Abstract
A new hemiurid trematode Microvesicula otolithi n.gen., n.sp. is described here from the fish Otolithus argenteus of Karachi coast. This trematode is characterized by having a more or less spindle-shaped body without tail, oral sucker small, pharynx and esophagus are also small, ceca long and thick reaching to near about the posterior end, acetabulum 3 or more times larger than oral sucker, testes almost symmetrical posterior to this, seminal vesicle small, pear-shaped, genital opening posteroventral to pharynx. Ovary is beanshaped, larger and posterior to testes, seminal receptacle larger than ovary and postovarian. Vitelline tubules 7 radiating from posterior to ovary and laterally extending to the cecal and extracecal regions, situated in posterior third of the body. Uterus extending from preovarian to prebifurcal region, with numerous, small eggs.
