Posterior respiratory apparatus of Inia geoffrensis and Sotalia fluviatilis: structure and ultrastructure - Santos Júnior, Luzivaldo Castro dos; Marmontel, Miriam; Santos, Francisco Glauco de Araújo; Rici, Rose Eli Grassi; Miglino, Maria Angélica; Carvalho, Yuri Karaccas de (International Journal of Morphology, 2017)