This genus was created by Mackinnon and Ray in 1937.
This species was earlier described by Lankester and named Monocystis thalassemae.
There is one species recognised in this genus.
The mature sexual parasites are vermiform and immobile. The males are smaller than the females. The microgametocyte, when it becomes spherical, gives rise to numerous, elongate microgametes. These are similar to those of Aggregata.
The number of chromosomes appears to be seven.
- McKinnon DL, Ray HN (1937) A coccidian from the eggs of Thalassema neptuni Gaertner. Parasitology 29: 457-468