New host and distribution records of the gill parasite Dactylogyrus sphyrnoides Gussev, 1976 (Platyhelminthes, Monogenoidea) on a Near Threatened Tor Barb, Tor tor (Hamilton, 1822) (Teleostei, Cyprinidae), in northeastern India

摘要

The parasitic monogenoid Dactylogyrus sphyrn- oides Gussev, 1976 was recorded for the first time on the gills of the Near Threatened freshwater fish Tor tor (Hamilton, 1822) that was collected in northeastern India. Dactylogyrus sphyrnoides was originally described from specimens infecting the gills of Barbus sarana Hamilton, 1822 in southern India. Our specimens conform to the original description of the species in all morphometric characteristics. Our report establishes a new host and distribution records for D . sphyrnoides and adds to the growing list of parasitic monogenoids exhibiting low host specificity.