Acta Protozool Acta Protozool.
Parasite nuclei are unpaired throughout the cycle.
The PV wall does not arise as a product of the sporont surface. Small vesicles containing dense substance move from the xenoma cytoplasm to discharge their contents into the PV space. Thus a granular matrix is produced in which tubular formations appear, unconnected with sporoblast surface. The dense substance and tubules ultimately separate the PV space into separate compartments for individual spores. In meront cytoplasm, microtubules were observed.