Dipturus trachydermus (Krefft & Stehmann) Checklist of helminth parasites of threatened vertebrate species from Brazil Muniz-Pereira, Luís C. Vieira, Fabiano M. Luque, José L. Zootaxa 2009 2123 1 45 43RZ4 Palm, Walter, Schwerdtfeger & Reimer Palm, Walter, Schwerdtfeger & Reimer [151,981,151,177] Cestoda Tentaculariidae Mixonybelinia Animalia Trypanorhyncha 16 17 Platyhelminthes species beveridgei    Dipturus trachydermus(Krefft & Stehmann), stomach, spiral valve, Paraná ( Knoff et al.2002, 2004c) (CHIOC 34503 a–c).