EN
Two males of a camallanid nematode belonging to the genus Zeylanema were obtained from the intestine of Channa (Ophiocephalus) punctatus Bloch. The specimens do not agree with the description of known species of the genus Zeylanema, hence a new species Zeylanema chiralensis has been established to describe these nematodes. The new species is distinguished by body size, location of the nerve ring, length of oesophagus, number of longitudinal ridges and size of spicules.