INTRODUCTION TO THE PROTOZOA 31 



Superfamily HAEMOGREGARINICAE 



Zygote active (ookinete), secreting a flexible membrane which is 

 stretched during development. Heteroxenous. Life cycle in- 

 volves 2 hosts, one vertebrate and the other invertebrate. In 

 cells of circulatory system of vertebrates and digestive system 

 of invertebrates. 



Family HAEMOGREGARINIDAE 



Oocysts small, without sporocysts. 



Haemogregarina 



Family HEPATOZOIDAE 



Oocysts large, containing many sporocysts, each with 4 to 

 12 or more sporozoites. Microgametes non-flagellate. 



Hepatozoon 



Family KARYOLYSIDAE 



Sporoblasts become sporokinetes which invade the egg of a 

 mite before secreting sporocyst membrane. Sporocysts 

 with numerous sporozoites. Gametocytes in erythrocytes 

 of vertebrate host. 



Karyolysus 



Suborder EIMERIORINA 



Macrogamete and microgametocyte develop independently. 

 Syzygy absent. Microgametocyte typically produces many micro- 

 gametes. Zygote not motile. Sporozoites typically enclosed in 

 a sporocyst. Monoxenous or heteroxenous. 



Family EIMERIIDAE 



Development in host cell proper. Oocysts and schizonts 

 without attachment organ. Oocysts with 0, 1, 2, 4 or many 

 sporocysts, each with 1 or more sporozoites. Monoxenous. 

 Schizogony in the host, sporogony typically outside. Mi- 

 crogametes with 2 flagella. 



Dorisiella Tyzzeria 



Einieria Wenyonella 



Isospora 



