Dichotomous Key/Testudines

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Dichotomous Key

Testudines
Kingdom	Animalia
Phylum	Chordata
Subphylum	Vertebrata
Class	Reptilia
Order	Testudines
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1

• Number of vomers
  • One - #2: Casichelydia
  • Two - Proganochelys

2: Casichelydia

• Head retraction
  • Head can not be fully placed inside shell - Chelydridae
  • Head can be fully placed inside shell - #3