Helminth fauna of two cyprinid fish (Campostoma ornatum and Codoma ornata) from the upper Piaxtla River, Northwestern Mexico - Aguilar-Aguilar R.; Rosas-Valdez R.; Martínez-Aquino A.; Pérez-rodríguez R.; Domínguez-Domínguez O.; Pérez-ponce de León G. (Helminthologia, 2010)