Abstract
Nine male worms collected from the intestine of freshwater fish Mastacembelus armatus from Haleji Lake, Sindh, Pakistan are being
described. The present species, when compared with the previously reported species, differs in several morphological characters such
as body size, size of proboscis hooks, shape of the body, size of bursa and presence of two bursal glands. On the basis of the above
morphological as well as morphometric differences worm in hand and previously described species, it is concluded that the worm is
new to science and therefore designated as Neoechinorhynchus macrorchis n.sp.
