Abstract
SYNOPSIS. The ultrastructure of gametocytes and microgametogenesis of Haemoproteus metchnikovi, an intracellular malaria parasite of chelonians, was compared with other malarial parasites. Gametocytes resemble those described for other avian, reptilian and mammalian malarial parasites. The process of microgametogenesis is similar in many respects to that reported for Leucocytozoon simondi (Aikawa et al., 1970) and Haemoproteus columbae (Bradbury and Trager, 1968). Atypical centrioles are described from both microgametocytes and macrogametocytes. Axoneme development begins before the microgametocyte leaves the host red blood cell. Fully developed microgametes which bud off from the parent gametocyte contain a single axoneme with the typical 9 + 2 pattern of microtubules.
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