1.- "Complexo" Veryhachium; acritarcos indicativos do Siluriano? ;Veryhachium "complex"; Silurian indicator species? Universidade Federal do Rio de Janeiro, Centro de Ciencias Matematicas e da Natureza; Rio de Janeiro, 2005 Ver registro 2.- A brief review of the fossil record of the Ediacaran-Cambrian transition in the area of Montes de Toledo-Guadalupe, Spain Geological Society of London; London; GBR; United Kingdom, 2007 The rise and fall of the Ediacaran biota Ver registro 3.- Abnormal acritarchs from the Llandovery/Wenlock boundary in the Amazon Basin, northern Brazil; a paleoecological case [International Geological Congress]; [location varies]; III; International, 2004 Italia 2004; 32nd international geological congress; abstracts Ver registro 4.- ABNORMAL ACRITARCHS; A TERATOLOGICAL CASE FROM THE LLANDOVERY/WENLOCK BOUNDARY IN THE AMAZON BASIN, NORTHERN BRAZIL GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 2002 GEOLOGICAL SOCIETY OF AMERICA, 2002 ANNUAL MEETING Ver registro 5.- ACRITARCH AND GRAPTOLITE BIOSTRATIGRAPHY IN THE LOWER ARENIG OF THE PERI-GONDWANA RELATED EASTERN CORDILLERA, ARGENTINA UNIVERZITA KARLOVA; PRAGUE; CZE; CZECH REPUBLIC, 1999 QUO VADIS ORDOVICIAN? 8TH INTERNATIONAL SYMPOSIUM ON THE ORDOVICIAN SYSTEM Ver registro 6.- Acritarch and prasinophyte biodiversity changes through the Late Silurian to Earliest Devonian; an overview American Association of Stratigraphic Palynologists; Dallas, TX; USA; United States, 2006 Abstracts of the proceedings of the Thirty-eighth annual meeting of the American Association of Stratigraphic Palynologists Ver registro 7.- Acritarch color; a new thermal maturity indicator American Association of Stratigraphic Palynologists; Dallas, TX; USA; United States, 2006 Abstracts of the proceedings of the Thirty-eighth annual meeting of the American Association of Stratigraphic Palynologists Ver registro 8.- Acritarchen-Assoziationen der mitteldevonischen Santa Lucia Formation (Kantabrisches Gebirge, Nordspanien) ;Acritarch associations of the Middle Devonian Santa Lucia Formation (Cantabrian Mountains, northern Spain) Universitaetsdrucke Goettingen; Gottingen; DEU; Federal Republic of Germany, 2004 Geobiologie; 74. Jahrestagung der Palaeontologischen Gesellschaft; Kurzfassungen der Vortraege und Poster ;Geobiology; 74th annual meeting of the Paleontological Society; abstracts of talks and posters Ver registro 9.- Acritarchs and prasinophytes from the Manacapuru Formation, Lower Devonian of the Amazon Basin, Brazil Geological Society of America (GSA); Boulder, CO; USA; United States, 2005 Geological Society of America, 2005 annual meeting Ver registro 10.- Acritarchs from the Trombetas Group (Silurian-Lower Devonian), Amazonas Basin, Brazil, and their relations to the Gondwana paleocontinent [International Geological Congress]; [location varies]; III; International, 2004 Italia 2004; 32nd international geological congress; abstracts Ver registro