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CLASSIFICATION OF ANIMALS 



Phylum, Protozoa 

 Subphylum, Plasmodroma 

 Class, Sarcodina 

 Class, Mastigophora 

 Class, Sporozoa 

 Subphylum, Ciliophora 

 Class, Ciliata 

 Class, Suctoria 



Phylum, Porifera 



Class, Calcarea 

 Class, Noncalcarea 



Phylum, Coelenterata 

 Subphylum, Cnidaria 

 Class, Hydrozoa 

 Class, Scyphozoa 

 Class, Anthozoa 

 Subphylum, Acnidaria ^ 

 Class, Tentaculata 

 Class, Nuda 



Phylum, Platyhelminthes 

 Class, Turbellaria 

 Class, Trematoda 

 Class, Cestoda 

 Class, Nemertea 



Phylum, Gastrotricha 



Phylum, Chaetognatha 



Phylum, Rotatoria 

 Class, Seisonidea 

 Class, Belloidea 

 Class, Monogonata 



Phylum, Nematoda 

 Class, Phasmidia. 

 Class, Aphasmidia 



Phylum, Nematomorpha 

 Class, Gordididea 

 Class, N ectonematoidea 



Phylum, Acanthocephala 



Phylum, Bryozoa 



Class, Entoprocta 

 Class, Ectoprocta 



Phylum, Brachiopoda 



Phylum, Annelida 



Class, Archiannelida 

 Class, Polychseta 

 Class, Oligochxta 

 Class, Hirudinea 

 Class, Myzostoma 

 Class, Echiurida 

 Class, Gephyrea ^ 



1 Often classified as a separate phylum, the Ctenophora. 



2 Sometimes classified as a separate phylum, the Gephyrea or Sipunculoidea. 



Fig. 74. — Phyla of the Animal Kingdom and their principal subdivisions. 



representative zoologists 



(A. S. Pearse, "Zoological Names," a list of Phyla, Classes and Orders 



