| description of two new nematode species, parasites of the mississippi paddlefish polyodon spathula (acipenseriformes: polyodontidae). | two new nematode species are described from the paddlefish polyodon spathula (walbaum) (polyodontidae, acipenseriformes) from the mississippi river drainage, united states, based on specimens previously deposited in the u.s. national parasite collection. those specimens were camallanus polyodontis n. sp. (camallanidae) from the host (site of infection not given) collected in the yellowstone river, montana in 1974 and syngnathinema chitwoodi n. sp. (daniconematidae) from the body cavity of fish c ... | 2013 | 23496761 |