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I. V. Novikov 《Paleontological Journal》2012,46(4):400-411
The trematosauroid genus Benthosuchus Efremov, 1937 is revised and its diagnosis is emended. This genus includes the previously established B. sushkini, B. korobkovi, and B. bashkiricus, and the new species B. gusevae described here. The new form is archaic relative to congeners and is similar in a number of characters to the archaic capitosaurid Wetlugasaurus samarensis, which confirms direct affinity of the two genera. 相似文献
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DUBININA MN 《Zoologicheski? zhurnal》1950,19(5):417-426
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A. A. Kurkin 《Paleontological Journal》2012,46(2):187-198
Dicynodontids are the most widespread and diverse group of higher anomodonts in the Late Permian of Eastern Europe. Dicynodon trautscholdi Amalitzky, 1922 is the first dicynodont described in Russia (Amalitzky, 1922). The taxonomic position of this and several
closely related forms described by V. P. Amalitzky and P. P. Sushkin (Sushkin, 1926) remains an open question. A reexamination
of cranial morphological features in East European members of the family Dicynodontidae allows the assignment of Dicynodon trautscholdi to a new genus, Fortunodon gen. nov., and corroborates the isolated position of Dicynodon amalitzkii established by Sushkin (1926), which is also assigned to the genus Fortunodon gen. nov. Beginning from the Sokolki Assemblage, Late Permian dicynodontids adapted to various ecological niches and had
a noticeable effect on the general appearance of the tetrapod fauna. 相似文献
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I. V. Novikov 《Paleontological Journal》2010,44(4):457-467
The cranial morphology of a new species of the genus of Trematosaurus, T. galae sp. nov., represented by fragmentary specimens from the Lower Triassic Donskaya Luka locality (Volgograd Region), is described
in detail. The diagnosis of the genus Trematosaurus is amended. 相似文献
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L. A. Viskova 《Paleontological Journal》2009,43(5):543-549
The radiation of the Jurassic bryozoans of the class Stenolaemata, which started in seas of the Bajocian and Bathonian of western Europe, is shown to be continued in basins of eastern Europe during the extensive Middle Callovian transgression. The taxonomic composition of stenolaemate bryozoans from the Jurassic of central European Russia and main features of their colonial morphology are discussed. 相似文献
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HEYO VAN ITEN ROBT S. COX ROYAL H. MAPES 《Lethaia: An International Journal of Palaeontology and Stratigraphy》1992,25(2):135-144
Van Iten, H., Cox, R. S. & Mapes, R. H. 1992 04 15: New data on the morphology of Sphenothallus Hall: implications for its affinities. Lethaia , Vol. 25, pp. 135–144. Oslo. ISSN 0024–1164.
Recent speculation on the phylogenetic relationships of Sphenothallus Hall, 1847 has focused on two alternatives: (1) affinity with hydrozoan or scyphozoan cnidarians, or (2) affinity with annelids or other 'worms'. We have found that some species of Sphenothallus formed branching clonal colonies, and that others produced a thin transverse wall, similar to the conulariid schott. Sphenothallus tests are composed of carbonate apatite and are built of numerous, extremely thin lamellae (< 1 μm) that parallel the surface of the test. The holdfast, long interpreted as consisting of a pair of nested cups, actually consists of a single closed, broadly conical expansion floored by a thin basal membrane. Many thecate hydrozoan and scyphozoan polyps form branching clonal colonies and produce a thin transverse wall, similar to that produced by Sphenothallus . Further, thecae of coronatid scyphozoans are built of submicron-thick lamellae that parallel the outer surface of the theca, and coronatid thecae possess a closed, broadly conical apical expansion that serves as a holdfast. No such combination of characteristics exists among annelids or other non-cnidarian taxa. The recent discovery of paired tentacles in Sphenofhallus from the Early Devonian Hunsrück Slate by Fauchald et al ., thought to indicate that Sphenorhallus was wormlike, does not militate against a hypothesis of affinity with cnidarians. We therefore favour the hypothesis of a cnidarian affinity for Sphenothallus. * Sphenothallus, vermiform problematica, phylogenetic inference, coloniality, Cnidoria, Hydrozoa, Scyphozoa, Annelida, conulariids, byroniids, Bear Gulch Limestone . 相似文献
