Abstract
Myxobolus buri sp. n. is described from the brain of yellowtails, Seriola quinqueradiata T. et S. with serious scoliosis. The sites of infection were the cerebral cavities and the surfaces of the olfactory lobes, optic lobes and medulla oblongata, Spores of the species were differentiated from those of the other members of the genus Myxobolus on the basis of a through recording of their shape, structure and dimensions by means of light and scanning electron micrography.