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INTRODUCTION TO THE PROTOZOA 



Family COCHLOSOMATIDAE 



With 6 anterior flagella, 1 axostyle and a single nucleus. 

 Apparently without parabasal body. 



Cochlosoma 



Family HEXAMITIDAE 



With 6 or 8 flagella, 2 nuclei and sometimes axostyles and 

 median or parabasal bodies. Bilaterally symmetrical. 



Giardia 

 Hexaniila 

 Octomilus 

 Trepomonas 



Order TRICHOMONADORIDA 



With 3 to 6 flagella, of which 1 is trailing and may form part of an un- 

 dulating membrane. With 1 or many nuclei (the forms in vertebrates 

 have only 1 nucleus), but not with 2. With axostyle and parabasal body. 



Family MONOCERCOMONADIDAE 



With either a free or an adherent trailing flagellum but no 

 undulating membrane or costa. 



Chilomitus 

 Hexamastix 

 Monocercomonas 

 Protrichomonas 



Family TRICHOMONADIDAE 



With an undulating membrane and a costa. Sometimes with 

 a pelta. 



Pentatrichomonas 



Trichomonas 



Tritrickomonas 



Order HYPERMASTIGORIDA 



With many flagella, 1 nucleus and often multiple axostyles and para- 

 basal bodies. Intestinal parasites of termites and roaches. 



Trichonynipha 



