A checklist of the species under the genus Monocystis Von Stein, 1848 (Apicomplexa: Sporozoa: Monocystidae) described from oligochaete hosts Author Sarkar, Sutapa Author Bandyopadhyay, Probir K. prabir0432@hotmail.com text Zootaxa 2013 2013-09-16 3710 4 381 388 journal article 4792 10.11646/zootaxa.3710.4.7 02be72df-b930-4f7a-9c69-60ed36d29347 1175-5326 6164248 5B76EC26-3663-4725-9F2F-6F19F149F303 16) Monocystis megascolexae Kar, 1946 Infested organ. Seminal vesicles Type host. Megascloex sp. Type locality. Calcutta, West Bengal , India Description. Trophozoite measures 135.8 429.0 µm ×58.2–97.5 µm with variable form, elongated, one end rounded, the other end pointed. Nucleus spherical and measures 25 µm in diameter. Gametocyst spherical and 135 µm in diameter. Oocysts spindle shaped with blunt end measuring 15.43 8.24 µm.