Hysterothylacium pseudotumbili n.sp. (Nematoda: Anisakidae) from the marine fishes of Visakhapatnam, Bay of Bengal.

Hysterothylacium pseudotumbili n.sp. from the stomach and body cavity of marine fishes. Chrorinemus tol Couvier. Saurida undosquamis (Richardson), Lutianus russelli (Bleeker), Rastrilliger kanagurta (Cuvier) and Saurida pseudotumbili Dutt and Vidyasagar collected from Visakhapatnam (Bay of Bengal) is described and figured. A detailed examination has allowed us to erect a new species of Hysterothylacium to accommodate the worm. It shows remarkable differences from other known species of Hysterothylacium in respect of body measurements, the papillae on the lips arrangement, location of nerve ring and excretory pore, long intestinal caecum, position of vulva, number and arrangement of caudal papillae and size of the spicules. The new species is designated as Hysterothylacium pseudotumbili. Saurida pseudotumbili is the new host record. This is the first report of the genus in this host. Visakhapatnam coast is the new locality record.