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Major Group Identification

There are 21 major groups. A "major group" may be at any taxonomic level above order  i.e. phylum, subphylum, class or subclass.  

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  • Click on an image below of a known major group to go directly to that group.

Ephemeroptera (mayflies) 

Insecta
(insects)

Malacostraca (yabbies plus) 

Crustacea
(crustaceans)

Basommatophora 

Gastropoda
(snails)

Unionoida 

Bivalvia
(mussels)

Hydracarina (water mites) 

Acarina / Acari
(mites)

 

Oligochaeta
(worms)

Arhynchobdella 

Hirudinea
(leeches)

Symphypleona 

Collembola
(springtails)

Tricladida 

Platyhelminthes
(flat worms)

 

Nemertea
(proboscis worms)

 

Nematoda
(round worms)

 

Nematomorpha
(horsehair worms)

Hydrozoa 

Cnidaria
(hydra, jellyfish)

 

Bryozoa
(moss animalcules)

 

Porifera
(sponges)

  

Polychaeta
(bristle worms)

 

Rotifera
(wheel animalcules)

 

Protozoa
(protozoans)

 

Tardigrada
(moss bears)

 

Aphanoneura
(aphanoneurans)

 

Gastrotrichia
(gastrotrichs)

 
Information Sources: Williams 1980, Hawking & Smith 1997
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