19) Monocystis nidata Boisson, 1957

Infested organ. Seminal vesicle

Type host. Pontodrilus ephippiger

Type locality. India and China

Description. Intrablastophorical, small cell like, measures 260 − 290 µm × 90 − 120 µm. Nucleus spherical with 50 µm in diameter. Cyst spherical, measuring 3 − 4 µm (diameter is not given). Gametes are not described. Spores navicular, 9 µm in length.