Conica trilobata n.gen.,n.sp. (Trematoda: Hemiuridae: Dinurinae) from the fish,otolithus argenteus,of Karachi coast

A trematode conic triobafta n. gen . n.sp.,with unique characters not previously known in family hemiridae is describe here from the instestime of the fish agrenteus of karachi coast. this trematode is characterized by having the oral sucker covered with a large cone,a trilobed subtertninl oral sucker,cecae long,reaching posteriorly almost to the tail end,acetabulum four to five times larger than oral sucker,prominent pharynx and esophagus. testes are two a little behind acetabuium postequatorial symmetrical,rounded,seminal vesicle elongate,preacteabular and far anterior to it,cirrus sac is also elongate,concave ventrally and convex dorsally,internal structure not differentiated,pars prostatica not visible,genital pore post and lateral to overy. votelleria consist of 7 long tubes,posterior to ovary. uterus slightly extending into tail. eggs numerous,elongate. copyright 2011 zoological society of pakistan.