Radiolaria Polycystina
Acknowledgments

Thanks are due to the many colleagues and publishers which kindly allowed using their published and unpublished illustrations for this work, and especially to Neil Swanberg, Petrus van de Paverd, Amy Weinheimer and Cathy Nigrini for providing several of the photographs included. Critical reviews by Stanley Kling, Cathy Nigrini, Annika Sanfilippo and Amy Weinheimer, as well as comments by Roger Anderson, William Riedel and Luis O'Dogherty, were helpful for improving earlier vesions of the manuscript. This work was partly financed by grants from the University of Buenos Aires (UBA EX-040), and from the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET PID-BID 0366).