Dichotomous Key/Urochordata

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Dichotomous Key: Chordata
Kingdom: Animalia Phylum: Chordata

[edit] 1

• Adults sessile
  • Yes - Ascidiacea
  • No - #2

[edit] 2

• Animal surrounded by protein and cellulose and a complicated arrangement of filters
  • Yes - Larvacea
  • No - Thaliacea