| paraorientatractis semiannulata n. g., n. sp. (cosmocercoidea: atractidae) from the large intestine of the side-necked turtle, podocnemis unifilis troschel, 1848 (testudines: pelomedusidae) in brazil. | specimens collected from the large intestine of the side-necked turtle podocnemis unifilis troschel, 1848 in the region of cuminá and trombetas rivers near pará, brazil are assigned to a new genus and new species of the nematode superfamily cosmocercoidea and family atractidae and named paraorientatractis semiannulata. the new genus is separated from the nearest genus orientatractis by the funnel-shaped mouth opening, the presence of 4 distinct lips, 4 papillae in the internal cycle, one on each ... | 1997 | 9332602 |