Fig. 6

Morphological features of gametocytes, which are used for identification of Haemoproteus species parasitizing Bucerotiformes birds. Macrogametocytes (a, b) of Haemoproteus upupae (a) and H. bucerotis (b). Note the different position of nuclei in macrogametocytes—close to central (a) and subcentral (b)—of these species, and the different morphology and mode of distribution of pigment granules in the cytoplasm (compare a with b). Long simple arrows—host cell nuclei. Short simple arrows—parasite nuclei. Simple arrowheads—pigment granules. Other explanations are given in the text