Recent speculation on the phylogenetic relationships of Sphenothallus Hall, 1847 has focused on two alternatives: (1) affinity with hydrozoan or scyphozoan cnidarians, or (2) affinity with annelids or other 'worms'. We have found that some species of Sphenothallus formed branching clonal colonies, and that others produced a thin transverse wall, similar to the conulariid schott. Sphenothallus tests are composed of carbonate apatite and are built of numerous, extremely thin lamellae (< 1 μm) that parallel the surface of the test. The holdfast, long interpreted as consisting of a pair of nested cups, actually consists of a single closed, broadly conical expansion floored by a thin basal membrane. Many thecate hydrozoan and scyphozoan polyps form branching clonal colonies and produce a thin transverse wall, similar to that produced by Sphenothallus . Further, thecae of coronatid scyphozoans are built of submicron-thick lamellae that parallel the outer surface of the theca, and coronatid thecae possess a closed, broadly conical apical expansion that serves as a holdfast. No such combination of characteristics exists among annelids or other non-cnidarian taxa. The recent discovery of paired tentacles in Sphenofhallus from the Early Devonian Hunsrück Slate by Fauchald et al ., thought to indicate that Sphenorhallus was wormlike, does not militate against a hypothesis of affinity with cnidarians. We therefore favour the hypothesis of a cnidarian affinity for Sphenothallus. * Sphenothallus, vermiform problematica, phylogenetic inference, coloniality, Cnidoria, Hydrozoa, Scyphozoa, Annelida, conulariids, byroniids, Bear Gulch Limestone . 相似文献
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A. A. Kurkin 《Paleontological Journal》2010,44(6):672-681
The data on morphology and systematics of Late Permian dicynodonts of Eastern Europe are considered. The taxonomic position
of dicynodonts and probable evolutionary trends in their development are discussed. 相似文献
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In order to assess the parasitological status in imported pheasants, 51 birds (Phasianus colchicus) coming from Poland and Rumania and used in Italy in repopulation interventions for hunting purposes were examined. From each animal the trachea, oesophagus, crop and intestine were collected and examined for the presence of nematodes. The examination of the oesophagi and crops of 5 birds revealed the presence of parasites pertaining to the family Capillariidae: Eucoleus contortus was found in all of the 5 animals, E. annulatus was present along with the previous parasite in one animal coming from Poland. The examination of the tracheae revealed the presence of Syngamus trachea in 5 animals (9.80%). Adult or larval stages of Heterakis gallinarum (37.25% of birds) and Capillariidae (35.29%) were found in the intestinal tracts. Aonchotheca caudinflata was detected only in one bird coming from Poland; the capillarids found in all of the remaining pheasants exhibited morphological characteristics referable to Capillaria phasianina, a species never reported in Italy. The release of game from foreign countries, therefore, may always constitute a risk for the autochthonous one due to the spread of new parasitic infections. 相似文献
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John W. Cole 《Dialectical Anthropology》1985,9(1-4):233-256
Conclusions Both party and state in each of the countries of Eastern Europe has an ideological commitment to socialism. Each is dedicated to the construction of socialist society as a means of improving the human condition. This demands improvement of the material conditions of human existence and advancement of social and personal freedom. In the context of Eastern Europe in the second half of the twentieth century this has been thought to require special attention to development of the productive forces and to the protection of the socialist states from the threat of capitalism. (In 1985 this particular threat largely comes from outside.) Within Eastern Europe there are different strategies for the construction of socialism. The Yugoslav commitment to self-governing socialism combined with participation in European capitalism and Albanian Maoist inspired autarchy mark the limits of these differences, but within the CMEA countries there are striking differences as well.Among the people of Eastern European countries there is widespread commitment to the ideals of socialism. The experiences of their presocialist past, coupled with forty years of socialization to socialist norms, have left them committed to egalitarian economic, political and social relations and to