| oxyuricassis coronatus n. gen. n. sp. and o. hexaspinatus n. sp. (oxyurida: pharyngodonidae): parasites of lasiancistrus saetiger (siluriformes: loricariidae) in freshwater rivers of the brazilian amazon. | a new nematode genus is described from intestines of lasiancistrus saetiger ambruster from freshwater rivers in the brazilian amazon. oxyuricassis n. gen. is characterized by a cephalic cone, small buccal cavity, long esophagus with a well-developed isthmus, and a conical tail with spines. two new species are described: oxyuricassis coronatus n. sp. is characterized by the absence of lateral alae, a conical tail with truncated extremity with spine-like sclerotized projections around the tail tip ... | 2017 | 28431211 |