Order PROTOMONADINA 



No pseudopodia; with one or two flagella 

 Common genera — Codos^ga Stylohryon 



Poteriodendron Monas 



Dendrovionas Anthophysa 



(Common parasitic genera — Trypanosoma 



Leishmania) 

 Order POLYMASTIGINA 



Minute forms with three to eight or more flagella; mostly para- 

 sitic 



(Common parasitic genus — Giardia) 

 Order HYPERMASTIGINA 



With numerous flagella; parasitic in insects 



Class SARCODINA (or Rhizopoda) 



Forming pseudopodia; no pellicle, hut often with internal or external 

 skeletal structures 

 Subclass RHIZOPODA 



Pseudopodia temporary, without axial rods 

 Order PROTEOMYXA 



Pseudopodia thread-like, branching or joining one another 

 Common genus — Vampyrella 

 Order MYCETOZOA Slmie Molds 



Large multinucleate mass produced by fusion of several myx' 

 amoebae; occurring on decaying plant material; formerly con- 

 sidered to be closely related to the fungi 

 Order AMOEBINA 



No pellicle or test 

 Common genera — Amoeba 

 Pelomyxa 

 Order TESTACEA 



Body covered by a simple shell, usually with one opening through 



which the pseudopodia protrude 



Common genera — Arcella Amphitrema 



Hyalosphema Pseudodijflugia 



Difflugia Euglypha 



Centropyxis Cyphoderia 



Cucurhitella Trinema 



Pontigulasia Assulma 



Phryganella J^lehela 



Heleopera ^uadrulella 



Order FORAMINIFERA 



Large marine forms, usually with perforated, calcareous tests 



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