socialism as the process to pursue these goals. However, in 1985, improvements over the conditions of the past are largely taken for granted. People are bored, even irritated, by repeated celebration of how far their particular country has come since 1938 or 1944. For those living under actually existing socialism today the significant referents are to what is possible under mature socialism and to how people are living under capitalism in Western Europe and North America.Critical scholarship, as it has developed in Eastern Europe, is dedicated to a critique of actually existing socialism, to open discussion of what is possible, of the reasons for the difference between the two, and the means necessary to effect change. Central to the critical understanding of Eastern Europe is the role played by the development and reproduction of social stratification. This is defined by the formation of a social class, or strata, of managers and technocrats — the New Class. Having established a bureaucratic structure to build socialism in the name of all working people, this class has now appropriated the structure in pursuit of its own interests.The fundamental contradictions of actually existing socialism grow out of the commitment of the people to socialism and the manipulation of state and party to promote the interests of the New Class. The result has been an economistic interpretation of socialism. While the promotion of economic development was once subordinated to the twin goals of the defense of socialism and the elimination of want and privation, it has now become an end in itself, a means to the consolidation and reproduction of class privilege. The New Class claims its privilege and power as just rewards for its leadership in building socialism, but to the extent that the gap grows between the wealth and power of the New Class and other segments of the population, and to the extent that individuals use their bureaucratic positions for personal gain, discontent and demands for reform mount among the people.The New Class has addressed discontent and demands for reform largely by defending its class interests. While discouraging or even repressing critical inquiry and political efforts at reform, the New Class also allocates material rewards and personal freedoms to segments of the population which become troublesome, or which it fears might become troublesome. Critical analysis which reveals the class nature of actually existing socialism is countered with an ideology of a single class working in unison, where differences in reward and power are only temporary and necessary to construct socialism. Criticism and political organizing outside of party or state channels are defined as chauvinistic, as anti-party and state and detrimental to the construction of socialism.These internal struggles have, of course, taken place in an international context. Each movement and attempt at reform has been observed and analyzed in neighboring socialist countries so that the experience of each carries lessons for all. The Soviet Union, in opposing these movements, has demonstrated its own unwillingness to accept prevailing contradictions and continues to confuse between the agenda of the Soviet state and the nature of socialism. Meanwhile, the United States government, with the often ambivalent agreement of its West European allies, interprets any conflict in Eastern Europe as an expression of yearnings for the freedom of democratic capitalism.In spite of state and party opposition, demands for reform have continually emerged in Eastern Europe. While the struggle has been pandemic, its most visible and dramatic expressions have been in East Germany in 1953, in Hungary and Poland in 1956, in Czechoslovakia in 1968 and in Poland in 1980–81. The scholarship which has accompanied these struggles is of course dominated by critical East European intellectuals. Western scholars, including anthropologists, have also entered into this socialist discourse. In particular anthropologists have focused on the details of social relationships and ritual. They have examined the workings of the bureaucracy, the dynamics of familial relations and social networks, and the interrelationships between these. Nevertheless, no matter how distinctive and penetrating the analyses of anthropologists and other critical Western scholars, the burden of developing understanding will remain with the people who are engaged in the contradictions of life under actually existing socialism.The principal significance of anthropological understanding of socialism in Eastern Europe will be in the United States