Dichotomous Key/Chordata
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1[edit | edit source]
2[edit | edit source]
- Feeding method
- Filter - Urochordata
- Jawless, sucking mouth - Myxini
3[edit | edit source]
- No options yet
4[edit | edit source]
- Jaw
- Present - #5
- Not present - Petromyzontidae
5[edit | edit source]
- Skeletal material
- Cartilage - Chondrichthyes
- Bone - #6
6[edit | edit source]
- Primary habitat (does not include secondary aquatic animals such as newts, aquatic snakes, whales, dolphins, ....)
7[edit | edit source]
8[edit | edit source]
9[edit | edit source]
10[edit | edit source]
- Fins
- Lobed - #11: Sarcopterygii
- Rayed - Actinopterygii
11: Sarcopterygii[edit | edit source]
- Ability to breathe air
- Present - Dipnoi
- Not present - Actinistia