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12 ADVANCES IN PALAEOICHTHYOLOGY The oral and poster presentations were, already traditionally, focused on the early vertebrates, mostly from the Silurian to Carboniferous, but some presentations touched also the Ordovician, Permian, Mesozoic and Cenozoic fish study results. Emphasis was put on morphology, aspects of evolution, biogeography and stratigraphic importance of chondrichthyans, sarcopterygians and tetrapods, thelodonts, and placoderms. Some presentations were focused on stratigraphic importance of the vertebrate assemblages, as well as on biostratigraphic subdivision of the Silurian and Devonian. Several workshops took place during the symposium, and researchers of sarcopterygians and tetrapods established a new research group to coordinate studies of these organisms particularly important in evolution of vertebrates, to find out fish-tetrapod relation links and to promote studies of their palaeoecology and palaeogeography. 27 oral presentations and 32 posters clearly showed that authority of W. Gross has not been decreased after his passing away, but his highly put standards on description of the vertebrate microfossils will have an effect on the micropalaeontology and palaeoichthyology for long time. This volume of Acta Universitatis Latviensis comprises the papers submitted by participants of the symposium. I hope that the reader will find the papers interesting and important, because a part of them include descriptions of new taxa from insufficiently studied groups, as well as include results of continuous studies carried out in the Baltic States and their neighbouring countries. Acknowledgements. – We are very grateful to the University of Latvia for financial support and opportunity to publish these papers as a special volume of Acta Universitatis Latviensis. Large financial support was provided also by contribution of IUGS IGCP Project no. 491 (leader Dr. Zhu Min), Natural History Museum of Latvia, and meeting receipts. The meeting was made possible through organizational support from members of the Organization Committee A. Ceriņa, L. Lukševiča, E. Lukševičs, T. Märss, H.-P. Schultze, Ģ. Stinkulis, I. Upeniece, A. Zabele, I. Zupiņš. The assembly of a volume takes a large amount of work and the Guest Editor of the volume (E. L.) would like to thank the following individuals for reviewing the papers that are published here: Alain Blieck, Henning Blom, Carole Burrow, Jennifer A. Clack, Edward Daeschler, David K. Elliott, Alexander Ivanov, Phylipp Janvier, Valentina Karatajūte-Talimaa, Tiiu Märss, Ģirts Stinkulis, Susan Turner, Mark V.H. Wilson, Gavin C. Young. Literatura Gross W. 1931. Asterolepis ornata Eichw. und das Antiarchi-Problem. Palaeontographica, Bd. 75: 1-62. Gross W. 1933. Die Fische des Baltischen Devons. Palaeontographica, Bd. 79, A: 1-74. Gross W. 1940. Acanthodier und Placodermen aus Heterostius-schichten Estlands und Lettlands. Ann. Soc. Reb. Natur. Invest. Univer. Tartu, Bd. 46: 1-89. Gross W. 1941. Die Bothriolepis-arten der Cellulosa-mergel Lettlands. Kungl. Svenska Vetenskaps-akademiens Handlingar, 19 (5): 1-79. Gross W. 1974. Kirchspiel un pastorat Roop in Südlivland 1907-1917. W. Gross, Tübingen. 61 S. Lukševičs E. 2002. Valteram Grosam – 100. Dabas un Vēstures kalendārs 2003. Rīga, Zinātne. 212.-219. lpp. Schultze H.-P. 1996. Walter R. Gross, a palaeontologist in the turmoil of 20th century Europe. Modern Geology, 20: 209-233. Turner S. 1988. International Palaeozoic microvertebrate correlation programme. Ichthyolith Issues, 1: 2.
Ervīns Lukševičs, Ģirts Stinkulis. Otrais V. Grosa simpozijs 13 Fig. 1. Simpozija dalibnieki. Participants of the meeting. 1, I. Upeniece; 2, K. Bryan; 3, H.-P. Schultze; 4, E. Lukševics; 5, S. Turner; 6, Zhao Wen-Jin; 7, L. Lukševica; 8, R. Soler-Gijón; 9, Vincent Dupret; 10, C.G. Miller; 11, A. Blieck; 12, V. Karatajute-Talimaa; 13, G. Arratia; 14, J.A. Clack; 15, P. Szrek; 16, G. Zakharenko; 17, M. Ginter; 18, G. Johnson; 19, T. Märss; 20, M. Niit; 21, Ž. Žigaite; 22, Wang Nian-Zhong; 23, O. Afanassieva; 24, P.E. Ahlberg; 25, G.C. Young; 26, R. Wade; 27, E. Sharp; 28, E. Kurik; 29, H. Botella; 30, P. Beznosov; 31, S. Young; 32, D. Plaksa; 33, Z. Yurieva; 34, J. Valiukevicius; 35, I. Zupinš; 36, Ts. Tonashka; 37, H. Blom; 38, G. Clement; 39, C. Burrow; 40, C. Derycke-Khatir; 41, M. Duncan; 42, M. Friedman; 43, E. Daeschler; 44, A. Ivanov. Photo by O. Lebedev.
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