Phylogenetic analyses based on small subunit rRNA and glycosomal glyceraldehyde-3- hosphate dehydrogenase genes and ultrastructural characterization of two snake trypanosomes: trypanosoma serpentis n. sp. from Pseudoboa nigra and Trypanosoma cascavelli from Crotalus durissus terrificus - Viola, Laerte Bento; Attias, Márcia; Takata, Carmen Silva de Almeida; Campaner, Marta; Souza, Wanderley de; Camargo, Erney Felício Plessman de; Teixeira, Marta Maria Geraldes (Journal of Eukaryotic Microbiology, 2009)