ISOLATION OF A NEW SPECIES OF ROTIFER-ATTACKING OLPIDIUM

Olpidium paradoxum sp. nov. was found to attack adult loricate rotifie rs and their eggs in a sample of pond water in Japan. The fungus produ ced zoosporangia inside the host from which exit tubes of variable len gth grew to the outside environment. Pyriform zoospores with a single long posterior flagellum were released from the sporangia.