Mini-exongene sequences define six groups within the genus Crithidia - Fernandes, O; Teixeira, Marta Maria Geraldes; Sturm, Nancy R; Sousa, M A; Camargo, Erney Felicio Plessmann de; Degrave, Wim Mauritz; Campbell, D A (Journal of Eukariotic Microbiology, 1997)