Abstract
During the investigation of the nematodes of birds in district Matiari, Sindh, Pakistan, three specimens of the genus Pseudopsilostoma Yamaguti, 1958, were collected from the intestine of Cattle egret (Bubulcus ibis Linn., 1958). The specimens were studied and identified as Pseudopsilostoma oderolalensis new species on the basis of shape of the body, position of ventral sucker, pharynx, cirrus pouch, seminal vesicle, position of ovary and testes, egg size and the most important position of vitellarium which are strongly developed in lateral margins from the acetabulum to the posterior end, confluent behind the testis. The genus is being retained on the position of the vitellarium.
