12 ADVANCES IN PALAEOICHTHYOLOGY The oral <strong>and</strong> 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 <strong>and</strong> Cenozoic fish study results. Emphasis was put on morphology, aspects of evolution, biogeography <strong>and</strong> stratigraphic importance of chondrichthyans, sarcopterygians <strong>and</strong> tetrapods, thelodonts, <strong>and</strong> placoderms. Some presentations were focused on stratigraphic importance of the vertebrate assemblages, as well as on biostratigraphic subdivision of the Silurian <strong>and</strong> Devonian. Several workshops took place during the symposium, <strong>and</strong> researchers of sarcopterygians <strong>and</strong> 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 <strong>and</strong> to promote studies of their palaeoecology <strong>and</strong> palaeogeography. 27 oral presentations <strong>and</strong> 32 posters clearly showed that authority of W. Gross has not been decreased after his passing away, but his highly put st<strong>and</strong>ards on description of the vertebrate microfossils will have an effect on the micropalaeontology <strong>and</strong> 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 <strong>and</strong> 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 <strong>and</strong> their neighbouring co<strong>un</strong>tries. Acknowledgements. – We are very grateful to the University of Latvia for financial support <strong>and</strong> opport<strong>un</strong>ity 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, <strong>and</strong> 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 amo<strong>un</strong>t of work <strong>and</strong> 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, Alex<strong>and</strong>er Ivanov, Phylipp Janvier, Valentina Karatajūte-Talimaa, Tiiu Märss, Ģirts Stinkulis, Susan Turner, Mark V.H. Wilson, Gavin C. Yo<strong>un</strong>g. Literatura Gross W. 1931. Asterolepis ornata Eichw. <strong>un</strong>d 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 <strong>un</strong>d Placodermen aus Heterostius-schichten Estl<strong>and</strong>s <strong>un</strong>d Lettl<strong>and</strong>s. Ann. Soc. Reb. Natur. Invest. Univer. Tartu, Bd. 46: 1-89. Gross W. 1941. Die Bothriolepis-arten der Cellulosa-mergel Lettl<strong>and</strong>s. K<strong>un</strong>gl. Svenska Vetenskaps-akademiens H<strong>and</strong>lingar, 19 (5): 1-79. Gross W. 1974. Kirchspiel <strong>un</strong> pastorat Roop in Südlivl<strong>and</strong> 1907-1917. W. Gross, Tübingen. 61 S. Lukševičs E. 2002. Valteram Grosam – 100. Dabas <strong>un</strong> 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. Yo<strong>un</strong>g; 26, R. Wade; 27, E. Sharp; 28, E. Kurik; 29, H. Botella; 30, P. Beznosov; 31, S. Yo<strong>un</strong>g; 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. D<strong>un</strong>can; 42, M. Friedman; 43, E. Daeschler; 44, A. Ivanov. Photo by O. Lebedev.
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