Dioctowittus hughjonesi sp. n. (Nematoda: Cystoopsidae) from Liasis fuscus (Peters, 1873) (Serpentes: Boidae) from the Northern Territory and Morelia amethistina (Schneider, 1802) from Queensland, Australia

Dioctowittus hughjonesi sp n. (Nematoda: Cystoopsidae) is described from the peritoneal cavity of Liasis fuscus (Peters, 1873) from the Adelaide River floodplain, Northern Territory and from Morelia amethistina (Schneider, 1801) from Cape York Peninsula, Queensland. Dioctowittus hughjonesi is distinguished from others members of the genus by the presence of lateral lobes at both anterior and posterior ends, size of worms, size of eggs and presence of paired ventral papillae in males. The genus Dioctowittus is found only in tropical regions with high seasonal rainfall. A possible link in the life cycle between aquatic intermediate hosts and the presence of polar filaments in the egg remains problematic, requiring further study.