Fig. 27

Morphological features of gametocytes, which are used for identification of Haemoproteus species parasitizing passeriform birds (suborder Tyranni) of the families Eurylaimidae, Furnariidae, Pittidae, Thamnophilidae, Tyrannidae. Macrogametocytes (a–c, e–i) and microgametocytes (d) of H. circumnuclearis (a, b), H. pittae (c, d), H. tyranni (e), H. furnarius (f, g), H. formicarius (h), H. eurylaimus (i). Note that attenuated (snake-like) advanced gametocytes (f) develop in H. furnarius. Image a, c are from the type material, which is fading, resulting in pale staining and the poorly recognizable pigment granules and nuclei, however the overall form of gametocytes is readily visible. Long simple arrows—host cell nuclei. Short simple arrows—parasite nuclei. Simple arrowheads—pigment granules. Simple wide long arrows—space between developing gametocyte and envelope of infected erythrocyte. Other explanations are given in the text