THE TELOSPORASIDA AND THE COCCIDIA PROPER 



159 



NUMBER 

 SPOROCYSTS 

 PER OOCYST 



NUMBER SPOROZOITES PER SPOROCYST 

 I 2 3 4 8 16 n 







8 



16 



u I); 





^SClV 



^■M^i>' 





: ; II i ! 



CYCLOSPORA 



OCTOSPORELLA 



III;; 



■-iihOii); 









PFEIFFERINELLA 



CRYPTDSPORIDIUy ^?l^,y-*5**'* 

 iiZZERlA 



ISOSPORA 00RI51ELLA 



WENYONELLA 





PYTHONELLA 



-'JSa®' 





I I I I \ 



\ ^vy^'' / 



[^^.\\y\[{\l>] iSJii; ^ii'j 





Fig. 22. Numbers of sporocysts per oocyst and of sporozoites per sporocyst in the 



genera of the suborder Eimeriorina. (In the genera without sporocysts, the 

 numbers of sporozoites per oocyst are given. ) (Original) 



sporozoites are typically enclosed in a 

 sporocyst. All the coccidia of domestic 

 animals and man, with one possible ex- 

 ception, belong to two families, the 

 Eimeriidae and Cryptosporidiidae. An- 

 other family, the Lankesterellidae, is of 

 considerable interest. Becker (1934) 

 wrote a classic review of the coccidia. 

 Orlov (1956) discussed those of domestic 

 animals, but was seriously handicapped 

 by lack of information about non- Russian 

 work. Becker (1956) and Pelle'rdy (1956, 

 1957) have given checklists of the species 

 of coccidia. The coccidia of the avian 



orders Galliformes, Anserlformes and 

 Charadriiformes were reviewed by Levine 

 (1953). 



FAMILY EIMERIIDAE 



Members of this family have a single 

 host. Schizogony and gametogony take 

 place within the host cells, and sporogony 

 ordinarily occurs outside the host's body. 

 The oocysts and schizonts lack an attach- 

 ment organ. The oocysts contain 0, 1, 2, 

 4 or many sporocysts, each containing 1 



