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 FJ6 30475 [246,343,1885,1911] Elasmobranchii Rajidae Animalia Rajiformes 26 27 Chordata family    Contracaecumsp.   Gorgorhynchussp.   Mixonybelinia beveridgei Otodistomum veliporum Raphidascarissp.