An imported white-lipped island pitviper, Trimeresurus insularis, originally collected from Wetar Island, Indonesia and held in quarantine and housed at the Dallas Zoo, U.S.A., unexpectedly died and was examined for gastrointestinal helminths. The pitviper harbored 6 female ascarid nematodes identified as Polydelphis anoura Dujardin, 1845. This snake is rarely examined and herein we report only the second record of any parasite from this host as well as a new distributional record for P. anoura.