itself. Since the origins of institutional anthropology in the nineteenth century, critical anthropologists have promised to use their insight into social and cultural practice in other parts of the world as the basis for a critique of their own society and culture. Anthropologists can honor this promise by using their understanding of socialist practice to contribute to the dynamic and transformative examination of capitalism.Most relevantly, in this axial moment when all of human life and culture is threatened, anthropologists must offer their knowledge and experience as the basis for the demystification of Cold War perspectives on Eastern Europe, and the policies attendant upon it.John W. Cole is at the University of Massachusetts, Amherst. 相似文献
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V. I. Poletaev 《Paleontological Journal》2006,40(5):507-517
In a revision of previously published materials, two new spiriferid species from the Late Tournaisian, Unispirifer subtornacensis sp. nov. and Mesochorispira ussuilensis sp. nov., and Atylephorus nalivkini sp. nov. from the Lytva Horizon of the Upper Devonian of Bashkiria are described. Based on the original collection, a new Serpukhovian subspecies, Podtsheremia duplicicosta triplicicosta, from the southern Ural Mountains and a new Late Carboniferous species, Purdonella kalashnikovi, from the polar Ural Mountains and adjacent islands are established. 相似文献
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N. V. Novozhilova 《Paleontological Journal》2010,44(2):120-124
Phosphatic structures are discovered in the tube interior of the hyolithelminth species Hyolithellus vitricus from the Lower Cambrian of the Siberian Platform. Anatomic interpretation of these structures suggests that these small-sized shelly fossils represent the earliest worm-shaped organisms probably closely related to modern Nemathelminthes. 相似文献
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Abstract Rectal body temperatures (BTs) of tuataras (Sphenodon punctatus) and of endemic, ovoviviparous gekkonid lizards—mainly Hoplodactylus maculatus (=H. pacificus) and Heteropholis manukanus—were taken together with ambient temperatures during early summer 1970 in areas of central New Zealand. The results, combined with earlier data, enable a number of conclusions to be drawn. (a) The preferred body temperature of heliotherm reptiles is best deduced from the mode of rectal BTS taken in the field, but that of non-heliotherms, when unimodal, from the median or mean. (b) Among Gekkonoidea, specific thermal relations are highly variable in several ways. (c) Sphenodon foraged on cool nights at BTs of 10.5–12.5°c, yet basked in the forest by day at BTs up to 24°c; in pasture it apparently basks within the burrow entrance. (d) Similarly, H. maculatus foraged at night at BTs of 10–13°c, but by day thermoregulated at BTs up to 33°c by ‘indirect basking’ (under thin cover) or ‘protected basking’ (in crevices penetrated by solar radiation). The average BT of females was 2°c higher than that of males, presumably because many females were gravid. (e) H. manukanus is (tertiarily) diurnal, and thermoregulated by basking up to a BT of 31 °c. Towards evening it apparently cooled down voluntarily. (f) Whereas a high daytime BT probably assists digestion in nocturnal foragers, a voluntary low night-time BT in diurnal reptiles may help to conserve energy. 相似文献
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The shape of the nucleus of blood heterophils was examined in 67 reptilian species. Two distinct forms of nucleus were found, either unlobed or lobed. In all species of Chelonia, Crocodylia and Serpentes examined the heterophil nucleus was unlobed whereas, in the Lacertilia, unlobed nuclei were found in the anguinomorph families Anguidae, Helodermatidae and Varanidae but lobed nuclei occurred in the heterophils of the scincomorph families Scincidae, Cordylida, Teiidae and Lacertidae and in the more primitive lacertilian families Iguanidae, Agamidae, Gekkonidae and Chamaeleonidae. These differences have been related to possible phylogenetic, morphological and haematological factors. 相似文献
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M. F. Ivakhnenko 《Paleontological Journal》2012,46(2):199-207
A collection of Cynodontia from the Permian of Eastern Europe is revised. The taxonomic position of a number of previously
described forms is reconsidered. New taxa, Novocynodon kutorgai gen. et sp. nov. (Thrinaxodontidae) from the Middle Permian and Sludica bulanovi gen. et sp. nov. (Procynosuchidae) from the Upper Permian, are described. 相似文献