanin Peninsula (Nenets Autonomous District, Arkhangelsk Region, Russia) include dental elements and scales belonging to Stethacanthus cf. S. altonensis (St. John et Worthen, 1875), Symmoriiformes gen. indet....
Primary radiation of dental system types led to formation of two basic patterns of dental elements arrangement: transversely spiral, realized in cartilaginous fishes and early acanthodians, as well as linear-areal, known in some acanthodians, bony fish and tetrapods. The linear-areal dental system was based upon palate-quadrate and Meckelian cartil...
Background
The pituitary gland is formed by the juxtaposition of two tissues: neuroectoderm arising from the basal diencephalon, and oral epithelium, which invaginates towards the central nervous system from the roof of the mouth. The oral invagination that reaches the brain from the mouth is referred to as Rathke’s pouch, with the tip forming the...
The localities to be demonstrated during the field trip are situated at the Lemovzha, Saba
and Oredezh rivers (Fig. 2). The studied sections comprise the Middle Devonian Narova
Regional Stage (Eifelian), Aruküla and Gauja Regional Stages (Givetian), and possibly the
Upper Devonian, Frasnian Amata Regional Stage. The agnathan and fish remains occur...
Late Devonian vertebrate communities within the Baltica zoogeographical Province are analysed for intra- and interprovincial connections. Components within the category of provincial endemics are used to assign the communities to a particular zoogeographical province. Marine and continental, presumably freshwater types of vertebrate dispersal are o...
The spectrum of proposed endemic-cosmopolitan (E-C) categories is applied to demonstrate faunal interchange between palaeozoogeographic provinces during the Givetian-Famennian, on the assumption that the E-C proportion reflects the isolation rate of the fauna. Mostly endemic groups are useful to establish zoogeographical regionalisation, whereas po...
Middle Devonian vertebrate communities within the Baltica palaeozoogeographical Province are analysed for intra-and interprovincial con-nections. Components within the category of provincial endemics are used to assign each community to a particular zoogeographical province. Two types of vertebrate dispersal are outlined: (1) normal marine and (2)...
Study of lifetime bite traces on agnathans and fish (or gnathostomes) from Ukraine, Estonia, Latvia and north-western and central European Russia reveals evidence of predator–prey relationships in communities of Devonian age. Numerous bite traces on skeletal parts of agnathan pteraspidiforms and psammosteiforms, placoderm arthrodires and antiarchs...
Traces of parasite action have been discovered in the Middle-Upper Devonian fish from Estonia, Latvia and European Russia. Such traces are known in heterostracan Psammolepis venyukovi, antiarchs Asterolepis radiata and Bothriolepis ciecere, sarcopterygians Holoptychius sp., Ventalepis ketleriensis and Eusthenodon sp. nov. The traces include evidenc...
Abstract Lebedev, O.A. 2009. A new specimen of Helicoprion Karpinsky, 1899 from Kazakhstanian Cisurals and a new reconstruction of its tooth whorl position and function. —Acta Zoologica (Stockholm) 90 (Suppl. 1): 171–182 A new Helicoprion bessonowi Karpinsky, 1899 (Chondrichthyes, Eugeneodontiformes) specimen from the Artinskian of Kazakhstan is de...
Traces of parasite action have been discovered in the Middle-Upper Devonian fish from Estonia, Latvia and European Russia. Such traces are known in heterostracan Psammolepis venyukovi, antiarchs Asterolepis radiata and Bothriolepis ciecere, sarcopterygians Holoptychius sp., Ventalepis ketleriensis and Eusthenodon sp. nov. The traces include evidenc...
Paired fin spine of presumably gyracanthid morphology with "Ctenacanthus"-like ornamentation from the Lower Carboniferous of Urals, Russia.
The teeth of a well known late Palaeozoic cladodont chondrichthyan, "Cladodus" occidentalis from Russia, USA, and England are restudied and a new generic name, Glikmanius gen. nov., is proposed for this species. Yet another tooth-based species, formerly described as ?Symmorium myachkovensis, occurring on the Russian Platform and in Nebraska, is con...
Skeletal remains of the earliest tetrapod Jakubsonia livnensis gen. et sp. nov. are described fromthe Lower Famennian, Upper Devonian of the Gornostayevka quarry (SW of the Livny Town,Oryol Region, Russia). A part of the skull roof, incomplete angular, the right cleithrum withscapulocoracoid and partial femur are described. The new genus demonstrat...
