Fig. 25

Morphological features of gametocytes, which are used for identification of Haemoproteus species parasitizing Strigiformes birds. Macrogametocytes (a, d, e) and microgametocytes (b, c) of Haemoproteus syrnii (a–c) and H. noctuae (d, e). Note that volutin in H. syrnii gametocytes is arranged in compact roundish or circular granules (a, b), but this is not a case in H. noctuae (d, e). Long simple arrows—host cell nuclei. Short simple arrows—parasite nuclei. Simple arrowheads—pigment granules. Triangle wide arrowheads—volutin. Other explanations are given in the text