Procamallanus diacanthum n. sp. (Nematoda: Camallanidae) from the intestine of marine fish Johnius diacanthus (Lacépède), India.

The present paper describes a new species of a nematode of the family Camallanidae Railliet et Henry, 1915 from the intestine of marine fish Johnius diacanthus (Lacépède) from Kalingapatnam coast. These specimens do not agree with the description of the hitherto described species of the genus. Hence a detailed description and status of the specimens are given in this paper. The new species is characterized by body measurements, structure of spiral thickenings, nerve ring and excretory pore position, absence of gubernaculum, number and arrangement of caudal papillae, length of spicules and shape of tail end. Thus it could be considered as a new species. Procamallanus diacanthum.