Stratigraphic distributions of Late Devonian vertebrate taxa from four East European Platform regions: The Main Devonian Field, Timan-Pechora Province, Belarus, and the Central Devonian Field, are presented. Traditional stratigraphic subdivisions of these regions are provisionally correlated with the placoderm-based vertebrate zonation of the Main...
This paper deals with the fossil contents and correlation of the Domodedovo and Las Llacerias sections, two Carboniferous carbonate successions situated in the Moscow Basin and the Cantabrian Mountains, respectively. The stratigraphic interval analysed in both sections embraces the uppermost Moscovian and the lower Kasimovian. This is the interval...
New fish material, including microremains from the Tournaisian-Viséan interval of the Moscow Syneclise, Northern Urals and Voronezh Anteclise of the East European Platform, comprises new species of Chondrichthyes: Lissodus pectinatus sp. nov., (?) Diplodoselache antiqua sp. nov., Eunemacanthus krapivnensis sp. nov. Other fish taxa include Stethacan...
The middle Famennian vertebrate localities of Central Russia yielded new micro- and macroremains of the chondrichthyansTuberospina nataliae nov. gen. et sp. and Symmorium sp.; struniiforms Strunius cf. rolandi Gross and Pycnacanthus fischeri nov. sp.; porolepiform ?Glyptolepis dellei Gross. The osteolepiform taxa Cryptolepis grossi Vorobyeva and ?G...
Postcranial remains of the Russian Late Devonian tetrapod Tulerpeton include the hexadactylous fore limb, hind limb, anocleithral pectoral girdle, squamation, and associated disarticulated postcranial bones. A cladistic analysis indicates that Tulerpeton is a reptiliomorph stem-group amniote and the earliest known crown-group tetrapod: Acanthostega...
Postcranial remains of the Russian Late Devonian tetrapod Tulerpeton include the hexadactylous fore limb, hind limb, anocleithral pectoral girdle, squamation, and associated disarticulated postcranial bones. A cladistic analysis indicates that Tulerpeton is a reptiliomorph stem‐group amniote and the earliest known crown‐group tetrapod: Acanthostega...
The morphology of a new Devonian osteolepidid fish, Medoevia lata n. g., n. sp. is described. The specimen originates from an unknown locality, and dating was made on the basis of a tooth of Phoebodus australiensis Long, morphotype 1 (Ginter, 1990), found during the chemical preparation. This suggests an age ranging from the lower P. trachytera to...
The find of the earliest tetrapod Tulerpeton curtum Lebedev in the unique Andreyevka-2 vertebrate locality (close to Andreyevka village, Tula Region, Central Russia) made the establishment of the precise age of the fossiliferous deposits of this and the neighbouring sites most important. The dating was carried out with the help of the ostracod and...
An original attempt to define the bones composing the manus in the Upper Devonian (Famennian)
tetrapod , Tulerpeton curtum (Tula Region, Russia) was fruitless when compared to the "standard
anthracosaur" pattern (as seen in the Archeria) because of the supernumerary finger VI and the
hardly determinable distal carpal elements. An alternative approa...
Ventastega curonica, from the Upper Famennian Ketleri Formation, is the
first tetrapod find from the Upper Devonian of Latvia, and only the
fourth adequately represented Devonian tetrapod genus to be described.
The taxon is represented by disarticulated cranial and postcranial
elements from two localities, Ketleri on the Venta River and Pavari on
t...
... investi- gated. The level of the Devonian -Carboniferous boundary on the Russian platform was changed recently, the Ozerki- Khovanshchina regional stage being included in the Devonian as the topmost unit. Accordingly the ...
Devonian tetrapod remains have been recovered from the Famennian of Russia. They occurred in a limestone with stromatolites, algae, numerous and diverse fish remains and the holotype of the tetrapod Tulerpeton curtum. The conditions indicate a shallow-water basin with carbonate-rich water and perhaps an estuarine or marine situation. The individual...
Two new osteolepidid lobe-finned fishes are described: Geptolepis donensis gen. et sp. nov. from the Frasnian deposits of the Central Devonian field and Greiserolepis tulensis sp. nov. from the Malevkian deposits of the southern part of the Moscow syneclise. Due to the underossification of the endocranial structures in Geptolepis donensis, the sutu...
A description of a new genus and species of a Glyptopominae (Osteolepiformes) Peregrinia krasnovi from the Devonian of the Arkhangelsk Region of Russia
