The largest phylum in the Animalia kingdom with over 80% of known species of animals as members. Members are invertebrate animals having an exoskeleton, a segmented body, and paired joint appendages. 

Arthropoda 

Members of the Chordata phylum are distinguished by having a notochord, dorsal hollow nerve cord, endostyle or thyroid, pharyngeal slits, and a post-anal tail at some point in their lifetime.

Chordata

- Arthropoda 
- Mollusca
- Annelida
- Platyhelminthes
- Nematoda
- Echinodermata
- Chordata

Georgetown University

A biological kingdom in the Eukarya domain, members of the kingdom (animals) are multicellular, cannot produce their own food, and can move their bodies.

Animalia

One or more classes grouped together, distinguishes differences within a kingdom.

Called phylum/phyla in zoology and division(s) in botany.

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