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146 ADVANCES IN PALAEOICHTHYOLOGY Märss T., Fredholm D., Talimaa V., Turner S., Jeppsson L., Nowlan G. 1996. Towards the Silurian Vertebrate Biozonal Standard. – In: The James Hall Symposium - Second International Symposium on the Silurian System. Program and Abstracts: 73-74. University of Rochester. Miller C.G., Märss T. 1999. A conodont, thelodont and acanthodian fauna from the Lower Prídolí (Silurian) of the Much Wenlock area, Shropshire. – Palaeontology, 42 (4): 691-714. Pander Ch. 1856. Monographie der fossilen Fische des silurischen Systems der Russisch- Baltischen Gouvernements. Akademie der Wissenschaften. St. Petersburg. 37-91. Rohon J.V. 1893. Die obersilurischen Fische von Oesel. II. Teil. – Mémoires Academie des Sciences, 7, 41 (5): 1-124. St. Petersbourg. Ulst R.Ž. 1974. On the boundaries of the Upper Silurian in Latvia. – In: V.S. Sorokin (ed.), Regional Geology of the Baltic. Riga, Zinatne. 38-44 (in Russian). Ulst R.Ž., Gailite L.K. 1986. Facial zonation and the local stratigraphic units of the Upper Silurian in Latvia. – In: A.P. Brangulis (ed.), Biofacies and fauna of the Silurian and Devonian basins of the Baltic. Riga, Zinatne. 3-12 (in Russian). Valiukevicius J. 1998. Acanthodians and zonal stratigraphy of the Lower and Middle Devonian in East Baltic and Byelorussia. – Palaeontographica, A. 248: 1-53+17 plates. Valiukevicius J. 2003 a. Devonian acanthodians from Severnaya Zemlya Archipelago (Russia). – Geodiversitas, 25 (1): 131-204. Valiukevicius J. 2003 b. New Silurian nostolepids (Acanthodii, Pisces) of Lithuania. –Geologija, 42: 51-68. Vilnius. Valiukevicius J. 2003 c. Silurian acanthodian succession of the Lužni-4 borehole (Latvia). – In: H.-P. Schultze, E. Lukševics & D. Unwin (eds), The Gross symposium 2: Advances of Palaeoichthyology. Ichthyolith Issues, Special Publication, 7: 51. Valiukevicius J. 2003 d. New Late Silurian to Middle Devonian acanthodians of Timan-Pechora region. – Acta Geologica Polonica, 53 (3): 209-245. Valiukevicius J. 2004. New Wenlock-Pridoli acanthodian fishes from Lithuania. – Acta Palaeontologica Polonica, 49 (1): 147-160. Vergoossen J.M.J. 1997. Revision of poracanthodid acanthodians. – In: A. Ivanov, M.V.H. Wilson & A. Zhuravlev (eds), Palaeozoic strata and fossils of the Eurasian Arctic. Ichthyolith Issues, Special Publication, 3: 44-46. Vergoossen J.M.J. 1999 a. Siluro-Devonian microfossils of Acanthodii and Chondrichthyes (Pisces) from the Welsh Borderland/South Wales. – Modern Geology, 24: 23-90. Vergoossen J.M.J. 1999 b. Late Silurian fish microfossils from Helvetesgraven, Skåne (southern Sweden) (I). – Geologie en Mijnbouw, 78: 267-280. Vergoossen J.M.J. 1999 c. Late Silurian fish microfossils from an East Baltic-derived erratic from Oosterhaule, with a description of new acanthodian taxa. – Geologie en Mijnbouw, 78: 231-251. Vergoossen J.M.J. 2000. Acanthodian and chondrichthyan microremains in the Siluro-Devonian of the Welsh Borderland, Great Britain, and their biostratigraphical potential. – In: A. Blieck & S. Turner (eds), Palaeozoic Vertebrate Biochronology and Global Marine/Non-Marine Correlation. Courier Forschungsinstitut Senckenberg, 223: 175-199. Vergoossen J.M.J. 2002 a. Late Silurian fish microfossils from Ramsåsa, locality H, Scania, south Sweden,with some remarks on the body zonation scheme used in thelodont studies. – Scripta Geologica, 123: 41-69. Vergoossen J.M.J. 2002 b. Late Silurian fish microfossils from Klinta and Rinnebäks Bro (Scania, south Sweden), with remarks on the morphology of Nostolepis striata trunk scales. – Scripta Geologica, 123: 71-92. Vergoossen J.M.J. 2002 c. Late Silurian fish microfossils from Ramsåsa (sites D and ‘south of church’), Skåne, south Sweden. – Scripta Geologica, 123: 93-158.
J. Valiukevičius. Silurian acanthodians from Lūžņi-4 147 Vieth J. 1980. Thelodontier-, Acanthodier- und Elasmobranchier-Schuppen aus dem Unter-Devon der Kanadischen Arktis (Agnatha, Pisces). – Göttinger Arbeiten zur Geologie und Paläontologie, 23: 1-69. Woodward A.S. 1891. Catalogue of the fossil fishes in the British Museum (Natural History), Part II: XLIV+1-567. Trustees of the British Museum (Natural History), London. Silūra akantožu kompleksi no urbuma Lūžņi-4 (Latvija) JUOZAS VAĻUKEVIČS Urbumā Lūžņi-4 atrastās akantodes aptver apmēram 50 sugas un dermālo elementu formas, kuras izplatītas no Ludlovas apakšdaļas līdz Pršidolas nodaļas pašai augšai. Raksturoti 11 akantožu kompleksi, kas klasificēti kā vadfosīliju izplatības intervāli (=daļējas izplatības intervāli). Parādīti to taksonu izplatības intervāli, kuri ir raksturīgi vietējām un reģionālajām stratigrāfiskām vienībām, izdalītas nozīmīgākās sugas. Pirmā Nostolepis gracilis parādīšanās Baltijas griezumā atzīmēta vēlajā Ludlovas epohā, agrākā laikā nekā bijis zināms iepriekš. Dažiem taksoniem, tādiem kā Nostolepis latvica sp. nov., N. alifera sp. nov., N. cf. linleyensis, Rohonilepis breviornatus, Arenaceacanthus arcuatacanalis, Fecundosquama basiglobosa, Poracanthodes marssae sp. nov., ir liels potenciāls biozonēšanā, bet Nostolepis linleyensis, Gomphonchus mediocostatus, Monospina erecta, Poracanthodes spp., ir vērtīgi plašām reģionālām korelācijām. Īsmūžīgos akantožu kompleksos no Lūžņi-4 urbuma Pršidolas augšējās daļas trūkst dažu taksonu, kas raksturīgi dziļākā baseina Jūras svītai no Lietuvas dienvidrietumu daļas. Iespējams, tas norāda uz nepilnīgu griezumu šajā baseina daļā.
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LATVIJAS UNIVERSITĀTES RAKSTI 679.
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LATVIJAS UNIVERSITĀTES RAKSTI 679.
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Contents Ervīns Lukševičs and Ģ
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ACTA UNIVERSITATIS LATVIENSIS, 2004
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Ervīns Lukševičs, Ģirts Stinkul
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Olga Afanassieva. Microrelief on th
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Page 159 and 160: Ž. Žigaite. New telodont from Tuv
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