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HANDBOOK OF PROTOZOOLOGY 



Poteriodendron petiolatum (Ehrenberg) (Fig. 46, b). Test 

 about 30 to 50 microns high. Fresh water. 



Family 4 Trypanosomatidae Doflein 



Body characteristically leaf-like, although changeable to a 

 certain extent. A single nucleus and a blepharoplast. A single 

 flagellum arises from a basal granule which may be independent 

 from, or united with, the blepharoplast (Figs. 5 and 47). The 



In vertebrate 

 host 



In invertebrate host 



In vertebrate 

 host 



Trypanosoma 



Trypanosoma 



Crithidia 



Leptomonas 



Leishmania 



Leishmania 



Leptomonas and 

 Phytomonas (in plant) 



Leishmania 



Crithidia 



Herpetomonas 



Trypanosoma 



Fig. 47 Diagrams showing the structural differences among the 

 genera of Trypanosomatidae. (After Wenyon). 



basal portion of the flagellum forms the outer boundary of the 

 undulating membrane which extends along the side of the 

 body. Exclusively parasitic. This family contains a number 

 of parasites which are responsible for serious diseases of man 

 and domestic animals in various parts of the world. 



Genus Trypanosoma Gruby. Parasitic in the circulatory 

 system of vertebrates. The body is leaf-like, pointed at the 

 flagellate end, and bluntly rounded, or rarely pointed, at the 

 other. Polymorphism which seems to be due to differences in 

 development, is common. The nucleus is located centrally. 



