NORs pattern in four species of brazilian harvestmen: Goniosoma spelaeum, Gonyleptes curticornis, Ilhaia cuspidata e Progonyleptoidellus striatus (Opiliones, Laniatores, Gonyleptidae) - Oliveira, Rosangela Martins de; Cella, Doralice Maria; Gnaspini, Pedro; Pinto da Rocha, Ricardo (Congress of the Brazilian Society for Cell Biology, 2004)