OUTLINE OF CLASSIFICATION OF PROTOZOA 



Class MASTIGOPHORA (or Flagellata) 



Usually with one or more flagella; with one kind of nucleus 

 Subclass PHYTOMASTIGINA 



Usually with chromatophores; with one to four flagella 

 Order CHRYSOMONADINA 



Minute yellowish or brownish, discoid forms with one or two 

 flagella; many of them able to form pseudopodia; they sometimes 

 lose flagella and form aggregations or colonies (palmella stage) 

 Common genera — Synura Uroglena 



Dinohryon 

 Order CRYPTOMONADINA 



Body covered by pellicle and therefore of constant form; palmella 

 stage not common; with one or two flagella; with one or two 

 elongated brown, red or blue-green chromatophores 

 Common genus — Chilomonas 

 Order PHYTOMONADINA 



With one or two flagella (seldom four or more) ; usually with 

 many green chromatophores; usually with a cellulose body 

 membrane 



Common genera — Chlamydomonas Pandorma 



Volvox Eudorina 



Gonium Pleodorina 



Order EUGLENOIDINA 



Body usually elongate; usually one, sometimes two or three 

 flagella; chromatophores, when present, green; nucleus usually 

 large and distinct 

 Common genera — Euglena Astasia 



Phacus Peranema 



Trachelomonas Heteronema 



Order DINOFLAGELLATA 



Body with transverse and longitudinal grooves; usually with a 

 transverse and a longitudinal flagellum; chromatophores brown 

 Common genera — Pendinium 

 Ceratium 

 Subclass ZOOMASTIGINA 



A few free-living and many parasitic forms, some of great economic 

 importance; no chromatophores; with one to many flagella; para' 

 basal body and thread near nucleus 

 Order RHIZOMASTIGINA 



With flagella and pseudopodia 

 Common genus — Mastigamoeba 



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