| 481. |
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| 482. |
- Popov, Leonid E., et al.
(författare)
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Ordovician (Arenig-Caradoc) Syntrophiidine brachiopods from the East Baltic Region
- 2005
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Ingår i: Palaeontology. - : Wiley. - 0031-0239 .- 1475-4983. ; 48:4, s. 739-761
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Tidskriftsartikel (refereegranskat)abstract
- Syntrophiidine brachiopods are a rare and poorly known component of Ordovician Baltoscandian faunas. They appear in the East Baltic in the Billingenian (lower Arenig) as part of the earliest known benthic assemblages dominated by elements of the Palaeozoic Evolutionary Fauna. These faunal assemblages usually include bryozoans, ostracodes, and the earliest known porambonitoids, strophomenides and endopunctate orthides, such as Idiostrophia and Orthidium, which later became characteristic of the Whiterockian brachiopod assemblages in Laurentia, but by that time had disappeared from Baltica. The superfamily Syntrophioidea reappears in Baltoscandia in the mid Caradoc. In contrast, Porambonitoidea remained the integral part of the Baltoscandian brachiopod associations through the Ordovician. Porambonites, herein redefined on the basis of restudy of the type species P. intermedius, includes only smooth porambonitoids; taxa with the distinctive ornament of radiating rows of pits first appeared in the group in the mid Arenig. The taxa Eoporambonites gen. nov., Tetralobula peregrina sp. nov., Idiostrophia prima sp. nov. and Idiostrophia tenuicostata sp. nov. are erected.
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| 483. |
- Popov, Leonid E, et al.
(författare)
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Review of the Ordovician stratigraphy and fauna of the Anarak Region in Central Iran
- 2015
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Ingår i: Acta geologica Polonica. - : Walter de Gruyter GmbH. - 0001-5709 .- 2300-1887. ; 65:4, s. 403-435
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Forskningsöversikt (refereegranskat)abstract
- The Ordovician sedimentary succession of the Pol-e Khavand area, situated on the northern margin of the Yazd block, has important differences from those in other parts of Central Iran. It has been established that the presumably terminal Cambrian to Lower Ordovician volcano-sedimentary Polekhavand Formation, exposed in the Pol-e Khavand area, has non-conformable contact with greenschists of the Doshakh Metamorphic Complex. The succeeding, mainly siliciclastic Chahgonbad Formation contains low to moderately diverse faunal assemblages, including brachiopods, cephalopods, trilobites and tentaculitids. The Darriwilian age of the lower part of the formation is well established by the co-occurrence of brachiopod genera Camerella, Phragmorthis, Tritoechia and Yangtzeella. The associated rich cephalopod fauna is different from the Darriwilian cephalopod associations of the Alborz terrane and may show some affinity with warm water faunas of North China and South Korea. It is likely that the Mid Ordovician fauna recovered from the lower part of the Chahgonbad Formation settled in the area sometime during a warming episode in the late Darriwilian. By contrast the low diversity mid Katian brachiopod association includes only three taxa, which occur together with the trilobite Vietnamia cf. teichmulleri and abundant, but poorly preserved tentaculitids questionably assigned to the genus Costatulites. This faunal association bears clear signatures linking it to the contemporaneous cold water faunas of the Arabian, Mediterranean and North African segments of Gondwana. Four brachiopod species recovered from the Chahgonbad Formation, including Hibernodonta lakhensis, Hindella prima, Lomatorthis? multilamellosa and Yangtzeella chupananica are new to science.
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| 484. |
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| 485. |
- Popov, Leonid, et al.
(författare)
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Lingulate brachiopods from the Cambrian-Ordovician boundary beds of Utah
- 2002
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Ingår i: Journal of Paleontology. - 0022-3360 .- 1937-2337. ; 76:2, s. 211-228
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Tidskriftsartikel (refereegranskat)abstract
- Seven genera and eight species of lingulate brachiopods are described from the Cambrian-Ordovician boundary beds (Cambrooistodus minutus Conodont Subzone to Rossodus manitouensis Conodont Zone) at the Lawson Cove and Lava Dam North sections, Ibex area, Utah, USA. The fauna includes one new linguloid genus, Wahwahlingula, and four new species, Lingulella? incurvata, Zhanatella utahensis, Conotreta millardensis, and Quadrisonia? lavadamensis. Lingulate brachiopods from this interval are very poorly known from Laurentia, but the recorded fauna is very similar to that described from coeval beds at Malyi Karatau, Kazakhstan, and both areas contain Eurytreta cf. bisecta (Matthew, 1901); E. sublata Popov, 1988; ZhanatellaKoneva, 1986; SchizambonWalcott, 1889; and Wahwahlingula. Eurytreta cf. bisecta is also known from the Lower Ordovician of Avalonian Canada, Britain, and Scandinavia.
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| 486. |
- Popov, L., et al.
(författare)
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Trimerellida
- 2007
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Ingår i: Treatise on Invertebrate Paleontology. - : University of Kansas Press, Lawrence, Kansas. ; , s. 2592-2594
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Bokkapitel (refereegranskat)
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| 487. |
- Popov, Oliver, et al.
(författare)
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The Implementation of Institutional ICT Policy through the Experience of Makerere University
- 2007
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Ingår i: Proceedings. 9th International Working Conference on social implications of computers in developing countries (IFIP WG 9.4). São Paulo, Brazil. May 28-30, 2007. ; , s. 50-1
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Konferensbidrag (refereegranskat)abstract
- The aim of this paper is to give an insight to the managers of tertiary institutions from developing countries the overall essence of an institutional Information Communication Technology Policy that forester changes which are significant to national development. This paper reports live experience of institutional ICT policy that has transformed Makerere University, Uganda into a model university in the Sub-Saharan Africa. The catchment area of the university has tremendously extended as a result of smooth ICT policy implementation. The paper presents the process of policy formulation, policy statements prioritization, and solicitation of funds to implement policy statements. Finally, to give a precise implementation process experience, the paper sights live issues and challenges that where faced during implementation of one of the top priority policy statements �information access� in the institutional policy document. It highlights contributions of the information access policy statement to university processes and concludes by giving the envisioned impact of this policy statement on the entire national development.
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| 488. |
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| 489. |
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| 490. |
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