Abstract
A new hemiurid trematode Lecithocladium cybii n.sp. is described from the fish Cybium guttatum (Cybidae) of Karachi coast,
Pakistan. This new species is separted from the previously described large number of species of the genus in having a combination of
characters such as body long, soma long and wide at the level of ventral sucker, ecsoma shorter and narrower ending into a knob
posteriorly.Oral sucker terminal, transversely flattened, pharynx large, elongate, following into prominent oesophagus, the anterior
part of which is distinct, sac-like, intestinal bifurcation is much anterior to ventral sucker, ventral sucker smaller than oral sucker,
testes 2, close, diagonal, sub-globular in shape, situated almost in the middle of hind body, seminal vesicle elongate, bluntly pointed at
both ends, anterior part of which is recurved followed by long, coiled pars prostatica, sinus sac extending from the posterior level of
ventral sucker to mid region of pharynx and joining the long, tubular, genital atrium opening at the anterior margin of oral sucker.
Ovary post-testicular, situated in posterior fourth quarter of soma, seminal receptacle present, vitellaria consist of seven, long, tubes,
radiating ventral to seminal receptacle, all directed posteriorly. Uterine coils extend into middle of ecsoma and anteriorly opening into
the base of sinus sac. Eggs numerous. small.Excretory pore terminal.
