Investigations of the validity of species status of ixodes didelphidis (Acari: ixodidae) - Labruna, Marcelo Bahia; Marrelli, Mauro Toledo; Heinemann, Marcos Bryan; Richtzenhain, Leonardo José; Cortez, Adriana; Marinotti, Osvaldo; Schumaker, Teresinha Tizu Sato (International Congress of Entomology, 2000)