Dichotomous Key/Chordata
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- Feeding method
- Filter - Urochordata
- Jawless, sucking mouth - Myxini
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- No options yet
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- Jaw
- Present - #5
- Not present - Petromyzontidae
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- Skeletal material
- Cartilage - Chondrichthyes
- Bone - #6
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- Fins
- Lobed - #11: Sarcopterygii
- Rayed - Actinopterygii
11: Sarcopterygii edit
- Ability to breathe air
- Present - Dipnoi
- Not present - Actinistia